Cluster Master Science Plan - History
Cluster-I planning
Prior the launch of Cluster-I in June 1996, the Science Operations
Working Group had prepared and approved a Master Science Plan for the first
six months
of mission operations (i.e. the first constellation, in which the spacecraft
have closely-spaced orbits such that they form a approximately 600km sided
tetrahedron when crossing the northern cusp).
This Cluster-I Master Science Plan was edited by the EDI instrument team
and issued as MPE technical note CL-MPE-TN-0009. The full text of the
final issue (version 3.2) of the Cluster-I Plan
is available in PDF format.
Cluster-II pre-launch planning
Following the approval of Cluster-II in 1997, JSOC took over responsibility
for editing the Master Science Plan. A revised Plan for the first six months
was produced in the summer of 1998. This was prepared to allow ESOC to confirm
that the Master Science Plan was consistent with various design changes in
spacecraft operations between Cluster-I and Cluster-II. It also included minor
changes in the Cluster orbit arising from the changed launch scenario.
The changes in the Master Science Plan (to version 4.0.1) are described in a
JSOC technical note (DS-JSO-TN-0030), which is available in
PDF format.
Cluster-II first constellation
Further revision of the Master Science Plan (to version 5.1) was
carried out in autumn 2000 after the Cluster launches. This addressed
various issues identified as a result of the assessment of version 4.0.1 by
the Science Operations Working Group. In particular, the ESOC assessment of
version 4.0.1 indicated that the duration of
burst mode data-taking could be increased by about 16%.
Thus the Plan was revised to take account of this extra resource.
The full text of version 5.1 of the Master Science Plan
is available in PDF format.
It covers a period of about four months from 2 December 2000 to
9 April 2001 (orbits 68 to 121).
The Master Science Plan for the first constellation was further
revised in January 2001 - to take account of final plans for the
transition from commissioning into operations. This resulted in the
loss of some early orbits owing to the extension of commissioning
activities and the adoption of reduced operations over Christmas 2000.
The new Plan was version 5.3 and covered operations from 16 January
2001 to 5 June 2001. The full text is available in
PDF format.
January 2002 manoeuvres
These are Bryant plots showing the location of the planned manoeuvres
with respect to data-taking periods. The orbit manouevres on each spacecraft
are indicated by different coloured shapes following the
Cluster plotting guidelines,
e.g. red solid diamond for spacecraft 2 (Salsa).
The period of attitude manoeuvres on 11 Jan 2002 is marked by a blue
ellipse. Note that these plots are available only as bitmapped graphics
and so quality is inferior to the vector graphics used in the main
Bryant plots above.
April 2002 attitude manoeuvres
On 16 April 2002 there will be a 6-hour period allocated for
manoeuvres to adjust the attitudes of the four Cluster spacecraft.
This periods runs from 09:00 to 15:00 UTC.
To show the impact of these manoeuvres on science operations, the
figure below uses the Bryant plot format to show their location with
respect to scientific regions and events.
The manoeuvres are marked by the red line, while the blue diamonds
indicate magnetopause crossings and the grey-green triangles indicate
bow shock crossings.
The reference spacecraft for this plot (i.e. defining perigee and
boundary crossings) is spacecraft 3 (Samba).
As a general rule we avoid instrument operations from one hour
before each manoeuvre until eight hours after each manoeuvre.
Thus the effect of the planned manoeuvres will be to inhibit operations
in the following regions on orbit 278:
outbound magnetosheath
outbound bow shock and foreshock region
Note that the restriction of payload operations around the
manoeuvres is
required to allow time for configuration of the spacecraft and to protect
those instruments that are sensitive to gases released during the
manoeuvres.
June 2002 manoeuvres
In June 2002 the Cluster separation will be increased from about 100 km
up to several thousand kilometres. A summary of the manoeuvres planned to
achieve this increase has been prepared by ESOC and is available in
PDF format. This presents the date, time and
duration of each manoeuvre on each of the four spacecraft.
To show the impact of these manoeuvres on science operations, the
figure below uses the Bryant plot format to show their location with
respect to scientific regions and events.
The manoeuvre start times are marked by black squares (spacecraft 1),
red diamonds (2),
green circles (3) and magenta triangles (4) - in line with the standard
plotting convention for Cluster.
For clarity we have not marked the manoeuvre end times as these are
typically a few minutes to two hours after the start time - and thus
close to the start times on the scale of this plot.
The only exception to this is 30 hour period planned for
slew and spin manoeuvres. This is marked by the long yellow line.
The small blue diamonds show the location of magnetopause crossings
and the small teal (dirty green) diamonds show the neutral sheet crossings.
The two short blue bars show the location of a lunar eclipse of some of the
spacecraft.
The reference spacecraft for this plot (i.e. defining perigee and
boundary crossings) is spacecraft 1 (Rumba).
As a general rule we avoid instrument operations from one hour
before each manoeuvre until eight hours after each manoeuvre.
Thus the effect of the planned manoeuvres will be to inhibit operations
in the following regions:
perigee and northern cusp on orbit 304 |
northern cusp and magnetopause on orbit 305 |
southern cusp and magnetopause on orbit 306 |
both cusps, magnetopauses and magnetosheath on orbit 307 |
both cusps, magnetopauses and magnetosheath on orbit 309 |
perigee on orbit 311 |
northern lobe on orbit 312 |
southern lobe on orbit 313 |
neutral sheet on orbit 315 |
perigee on orbit 317 |
perigee on orbit 319 |
|
Note that we still have good opportunities to sample the skimming
magnetopause on orbits 308 and 310 (only a modest increase in
ram pressure above its median is needed to cause magnetopause crossings
on orbit 310). We also have a good opportunity for payload operations
during the short lunar eclipse on orbit 313.
Note that the restriction of payload operations around the
manoeuvres is
required to allow time for configuration of the spacecraft and to protect
those instruments that are sensitive to gases released during the
manoeuvres.
Switch to Maspalomas
From 15 September 2002 Maspalomas will take over from Redu as the second Cluster ground station.
This switchover will impact science data-taking as follows:
Tests of telemetry downlink to Maspalomas will result in science data-taking
being "at risk" for some short periods (but only on one spacecraft at a time).
These tests will be arranged to minimise the impact on data return.
The amount of data-taking in the period 16 September to 02 October (orbits 342 to 347, PP 122 and 123)
has been reduced to 105% equivalent normal mode. This provides increased margin in case of problems during
the transition.
Long eclipses 2002
The Cluster spacecraft will experience a series of long eclipses (up to 4 hours duration)
in early September 2002 - near the apogees of orbits 336 to 338.
In order to conserve power during these eclipses there will be no data-taking from 1 hour before
the start of each eclipse until 12 hours after the end of each eclipse. This is shown in
the appropriate Bryant plots.
In the cases that the eclipse duration is less than 2 hours, data-taking will continue
through the eclipse -- but only on those spacecraft that experience a short eclipse. This difference
between operations on different spacecraft is NOT shown on the Bryant plots.
Attitude manoeuvres, October 2002
Manoeuvres to maintain the attitude of the Cluster spacecraft within the required limits
(with respect to the Sun) will take place between 19:00 and 23:00 on 7 October 2002
(apogee of orbit 351).
In case any trim manoeuvres are required after the attitude manoeuvres, an additional
manoeuvre period has been scheduled at 05:30 on 16 October 2002 (perigee of orbit
355).
As many instruments have to be switched into safe modes during both manoeuvre periods,
there will be no data-taking from 1 hour before each manoeuvre until 7 hours
after the manoeuvre period and most of the instruments sensitive to manoeuvres will
be switched on 8 hours after the manoeuvre period.
These two periods are shown on the appropriate Bryant plots.
Attitude manoeuvres, January 2003
Manoeuvres to maintain the attitude of the Cluster spacecraft within the required limits
(with respect to the Sun) will take place between 10:00 and 18:00 on 15 January 2003
(apogee of orbit 393).
Orbit trim manoeuvres are planned after the attitude manoeuvres and have been
scheduled for a short period around 03:30 on 24 January 2003 (perigee of orbit
397).
As many instruments have to be switched into safe modes during both manoeuvre periods,
there will be no data-taking from 1 hour before each manoeuvre until 7 hours
after the manoeuvre period and most of the instruments sensitive to manoeuvres will
be switched on 8 hours after the manoeuvre period.
These two periods are shown on the appropriate Bryant plots.
Attitude manoeuvres, April 2003
Manoeuvres to maintain the attitude of the Cluster spacecraft within the requ
ired limits
(with respect to the Sun) will take place between 07:00 and 11:30 on 25 April 20
03
(apogee of orbit 435).
No orbit trim manoeuvres are currently planned after these attitude manoeuvres a
s the
expected drift is small and unlikely to cause a major perturbation of the tetrah
edron
before the next orbit manoeuvres start in early June 2003.
As many instruments have to be switched into safe modes during both manoeuvre
periods,
there will be no data-taking from 1 hour before each manoeuvre until 7 hours
after the manoeuvre period and most of the instruments sensitive to manoeuvres w
ill
be switched on 8 hours after the manoeuvre period.
These two periods are shown on the appropriate Bryant plots.
Orbit manoeuvres, June 2003
In June 2003 the Cluster separation will be decreased from about 5000 km
up to about 200 km. A table of the manoeuvres planned to
achieve this decrease has been provided by ESOC and made available here in
PDF format. This presents the date, time and
duration of each manoeuvre on each of the four spacecraft.
To show the impact of these manoeuvres on science operations, the
figure below uses the Bryant plot format to show their location with
respect to scientific regions and events.
The manoeuvre start times are marked by black squares (spacecraft 1),
red diamonds (2),
green circles (3) and magenta triangles (4) - in line with the standard
plotting convention for Cluster.
Solid symbols show manoeuvre start times while open symbols show
manoeuvre end times. In many cases the manoeuvre durations are only
a few minutes or seconds - and thus not distinguishable
from the start times on the scale of this plot.
The only exception to this is 12 hour period planned for
slew and spin manoeuvres. This is marked by the long yellow line.
The small blue asterisks show the location of magnetopause crossings
and the small blue plus signs show the plasmasheet entry and exit.
The reference spacecraft for this plot (i.e. defining perigee and
boundary crossings) is spacecraft 1 (Rumba).
As a general rule we avoid instrument operations from one hour
before each manoeuvre until eight hours after each manoeuvre.
Thus the effect of the planned manoeuvres will be to inhibit operations
in the following regions:
outbound leg of orbit 452 including the
magnetopause crossing |
inbound leg of orbit 453 including the
magnetopause crossing |
outbound magnetopause on orbit 454 |
inbound magnetosheath and magnetopause on orbit 456 |
perigee on orbit 458 |
outbound magnetopause on orbit 459 |
|
inbound leg of orbit 460 |
inbound leg of orbit 462 but after the skimming magnetopause
encounter |
perigee on orbit 464 |
perigee on orbit 466 |
perigee on orbit 468 |
|
Note that we still have good opportunities to sample the skimming
magnetopause on orbits 461 to 464 (only a modest increase in
ram pressure above its median is needed to cause magnetopause crossings
on orbit 463).
Note that the restriction of payload operations around the
manoeuvres is
required to allow time for configuration of the spacecraft and to protect
those instruments that are sensitive to gases released during the
manoeuvres.
Long eclipses 2003
The Cluster spacecraft will experience a series of long eclipses
(3 to 4 hours duration on all four spacecraft)
in early September 2003 - near the apogees of orbits 491 and 492.
In order to conserve power during these eclipses there will be
no data-taking from 1 hour before
the start of each eclipse until 12 hours after the end of each eclipse. This is
shown in
the appropriate Bryant plots.
There are also short eclipses (less than 2 hours duration on all four
spacecraft) near the apogee of orbit 490.
It is expected that there will be data-taking during these eclipses, but
this is subject to confirmation.
Attitude manoeuvres, Autumn 2003
Manoeuvres to maintain the attitude and spin of the Cluster spacecraft
within the required limits (with respect to the Sun) will take place
during three periods in late September/early October as follows:
26 September, 18:00 to 23:00 UTC (outbound leg of orbit 500), PP175
29/30 September, 22:00 to 01:00 UTC (inbound leg of orbit 501), PP176
8 October, 04:10 to 05:10 UTC (perigee at start of orbit 505), PP177
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking from 1 hour before each
manoeuvre until 7 hours after the manoeuvre period and most of the
instruments sensitive to manoeuvres will
be switched on 8 hours after the manoeuvre period.
These periods are shown on the appropriate Bryant plots.
To balance this loss of data-taking extra periods of BM1 have been added as f
ollows:
1.3 hours at interior cusp on orbit 500
2.0 hours at neutral sheet crossing on orbit 501
1.5 hours at neutral sheet crossing on orbit 504
Attitude manoeuvres, January 2004
Manoeuvres to maintain the attitude and spin of the Cluster spacecraft
within the required limits (with respect to the Sun) will take place
during during three periods in January 2004 as follows:
07 January 2004, 14:00 to 20:00 (orbit 543, around apogee)
09 January 2004, 12:00 to 21:00 (orbit 544, outbound bow shock to apogee)
16 January 2004, around 01:45 (perigee of orbit 547)
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking from 1 hour before each
manoeuvre until 7 hours after the manoeuvre period and most of the
instruments sensitive to manoeuvres will
be switched on 8 hours after the manoeuvre period.
These periods are shown on the appropriate Bryant plots.
To balance this loss of data-taking extra periods of BM1 have been added as
follows:
3 hours at the outbound bow shock on orbit 543
3 hours just after apogee (in the solar wind) on orbit 544
1.7 hours at the outbound bow shock on orbit 547
Orbit manoeuvres, May/June 2004
In May 2004 the Cluster separation will be increased from about 200 km
up to 1300/1000 km. A detailed table of the planned manoeuvres has been
prepared by ESOC and can be downloaded as a
PDF file
(new version dated 30 March).
This is an update of an earlier plan dated 26 February (PDF file).
The old plan has been retained here for completeness of the historical record since
it was used to set up the safety windows in the Master Science Plan.
The two manoeuvre plans are consistent within the safety margins used in MSP preparation.
Thus the safety windows have not been changed so that priority can be given to other issues that
are important for the overall scientific return.
To show the impact of these manoeuvres on science operations, the
figure below uses the Bryant plot format to show their location with
respect to scientific regions and events.
The manoeuvre start times are marked by black squares (spacecraft 1),
red diamonds (2),
green circles (3) and magenta triangles (4) - in line with the standard
plotting convention for Cluster.
Solid symbols show manoeuvre start times while open symbols show
manoeuvre end times. In many cases the manoeuvre durations are only
a few minutes or seconds - and thus not distinguishable
from the start times on the scale of this plot.
The reference spacecraft for this plot (i.e. defining perigee and
boundary crossings) is spacecraft 1 (Rumba).
As a general rule we avoid instrument operations from one hour
before each manoeuvre until eight hours after each manoeuvre.
Note that the restriction of payload operations around the
manoeuvres is
required to allow time for configuration of the spacecraft and to protect
those instruments that are sensitive to gases released during the
manoeuvres.
Attitude manoeuvres, August 2004
Manoeuvres to maintain the attitude and spin of the Cluster spacecraft
within the required limits (with respect to the Sun) will take place
during during two periods in August 2004 as follows:
22 August 2004, 00:15 to 02:30 (orbit 639, around apogee)
28 August 2004, around 10:30 (perigee of orbit 642)
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking from 1 hour before each
manoeuvre until 7 hours after the manoeuvre period and most of the
instruments sensitive to manoeuvres will
be switched on 8 hours after the manoeuvre period.
These periods are shown on the appropriate Bryant plots.
To balance this loss of data-taking extra periods of BM1 have been added as
follows:
2 hours in the plasmasheet on orbit 639 during a conjunction with Double Star TC-1
2 hour period in the plasmasheet on orbit 642 extended to 3 hours
Note that the restriction of payload operations around the
manoeuvres is
required to allow time for configuration of the spacecraft and to protect
those instruments that are sensitive to gases released during the
manoeuvres.
Attitude manoeuvres, December 2004
Manoeuvres to maintain the attitude and spin of the Cluster spacecraft
within the required limits (with respect to the Sun) will take place
during during two periods in December 2004 as follows:
09 December 2004, 16:30 to 19:30 (orbit 685, around apogee)
15 December 2004, around 20:00 (perigee of orbit 688)
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking from 1 hour before each
manoeuvre until several hours after the manoeuvre period and the
instruments sensitive to manoeuvres will
be switched on at least 8 hours after the manoeuvre period.
These periods are shown on the appropriate Bryant plots.
To balance this loss of data-taking extra periods of BM1 have been added as
follows:
1.5 hour period at the outbound magnetopause on orbit 685 extended to 3.6 hours
2.2 hours at the outbound bow shock on orbit 688
Note that the restriction of payload operations around the
manoeuvres is
required to allow time for configuration of the spacecraft and to protect
those instruments that are sensitive to gases released during the
manoeuvres.
Attitude manoeuvres, March 2005
Manoeuvres to maintain the attitude and spin of the Cluster spacecraft
within the required limits (with respect to the Sun) will take place
during during two periods in March 2005 as follows:
14 March 2005, 10:30 to 16:00 (orbit 725, before apogee)
23 March 2005, around 08:30 (perigee of orbit 729)
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking from 1 hour before each
manoeuvre until several hours after the manoeuvre period and the
instruments sensitive to manoeuvres will
be switched on at least 8 hours after the manoeuvre period.
These periods are shown on the appropriate Bryant plots.
To balance this loss of data-taking, the BM1 periods have been adjusted as
follows:
added new BM of 2 hours in the northern cusp on orbit 725
extended BM at outbound bow shock on orbit 726 by 36 mins
added new BM of 1.5 hours at outbound bow shock on orbit 727
BM on orbit 728 moved from bow shock to magnetopause and adjusted to 2.5 hours
BM on orbit 729 moved from magnetopause to solar wind and adjusted to 2 hours
Note that the restriction of payload operations around the
manoeuvres is
required to allow time for configuration of the spacecraft and to protect
those instruments that are sensitive to gases released during the
manoeuvres.
Attitude manoeuvres, October 2005
Manoeuvres to maintain the attitude and spin of the Cluster spacecraft
within the required limits (with respect to the Sun) will take place
on 5/6 October 2005 from 19:00 to 00:40 (orbit 811, before apogee).
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking from 1 hour before each
manoeuvre until several hours after the manoeuvre period and the
instruments sensitive to manoeuvres will
be switched on at least 8 hours after the manoeuvre period.
These periods are shown on the appropriate Bryant plots.
To balance this loss of data-taking,
a new BM of 1.9 hours is placed at in the northern cusp on orbit 811.
Note that the restriction of payload operations around the
manoeuvres is
required to allow time for configuration of the spacecraft and to protect
those instruments that are sensitive to gases released during the
manoeuvres.
Phasing manoeuvres, November 2005
Manoeuvres to adjust the separation of the Cluster spacecraft
will take place
during during three periods in November 2005 as follows:
02 November, 17:21 to 20:52 (drift start manoeuvre, around perigee of orbit
823)
14 November, 16:05 to 18:51 (drift stop manoeuvre, location TBD)
19 November, 10:15 to 16:46 (trim manoeuvre, location TBD)
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking from 1 hour before each
manoeuvre until several hours after the manoeuvre period and the
instruments sensitive to manoeuvres will
be switched on at least 8 hours after the manoeuvre period.
These periods are shown on the appropriate Bryant plots.
To balance this loss of data-taking, the BM1 periods have been adjusted as
follows:
added new BM of 2 hours at skimming magnetopause on orbit 823
extended BM (3 hours rather than 1) at inbound magnetopause on orbit 828
extended BM (3 hours rather than 1) at inbound magnetopause on orbit 830
Note that the restriction of payload operations around the
manoeuvres is
required to allow time for configuration of the spacecraft and to protect
those instruments that are sensitive to gases released during the
manoeuvres.
Attitude manoeuvres, January 2006
Manoeuvres to maintain the attitude and spin of the Cluster spacecraft
within the required limits (with respect to the Sun) will take place
in January 2006:
06 January, 12:00 to 15:00 (attitude manoeuvres, from outbound magnetopause
to bow shock on orbit 850)
13 January, 03:30 to 06:00 (trim manoeuvres, around perigee of orbit 853)
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking from 1 hour before each
manoeuvre until several hours after the manoeuvre period and the
instruments sensitive to manoeuvres will
be switched on at least 8 hours after the manoeuvre period.
These periods are shown on the appropriate Bryant plots.
To balance this loss of data-taking, the BM1 periods have been adjusted as
follows:
extended BM (3.7 hours rather than 1.5) at inbound bow shock on orbit 850
extended BM (3 hours rather than 1) at inbound magnetopause on orbit 853
Note that the restriction of payload operations around the
manoeuvres is
required to allow time for configuration of the spacecraft and to protect
those instruments that are sensitive to gases released during the
manoeuvres.
Attitude manoeuvres, April 2006
Manoeuvres to maintain the attitude and spin of the Cluster spacecraft
within the required limits (with respect to the Sun) will take place
in April 2006:
07 April, 07:00 to 20:30 (attitude manoeuvres, during the solar wind period on orbit 888)
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking from 1 hour before each
manoeuvre until several hours after the manoeuvre period and the
instruments sensitive to manoeuvres will
be switched on at least 8 hours after the manoeuvre period.
These periods are shown on the appropriate Bryant plots.
To balance this loss of data-taking, the BM1 periods have been adjusted as
follows:
extended BM (4.0 hours rather than 2.5) at outbound bow shock on orbit 888
new BM (2.3 hours) at inbound magnetopause on orbit 888
Note that the restriction of payload operations around the
manoeuvres is
required to allow time for configuration of the spacecraft and to protect
those instruments that are sensitive to gases released during the
manoeuvres.
Phasing manoeuvres, May/June 2006
Manoeuvres to adjust the separation of the Cluster spacecraft
will take place
during during four periods in May and June 2006 as follows:
19 May, 07:03 to 08:13 (drift start manoeuvres, around perigee of orbit 906)
14 June, 10:23 to 13:06 (drift stop manoeuvre, around perigee of orbit 917)
21 June, 13:44 to 16:26 (trim manoeuvre, around perigee of orbit 920)
28 June, 16:39 to 19:42 (trim manoeuvre, around perigee of orbit 923)
To aid long-term planning we allow a 20 minute margin on the time of the manoeuv
res.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking from 1 hour before each
manoeuvre until several hours after the manoeuvre period and the
instruments sensitive to manoeuvres will
be switched on at least 8 hours after the manoeuvre period.
These periods are shown on the appropriate Bryant plots.
To balance this loss of data-taking, the BM1 periods have been adjusted as
follows:
new BM (1.7 hours) at inbound bow shock on orbit 906
extended BM (2.8 hours rather than 1.6) at inbound magnetopause on orbit 917
extended BM (3.6 hours rather than 3) at outbound magnetopause on orbit 918
extended BM (3.1 hours rather than 1.5) at inbound magnetopause on orbit 920
Note that the restriction of payload operations around the
manoeuvres is
required to allow time for configuration of the spacecraft and to protect
those instruments that are sensitive to gases released during the
manoeuvres.
Attitude manoeuvres, July 2006
Manoeuvres to maintain the attitude and spin of the Cluster spacecraft
within the required limits (with respect to the Sun) will take place
in July 2006:
11 July, 07:00 to 10:00 (sc 1 & 2)
12 July, 12:00 to 15:30 (sc 3 & 4)
These both fall during orbit 928 on the outbound and inbound legs respectively.
In addition trim manoeuvres are planned:
20 July, 03:30 to 04:30 (all sc)
which is around perigee at start of orbit 932.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking from 1 hour before each
manoeuvre until several hours after the manoeuvre period and the
instruments sensitive to manoeuvres will
be switched on at least 8 hours after the manoeuvre period.
These periods are shown on the appropriate Bryant plots.
In response to the attitude manoeuvre changes
the BM1 periods have been adjusted as
follows:
extended BM (1.8 hours rather than 1.5) at plasmasheet on orbit 927
old BM (3 hours) at plasmasheet on orbit 928 deleted as most instruments wil
l then be
off following the first attitude manoeuvres
new BM (2.9 hours) at plasmasheet on orbit 929
due to pressure of deadlines, no BM adjustment was made for the trim manoeuv
res.
Note that the restriction of payload operations around the
manoeuvres is
required to allow time for configuration of the spacecraft and to protect
those instruments that are sensitive to gases released during the
manoeuvres.
Long eclipses 2006
The Cluster spacecraft will experience a series of umbral eclipses
in mid-September 2006. There will not be enough power to operate
the payloads in these periods, so they will
switched off as shown in the table below.
Due to the latest power constraints the SSRs will be emptied before
each eclipse. Thus
no burst mode adjustment will be made to balance the no-data-taking
periods (as has been the practice in previous long eclipse seasons).
Given the absence of burst mode balancing, the payload off periods
have not been consolidated to focus on 3 or 4 spacecraft operations
(as was also done in previous seasons). The payload off periods are restricted
to those requested by ESOC.
Spacecraft |
Payload off |
Payload on |
2 |
08/09/2006 17:00 |
09/09/2006 06:00 |
2 |
10/09/2006 17:00 |
11/09/2006 15:30 |
3 |
10/09/2006 19:00 |
11/09/2006 13:00 |
4 |
10/09/2006 21:00 |
11/09/2006 14:30 |
3 |
13/09/2006 00:00 |
13/09/2006 22:00 |
2 |
13/09/2006 02:00 |
14/09/2006 00:00 |
4 |
13/09/2006 02:00 |
14/09/2006 00:00 |
3 |
15/09/2006 09:00 |
16/09/2006 07:00 |
4 |
15/09/2006 10:30 |
16/09/2006 08:30 |
1 |
15/09/2006 13:30 |
21/09/2006 02:00 |
2 |
15/09/2006 19:30 |
16/09/2006 00:00 |
3 |
18/09/2006 00:00 |
18/09/2006 08:00 |
4 |
18/09/2006 01:30 |
18/09/2006 09:30 |
These periods fall on the outbound legs
of orbits 953 to 957
The only period in which all four payloads will be switched off
simultaneously is 19:30 to 24:00 on 15 September.
This period is shown on the appropriate Bryant plots.
The other periods are not displayed on the Bryant plots (the plotting
software does not have the capability to handle these periods).
Attitude manoeuvres, October 2006
Manoeuvres to maintain the attitude and spin of the Cluster spacecraft
within the required limits (with respect to the Sun) will take place
in October 2006:
16 Oct, 18:30 (sc 2)
16 Oct, 21:00 (sc 1)
17 Oct, 08:30 (sc 3)
17 Oct, 15:30 (sc 4)
These all fall during orbit 969.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking from 1 hour before each
manoeuvre until several hours after the manoeuvre period and the
instruments sensitive to manoeuvres will
be switched on at least 8 hours after the manoeuvre period.
This restriction is
required to allow time to protect
those instruments that are sensitive to gases released during the
manoeuvres.
Given the dispersion of manoeuvre times,
each payload will put separately into its manoeuvre safe modes (i.e. there
will be no coordinated payload-off periods). This means that,
at any time during the manoeuvre period,
there will be two, and often three, payloads operating.
This approach also ensures clean operation of FGM extended mode during
payload-off periods, because the off period on each spacecraft is
limited to about 8 hours.
As no coordinated payload-off periods are planned there will be no
adjustments to BM1 periods.
No trim manoeuvres are planned as phasing manoeuvres will take place
during November.
Phasing manoeuvres, November/December 2006
Manoeuvres to adjust the separation of the Cluster spacecraft
will take place
during during four periods in November and December 2006 as follows:
01 Nov, 19:18 to 22:48 (drift start manoeuvres, around perigee of orbit 976)
23 Nov, 04:41 to 06:38 (drift stop manoeuvre, around perigee of orbit 985)
30 Nov, 08:53 to 09:56 (trim manoeuvre, around perigee of orbit 988)
07 Dec, 11:20 to 13.10 (trim manoeuvre, around perigee of orbit 991)
There will be no science data-taking for a period around each
manoeuvre as many instruments have to be switched into safe modes during
so they are not damaged by gases released during the manoeuvres.
Given the closeness of manoeuvre times,
these payload switch-offs will be coordinated into periods
covering manoeuvres on all four spacecraft as shown in the table below.
The no-data-taking period will be balanced by additional burst mode away
from the manoeuvre period.
Date | Payload off | Additional BM1 |
01 Nov | 18:18 to 05:48 | 2.2 hrs at outbound magnetopause
on orbit 976 |
23 Nov | 03:41 to 13:38 | 1.8 hrs at inbound
magnetopause on orbit 984 |
30 Nov | 07:53 to 16:56 | 1.8 hrs at inbound
magnetopause on orbit 987 |
07 Dec | 10:20 to 20:10 | 1.8 hrs at inbound
magnetopause on orbit 991 |
Attitude manoeuvres, January 2007
Manoeuvres to maintain the attitude and spin of the Cluster spacecraft
within the required limits (with respect to the Sun) will take place
in January 2007:
11 Jan, 10:45 (sc 3)
11 Jan, 12:35 (sc 1)
11 Jan, 14:45 (sc 2)
11 Jan, 16:35 (sc 4)
These all fall during orbit 1005.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking from 1 hour before the
first manoeuvre until seven hours after the last manoeuvre. The
instruments sensitive to manoeuvres will
be switched on at least 8 hours after the manoeuvre period.
The no-data-taking period will be balanced by additional burst mode away
from the manoeuvre period (2.7 hours at the inbound bow shock on orbit
1003).
Trim manoeuvres are planned to take place around 08:00 on 19 January
(perigee of orbit 1009).
There will be a similar no-data-taking period around these manoeuvres.
This will be balanced by additional burst mode away
from the manoeuvre period (1.4 hours at inbound magnetopause on
orbit 1010).
Attitude manoeuvres, April 2007
Manoeuvres to maintain the attitude and spin of the Cluster spacecraft
within the required limits (with respect to the Sun) will take place
in April 2007:
18 Apr, 09:30 (sc 2)
18 Apr, 10:00 (sc 4)
18 Apr, 11:00 (sc 1)
18 Apr, 11:30 (sc 3)
These all fall during orbit 1046.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking from 30 minutes before the
first manoeuvre until six hours after the last manoeuvre. The
instruments sensitive to manoeuvres will
be switched on at least 8 hours after the manoeuvre period.
The no-data-taking period will be balanced by additional burst mode away
from the manoeuvre period (1.5 hours at outbound magnetopause of orbit 1046).
No trim manoeuvres are planned as the Cluster phasing manoeuvres
will follow soon after (end of May).
Phasing manoeuvres, May/July 2007
Manoeuvres to adjust the separation of the Cluster spacecraft
will take place
during during four periods in May to July 2007 as follows:
25 May, 10:20 to 17:10 (drift start manoeuvres, around perigee of orbit 1062
)
20 June, 10:18 to 14:39 (drift stop manoeuvre, around perigee of orbit 1073)
27 June, 13:40 to 17:50 (trim manoeuvre, around perigee of orbit 1076)
04 July, 17:04 to 21:06 (trim manoeuvre, around perigee of orbit 1079)
The drift manoeuvres will affect only spacecraft 1, 2 and 3 - while the trim man
oeuvres will affect
all four spacecraft.
To reduce the risk of collision during the manoeuvres,
spacecraft 3 will have two additional manoeuvres on 24 May
at 04:23 and 22:19.
To aid long-term planning we allow a margin on the time of each manoeuvres. T
his
is typically 10 minutes, but in a few cases on spacecraft 3 we allow larger marg
ins:
the two additional manoeuvres on 24 May have 2 hours margin, while the 25 May
manoeuvre has 1 hour margin.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking from 1 hour before each
manoeuvre until several hours after the manoeuvre period and the
instruments sensitive to manoeuvres will
be switched on at least 8 hours after the manoeuvre period.
These periods are shown on the appropriate Bryant plots.
To balance this loss of data-taking, the BM1 periods have been adjusted as
follows:
BM1 at outbound bow shock on orbit 1062 extended from 2.5 to 4.0 hours.
BM1 at outbound magnetopause on orbit 1072 extended from 2.5 to 4.0 hours.
added 1 hr BM1 at inbound magnetopause on orbit 1073
added 1.5 hr BM1 at perigee (sc3/4) of orbit 1075
added 0.9 hr BM1 at inbound magnetopause on orbit 1076
added 2.4 hr BM1 at inbound magnetopause on orbit 1078
Note that the restriction of payload operations around the
manoeuvres is
required to allow time for configuration of the spacecraft and to protect
those instruments that are sensitive to gases released during the
manoeuvres.
Attitude manoeuvres, July 2007
Manoeuvres to maintain the attitude and spin of the Cluster spacecraft
within the required limits (with respect to the Sun) will take place
in July 2007:
25 July, 06:30 (sc 1)
25 July, 12:00 (sc 2)
25 July, 13:00 (sc 3)
25 July, 14:30 (sc 4)
These all fall during orbit 1087.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking on each spacecraft
for a period around its manoeuvre time. The instruments sensitive to manoeuvres
will
remain in their safe modes until at least 8 hours after the manoeuvre period.
The no-data-taking period will be balanced by additional burst mode away
from the manoeuvre period (1 hour at the perigee of orbit 1088).
As the sc1 manoeuvre is
well-separated in time this has a separate no data-taking period from 05:15 to 09:30.
The closely space manoeuvres on sc2, 3 and 4 will have a common no data-taking period
from 11:15 to 19:25. This approach reduces the complexity of the commanding while
retaining a scheduled WBD MSO operation from 09:46 to 11:39.
Trim manoeuvres are planned as follows:
2 Aug, 08:30 (sc 2)
2 Aug, 10:30 (sc 1)
2 Aug, 16:00 (sc 4)
2 Aug, 17:00 (sc 3)
These all fall around the perigee of orbit 1091.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking on each spacecraft
for a period around its manoeuvre time. The instruments sensitive to manoeuvres
will
remain in their safe modes until at least 8 hours after the manoeuvre period.
The no-data-taking period will be balanced by additional burst mode away
from the manoeuvre period (3 hours rather than 1.5 hours at the plasmasheet
crossing on orbit 1091).
As the manoeuvres fall naturally in two pairs, there will be two separate
no-data-taking
periods: (a) 07:15 to 15:55 for sc 1 and 2; and (b) 14:45 to 23:25 for sc 3 and
4.
This approach reduces the complexity of the commanding while avoiding a very
long no-data-taking period.
Long eclipses 2007
The Cluster spacecraft will experience a series of umbral eclipses
in mid-September 2007. There will not be enough power to operate
the payloads in these periods, so they will
switched off as shown in the table below.
(Type NOF indicates that FGM will remain powered on and may collect low-resolution data;
type ALL indicates that all instruments are powered off.)
Due to the latest power constraints the SSRs will be emptied before
each eclipse. Thus
no burst mode adjustment will be made to balance the no-data-taking
periods (as was the practice in long eclipse seasons of 2001-2005).
Given the absence of burst mode balancing, the payload off periods
have not been consolidated to focus on 3 or 4 spacecraft operations
(as was also done in previous seasons). The payload off periods are restricted
to those requested by ESOC.
Spacecraft |
Payload off |
Payload on |
Type |
2 |
14/09/2007 06:00 |
15/09/2007 01:00 |
NOF |
2 |
16/09/2007 14:00 |
17/09/2007 08:00 |
NOF |
4 |
16/09/2007 19:00 |
17/09/2007 08:00 |
NOF |
3 |
16/09/2007 22:30 |
17/09/2007 08:00 |
NOF |
3 |
19/09/2007 01:00
|
19/09/2007 18:00
|
ALL |
4 |
19/09/2007 01:00
|
19/09/2007 18:00
|
NOF |
2 |
19/09/2007 05:00
|
19/09/2007 12:00
|
NOF |
1 |
21/09/2007 06:00
|
29/09/2007 02:00
|
ALL |
3 |
21/09/2007 11:00
|
22/09/2007 02:00
|
ALL |
4 |
21/09/2007 11:00
|
22/09/2007 02:00
|
NOF |
4 |
23/09/2007 22:00
|
24/09/2007 11:00
|
NOF |
3 |
24/09/2007 00:00
|
24/09/2007 11:00
|
NOF |
These periods fall on the outbound legs
of orbits 1109 to 1113, except for the long off-period on
spacecraft 1.
This starts late on orbit 1111, spans all of orbits 1112 to 1114
and ends on the outbound leg of orbit 1115.
There are no periods when all four payloads are switched off simultaneously.
Thus no gaps are displayed on the Bryant plots (the plotting
software does not have the capability to handle the the individual
payload-off periods).
Attitude manoeuvres, October 2007
Manoeuvres to maintain the attitude and spin of the Cluster spacecraft
within the required limits (with respect to the Sun) will take place
in October 2007:
24 October, 18:00 (sc 2)
24 October, 19:30 (sc 3)
24 October, 21:00 (sc 4)
24 October, 23:00 (sc 1)
These all fall during orbit 1126.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking on each spacecraft
for a period around its manoeuvre time:
on spacecraft 2 from 16;50 to 18:20
on all four spacecraft from 18:20 to 21:00
on spacecraft 1 and 4 from 21:00 to 22:00
on spacecraft 1 from 22:00 to 24:00
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre period.
The 4-spacecraft no-data-taking period will be balanced by additional
burst mode away from the manoeuvre period
(BM at the plasmasheet crossing in orbit 1126 extended from 3.5 to 3.9 hrs).
Trim manoeuvres are not planned as the orbit phasing manoeuvres will
follow shortly.
Phasing manoeuvres, October/November/December 2007
A series of manoeuvres to adjust the separation of the Cluster spacecraft
will take place between late October and mid-December 2007.
The manoeuvre times and durations are shown below; a blank entry indicates
where the duration time is not yet known and as it is dependent on the
performance of earlier manouevres.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking on each spacecraft
for a period around each of its manoeuvre times. See the notes below
for details. Four-spacecraft off periods are given in a separate table
below.
During the manoeuvres on 10 November, data-taking will continue on all four spacecraft
to allow FGM and WEC measurements on all spacecraft while Rosetta is in the far tail region.
Sc | Manoeuvre start | Duration (s) | Notes |
4 | 2007-10-30T18:48:49Z | 6128.1 |
No data 17:38 to 03:40 |
2 | 2007-11-02T06:00:00Z | 5420.84 |
No data 04:50 to 14:40 |
1 | 2007-11-04T13:18:44Z | 4119.17 |
No data 12:08 to 21:37 |
3 | 2007-11-04T14:25:00Z | 5751.2 |
No data 13:15 to 23:10 |
3 | 2007-11-05T15:23:00Z | 1197.47 |
No data 14:13 to 22:52 |
4 | 2007-11-08T03:02:33Z | 1713.5 |
No data 01:52 to 10:41 |
3 | 2007-11-10T08:55:21Z | 18.74 |
4 s/c remain on - Rosetta in far tail |
1 | 2007-11-10T09:58:34Z | 1301.88 |
4 s/c remain on - Rosetta in far tail |
2 | 2007-11-10T10:55:27Z | 1561.35 |
4 s/c remain on - Rosetta in far tail |
4 | 2007-11-16T10:39:13Z | 5804.83 |
4 s/c off |
1 | 2007-11-16T12:20:00Z | 4362.15 |
4 s/c off |
2 | 2007-11-16T13:40:00Z | 3877.68 |
4 s/c off |
3 | 2007-11-18T17:44:51Z | 5570.06 |
No data 16:34 to 02:27 |
3 | 2007-11-22T05:22:29Z | 223.91 |
4 s/c off |
1 | 2007-11-22T05:47:48Z | 18.32 |
4 s/c off |
4 | 2007-11-22T06:31:42Z | 23.2 |
4 s/c off |
2 | 2007-11-22T06:51:04Z | 19.32 |
4 s/c off |
1 | 2007-11-23T14:50:13Z | 146.55 |
4 s/c off |
4 | 2007-11-23T14:51:20Z | 212.62 |
4 s/c off |
2 | 2007-11-23T16:15:08Z | 173.89 |
4 s/c off |
3 | 2007-11-23T18:12:16Z | 149.24 |
4 s/c off |
3 | 2007-11-28T22:09:26Z | |
No data 12:09 28 Nov to 05:57 1 Dec - spans 4 s/c off on 29 Nov |
1 | 2007-11-29T09:04:19Z | 3.66 |
4 s/c off |
4 | 2007-11-29T09:44:30Z | 3.87 |
4 s/c off |
2 | 2007-11-29T10:02:57Z | 3.86 |
4 s/c off |
3 | 2007-11-29T19:57:27Z | |
No data 12:09 28 Nov to 05:57 1 Dec - spans 4 s/c off on 29 Nov |
3 | 2007-12-04T03:56:25Z | 223.84 |
No data 02:46 to 11:10 |
1 | 2007-12-06T12:23:54Z | |
4 s/c off |
4 | 2007-12-06T13:01:22Z | |
4 s/c off |
2 | 2007-12-06T13:18:39Z | |
4 s/c off |
3 | 2007-12-08T22:05:44Z | 179.42 |
No data 20:55 to 05:18 |
3 | 2007-12-13T16:14:02Z | 180.59 |
No data 15:04 to 23:27 |
In cases where three payloads are simultaneously in no data-taking
modes, we stop data-taking on all spacecraft. This allows us to balance
the data-taking at MSP level by adding extra burst mode as shown in
the table below.
No-data-taking start | No-data-taking end |
Extra BM |
2007-11-16T09:29:00Z |
2007-11-16T21:54:00Z |
2.4 hours BM at inbound magnetopause on orbit 1133 |
2007-11-22T04:12:00Z |
2007-11-22T14:01:00Z |
4.1 hours BM at outbound magnetopause on orbit 1138 |
2007-11-23T13:40:00Z |
2007-11-24T01:24:00Z |
as above |
2007-11-29T07:54:00Z |
2007-11-29T17:13:00Z |
tbd |
2007-12-06T11:13:00Z |
2007-12-06T20:28:00Z |
tbd |
Attitude manoeuvres, January 2008
Manoeuvres to maintain the attitude and spin of the Cluster spacecraft
within the required limits (with respect to the Sun) will take place
in January 2008:
28 January, 12:00 (sc 2)
28 January, 13:30 (sc 3)
28 January, 15:00 (sc 4)
28 January, 16:30 (sc 1)
These all fall during orbit 1166.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking on each spacecraft
from 11:45 to 23:30 on 28 January.
This no-data-taking period will be balanced by additional
burst mode (2.3h) at the outbound magnetopause on orbit 1168.
Trim manoeuvres are planned on all four spacecraft at 15:00 on 4 February.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking on each spacecraft
from 14:45 to 22:00 on 4 February.
This no-data-taking period will be balanced by additional
burst mode (1.3h) at the inbound bow shock on orbit 1169.
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre period.
Attitude and tilt manoeuvres, April-May 2008
Manoeuvres to maintain the attitude and spin of the Cluster spacecraft
within the required limits (with respect to the Sun) will take place
in April 2008:
25 April, 09:00 (sc 3)
25 April, 10:30 (sc 4)
25 April, 12:00 (sc 1)
25 April, 13:00 (sc 2)
These all fall early in orbit 1203.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking on each spacecraft
from 08:00 to 15:00 on 25 April.
This no-data-taking period will be balanced by additional
burst mode (1.2h) at the apogee of orbit 1203.
Following these manoeuvres there will be a series of manoeuvres to alter the
tilt of spacecraft 3 in order to study the effect of spacecraft orientation on
measurements. These will be complemented by trim manoeuvres to keep spacecraft 3
close to spacecraft 4. These manoeuvres are as follows:
Time | Manoeuvre type |
2008-04-28T08:00:00Z | Tilt |
2008-04-30T21:00:00Z | Trim |
2008-05-07T23:30:00Z | Trim |
2008-05-14T08:00:00Z | Tilt |
2008-05-19T22:00:00Z | Trim |
2008-05-30T08:00:00Z | Tilt |
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking on spacecraft 3 for
several hours around each manoeuvre, typically from one hour before
the manoeuvre to 7 hours after the manoeuvre.
There will be no trim manoeuvres on the other spacecraft.
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre period.
Orbit phasing and attitude manoeuvres, Jul-Aug 2008
A series of manoeuvres to adjust the separation and attitude
of the Cluster spacecraft
will take place in June to August 2008.
The manoeuvre times and durations are shown below.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking for
several hours around each manoeuvre, typically from one hour before
the manoeuvre to 7 hours after the manoeuvre.
Note that we stop data-taking on all s/c even if there are manoeuvres
on only three spacecraft.
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre period.
Drift start manoeuvres
11 June, 11:18 (sc 2)
11 June, 11:31 (sc 3)
11 June, 11:56 (sc 1)
No data-taking from 11 June 09:38 to 11 June 19:11
Trim manoeuvres
18 June, 13:30 (sc 2)
18 June, 14:00 (sc 3)
18 June, 14:15 (sc 1)
No data-taking from 18 June 12:15 to 18 June 21:30
Drift stop manoeuvres
28 July, 22:02 (sc 2)
28 July, 22:43 (sc 1)
28 July, 23:42 (sc 3)
No data-taking from 28 July 20:47 to 29 July 06:57
Attitude manoeuvres
30 July, 12:30 (sc 2)
30 July, 13:30 (sc 1)
30 July, 14:30 (sc 3)
30 July, 15:30 (sc 4)
No data-taking from 30 July 11:45 to 30 July 22:45
Trim manoeuvres
02 August, 16:18 (sc 2)
02 August, 16:58 (sc 1)
02 August, 17:58 (sc 3)
02 August, 18:52 (sc 4)
No data-taking from 02 August 15:03 to 02 August 02:07
Trim manoeuvres
09 August, 19:44 (sc 2)
09 August, 20:22 (sc 1)
09 August, 21:19 (sc 3)
09 August, 22:14 (sc 4)
No data-taking from 09 August 18:29 to 10 August 00:00
Long eclipses 2008
The Cluster spacecraft will experience a series of umbral eclipses between 19 September and 10 October 2008.
There will not be enough power to
operate
the payloads in these periods, so they will
switched off as shown in the table below.
Type NOF indicates that FGM will remain powered on and may collect
low-resolution data;
type ALL indicates that all active instruments are powered off
(note that ASPOC is no longer active and will remain switched off).
There is also a short penumbral eclipse on spacecraft 2 on 17 September (08:03
to 08:51); payload operations will continue during this eclipse.
EDI is an exception to this plan. The EDI instrument on each
spacecraft will be powered off at the start of long eclipses
for that spacecraft. It will be re-started under manual control by
ESOC after the end of long eclipses on each spacecraft. See the EDI status
column in the table.
Due to the latest power constraints the SSRs will be emptied before
each eclipse. Thus
no burst mode adjustment will be made to balance the no-data-taking
periods (as was the practice in long eclipse seasons of 2001-2005).
Given the absence of burst mode balancing, the payload off periods
have not been consolidated to focus on 3 or 4 spacecraft operations
(as was also done in previous seasons). The payload off periods are restricted
to those requested by ESOC.
Spacecraft |
Payload off |
Payload on |
Type |
EDI status |
2 |
19/09/2008 07:42 |
20/09/2008 00:31 |
NOF |
Off at payload off |
2 |
21/09/2008 16:12 |
22/09/2008 09:21 |
NOF |
|
2 |
24/09/2008 00:58 |
24/09/2008 17:51 |
NOF |
|
3 |
24/09/2008 05:19 |
24/09/2008 17:51 |
NOF |
Off at payload off |
4 |
24/09/2008 05:19 |
24/09/2008 17:51 |
NOF |
Off at payload off |
2 |
26/09/2008 09:43 |
26/09/2008 21:04 |
NOF |
Restart after payload on |
3 |
26/09/2008 09:43 |
27/09/2008 02:42 |
ALL |
|
4 |
26/09/2008 09:43 |
27/09/2008 02:42 |
ALL |
|
1 |
28/09/2008 18:23 |
29/09/2008 12:00 |
ALL |
Off at payload off |
3 |
28/09/2008 18:23 |
29/09/2008 12:00 |
ALL |
|
4 |
28/09/2008 18:23 |
29/09/2008 12:00 |
ALL |
|
1 |
01/10/2008 03:10 |
01/10/2008 20:26 |
ALL |
|
3 |
01/10/2008 03:10 |
01/10/2008 20:26 |
ALL |
|
4 |
01/10/2008 03:10 |
01/10/2008 20:26 |
ALL |
|
1 |
03/10/2008 12:05 |
04/10/2008 05:08 |
ALL |
|
3 |
03/10/2008 12:05 |
04/10/2008 05:08 |
ALL |
|
4 |
03/10/2008 12:05 |
04/10/2008 05:08 |
NOF |
|
1 |
05/10/2008 21:17 |
06/10/2008 13:42 |
ALL |
|
3 |
06/10/2008 03:10 |
06/10/2008 08:06 |
NOF |
Restart after payload on |
4 |
06/10/2008 03:10 |
06/10/2008 08:06 |
NOF |
Restart after payload on |
1 |
08/10/2008 06:14 |
08/10/2008 22:08 |
ALL |
|
1 |
10/10/2008 17:21 |
11/10/2008 03:26 |
ALL |
Restart after payload on |
These periods fall on orbits 1265 to 1274. They typically start a few
hours before perigee and end around 15 hours after perigee - as shown in
the figure below.
Thus the payload off periods cover the perigee region,
the interior cusp crossings (close to
perigee) and the plasmasheet crossings. To illustrate this, the time of the
Cluster 1 neutral sheet crossings (NS) is also shown in the figure.
There are no periods when all four payloads are switched off simultaneously.
Thus no gaps are displayed on the Bryant plots (the plotting
software does not have the capability to handle the the individual
payload-off periods).
Orbit phasing and attitude manoeuvres, Nov-Dec 2008
A series of manoeuvres to adjust the separation and attitude
of the Cluster spacecraft
will take place in November and December 2008.
The manoeuvre times and durations are shown below.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking for
several hours around each manoeuvre, typically from one hour before
the manoeuvre to 7 hours after the manoeuvre.
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre period.
Drift start manoeuvres
10 Nov, 16:09 (sc 2)
10 Nov, 16:21 (sc 1)
10 Nov, 16:40 (sc 3)
No data-taking on all s/c from 10 Nov 14:59 to 10 Nov 23:52
Attitude manoeuvres
11 Nov, 12:00 (sc 1)
11 Nov, 13:30 (sc 2)
11 Nov, 15:00 (sc 3)
11 Nov, 16:30 (sc 3)
No data-taking on all s/c from 11 Nov 10:50 to 11 Nov 23:52
Additional drift manoeuvre
15 Nov, 11:38 (sc 3)
No data-taking on s/c 3 from 15 Nov 10:28 to 15 Nov 17:59
Drift stop/trim manoeuvres
27 Nov, 08:43 (sc 4)
27 Nov, 09:05 (sc 1)
27 Nov, 09:08 (sc 2)
27 Nov, 11:52 (sc 3)
No data-taking on all s/c from 27 Nov 07:33 to 27 Nov 19:09
Trim manoeuvres
02 Dec, 02:47 (sc 1)
02 Dec, 02:51 (sc 2)
02 Dec, 05:34 (sc 3)
No data-taking on all s/c from 02 Dec 01:37 to 02 Dec 12:45
Trim manoeuvres
06 Dec, 20:58 (sc 1)
06 Dec, 21:03 (sc 4)
06 Dec, 21:03 (sc 2)
06 Dec, 23:45 (sc 3)
No data-taking on all s/c from 06 Dec 19:48 to 07 Dec 06:56
Trim manoeuvres
11 Dec, 15:08 (sc 1)
11 Dec, 15:13 (sc 2)
11 Dec, 17:55 (sc 3)
No data-taking on all s/c from 11 Dec 13:58 to 12 Dec 01:06
In six out of seven cases above, we have closely-spaced manoeuvres on 3 or 4 spacecraft. In
these
cases we stop data-taking on all four spacecraft. This is then balanced by additional burst
mode at other times. See the MSP for this period.
Lunar eclipse, 28 December 2008
The Cluster 1, 2 and 4 spacecraft will experience lunar eclipses on
28 December 2008:
In the case of spacecraft 1 there will not be enough power to
operate the payload between 15:37 and 17:35.
So the active instruments will either be switched off (CIS, FGM, PEACE and WEC)
or put in standby mode (EDI and RAPID) for this period. The use of standby
mode avoids the risk that instrument patches have to be reloaded.
In addition, the HPA shall be switched off from 15:46 to
17:27, so no WBD passes will be possible during that period.
In the case of spacecraft 2, science data-taking will continue as normal
for a short eclipse case.
In the case of spacecraft 3, there is no eclipse, so science data-taking
will continue as normal.
In the case of spacecraft 4, science data-taking will continue as normal
for a short eclipse case. But the HPA shall be switched off from 15:19 to
16:56, so no WBD passes will be possible during that period.
Attitude manoeuvres, Feb 2009
A series of manoeuvres to adjust the separation and attitude
of the Cluster spacecraft
will take place in February 2009.
The manoeuvre times and durations are shown below.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking for
several hours around each manoeuvre, typically from one hour before
the manoeuvre to 7 hours after the manoeuvre.
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre period.
Attitude manoeuvres
05 Feb, 14:30 (sc 1)
05 Feb, 13:30 (sc 2)
05 Feb, 11:30 (sc 3)
05 Feb, 12:30 (sc 4)
No data-taking on all s/c from 05 Feb 10:30 to 05 Feb 21:30
Trim manoeuvres
11 Feb, 11:55 (sc 1)
11 Feb, 11:56 (sc 2)
11 Feb, 14:43 (sc 3)
11 Feb, 12:01 (sc 4)
No data-taking on all s/c from 11 Feb 10:55 to 11 Feb 15:33
In both cases above, we have closely-spaced manoeuvres on 3 or 4 spacecraft.
Thus we stop data-taking on all four spacecraft.
This is then balanced by additional burst
mode at other times. See the MSP for this period.
Short eclipses, Feb to May 2009
The Cluster spacecraft will experience a series of short eclipses on 37 orbit
s
between 16 February and 12 May 2009. During some of these eclipses there will no
t
be enough power to operate the payloads on spacecraft 1, 3 and 4. Thus the paylo
ads
on these spacecraft will switched off or placed in standby. The payload on space
craft 2
will operate through the eclipse season.
The payload off periods for spacecraft 1, 3 and 4 are shown in the table bel
ow. During
these periods there will be no data-taking and four of the instruments (CIS, FGM
, PEACE and WEC)
will be switched off. The handling of the other two instruments (EDI and RAPID)
will be more complex:
(a) EDI on s/c 1 will switched off for the duration of the eclipse season, (b) R
APID on s/c 1 will
be switched off during each period as for the four instruments, and (c) EDI and
RAPID on s/c 3 and 4
will be placed in standby mode during the nominal off period. The standby mode
is used in order to preserve
instrument patches.
Update 15 March: C3 off/on times updated from 12 April onwards; this
reflects changed manoeuvre timeline in response to the Herschel-Planck
launch
Eclipse |
C1 off |
C1 on |
C3 off |
C3 on |
C4 off |
C4 on |
5 |
25 Feb, 16:15 |
25 Feb, 21:30 |
- |
- |
- |
- |
6 |
28 Feb, 01:30 |
28 Feb, 08:00 |
28 Feb, 06:02 |
28 Feb, 06:40 |
- |
- |
7 |
02 Mar, 07:15 |
02 Mar, 16:00 |
02 Mar, 15:06 |
02 Mar, 15:46 |
- |
- |
8 |
04 Mar, 19:30 |
05 Mar, 04:00 |
05 Mar, 00:09 |
05 Mar, 00:51 |
- |
- |
9 |
07 Mar, 03:00 |
07 Mar, 11:30 |
- |
- |
- |
- |
10 |
09 Mar, 13:30 |
09 Mar, 19:00 |
- |
- |
- |
- |
11 |
11 Mar, 22:30 |
12 Mar, 06:00 |
- |
- |
- |
- |
12 |
14 Mar, 05:30 |
14 Mar, 13:30 |
- |
- |
- |
- |
13 |
16 Mar, 17:00 |
17 Mar, 02:00 |
16 Mar, 21:35 |
16 Mar, 22:23 |
16 Mar, 18:52 |
16 Mar, 19:40 |
14 |
19 Mar, 01:00 |
19 Mar, 09:00 |
19 Mar, 03:30 |
19 Mar, 11:30 |
19 Mar, 03:56 |
19 Mar, 04:44 |
15 |
21 Mar, 07:30 |
21 Mar, 16:30 |
21 Mar, 13:00 |
21 Mar, 19:30 |
21 Mar, 13:00 |
21 Mar, 13:49 |
16 |
23 Mar, 17:30 |
24 Mar, 04:15 |
24 Mar, 00:49 |
24 Mar, 01:39 |
23 Mar, 22:06 |
23 Mar, 22:55 |
17 |
26 Mar, 03:30 |
26 Mar, 11:30 |
26 Mar, 09:55 |
26 Mar, 10:46 |
26 Mar, 07:12 |
26 Mar, 08:02 |
18 |
28 Mar, 14:00 |
28 Mar, 20:00 |
28 Mar, 19:01 |
28 Mar, 19:51 |
28 Mar, 16:17 |
28 Mar, 17:08 |
19 |
30 Mar, 22:45 |
31 Mar, 06:15 |
31 Mar, 04:05 |
31 Mar, 04:56 |
31 Mar, 01:21 |
31 Mar, 02:12 |
20 |
02 Apr, 06:00 |
02 Apr, 14:30 |
02 Apr, 08:00 |
02 Apr, 17:00 |
02 Apr, 10:25 |
02 Apr, 11:17 |
21 |
04 Apr, 16:00 |
05 Apr, 01:30 |
04 Apr, 17:30 |
05 Apr, 03:00 |
04 Apr, 19:31 |
04 Apr, 20:23 |
22 |
07 Apr, 01:15 |
07 Apr, 09:30 |
07 Apr, 03:15 |
07 Apr, 11:30 |
07 Apr, 04:37 |
07 Apr, 05:29 |
23 |
09 Apr, 11:30 |
09 Apr, 17:30 |
09 Apr, 16:26 |
09 Apr, 17:18 |
09 Apr, 13:43 |
09 Apr, 14:35 |
24 |
11 Apr, 21:00 |
12 Apr, 04:00 |
12 Apr, 01:20 |
12 Apr, 02:12 |
11 Apr, 22:48 |
11 Apr, 23:40 |
25 |
14 Apr, 04:00 |
14 Apr, 12:00 |
14 Apr, 10:13 |
14 Apr, 11:04 |
14 Apr, 07:52 |
14 Apr, 08:44 |
26 |
16 Apr, 15:30 |
17 Apr, 00:00 |
16 Apr, 17:00 |
17 Apr, 00:30 |
16 Apr, 16:56 |
16 Apr, 17:48 |
27 |
18 Apr, 21:30 |
19 Apr, 07:00 |
18 Apr, 22:30 |
19 Apr, 08:30 |
19 Apr, 02:01 |
19 Apr, 02:52 |
28 |
21 Apr, 07:00 |
21 Apr, 15:00 |
21 Apr, 08:45 |
21 Apr, 16:45 |
21 Apr, 11:07 |
21 Apr, 11:58 |
29 |
23 Apr, 18:15 |
24 Apr, 01:45 |
23 Apr, 21:48 |
23 Apr, 22:38 |
23 Apr, 20:13 |
23 Apr, 21:03 |
30 |
26 Apr, 02:00 |
26 Apr, 09:30 |
26 Apr, 06:41 |
26 Apr, 07:30 |
26 Apr, 05:18 |
26 Apr, 06:07 |
31 |
28 Apr, 12:30 |
28 Apr, 18:00 |
28 Apr, 15:34 |
28 Apr, 16:21 |
28 Apr, 14:22 |
28 Apr, 15:10 |
32 |
30 Apr, 21:00 |
01 May, 07:00 |
01 May, 00:27 |
01 May, 01:13 |
30 Apr, 23:28 |
01 May, 00:14 |
33 |
02 May, 05:30 |
03 May, 12:30 |
03 May, 09:22 |
03 May, 10:06 |
- |
- |
34 |
05 May, 15:30 |
06 May, 00:00 |
05 May, 18:18 |
05 May, 18:59 |
- |
- |
35 |
07 May, 23:30 |
08 May, 07:30 |
08 May, 03:13 |
08 May, 03:51 |
- |
- |
36 |
10 May, 10:00 |
10 May, 16:00 |
10 May, 12:09 |
10 May, 12:41 |
- |
- |
37 |
12 May, 19:00 |
13 May, 06:30 |
- |
- |
- |
- |
Orbit phasing manoeuvres, April/May 2009
A series of manoeuvres to bring the Cluster-3 spacecraft closer to its sister spacecraft
will take place in April and May 2009.
The manoeuvre times are shown below.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking for
several hours around each manoeuvre, typically from one hour before
the manoeuvre to 7 hours after the manoeuvre.
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre period.
Orbit drift start manoeuvre
09 Apr, 15:30 (sc 3)
Eclipse constraints require payload switch-off at 16:27. For simplicity of implementation,
the manoeuvre protection is achieved by advancing payload switch-off to 14:30 (one hour before
the manoeuvre).
This manoeuvre was originally planned for 16 April, but was advanced to
avoid any possible overlap with the Herschel-Planck launch.
Trim manoeuvre
21 Apr, 09:15 (sc 3)
Eclipse constraints require payload switch-off at 09:00. For simplicity of implementation,
the manoeuvre protection is achieved by advancing payload switch-off to 08:15 (one hour before
the manoeuvre).
Orbit drift stop manoeuvre
12 May, 21:34 (sc 3)
No data-taking on C3 from 20:34 to 04:36.
Trim manoeuvre
27 May, 06:47 (sc 3)
No data-taking on C3 from 05:47 to 13:47.
In all cases above, we have manoeuvres on a single spacecraft.
Thus we continue data-taking on the other spacecraft, subject to their own eclipse constraints,
and do not balance the lost data-taking by additional burst mode at other times.
Attitude manoeuvres
15 May, 11:00 (sc 1)
15 May, 12:00 (sc 2)
15 May, 13:00 (sc 3)
15 May, 14:00 (sc 4)
To minimise impact on plans for WBD operations, we will stop data-taking
in a phased manner: at 10:40 on C1, at 11:40 on C2, at 12:40 on C3 and
at 13:40 on C4. Data-taking will resume simultaneously on all spacecraft
at 18:00. This gives a common-off period from 13:40 to 18:00; this is
balanced by extending the magnetopause BM1 period on 10 May.
Post-eclipse trim manoeuvres
20 May, 02:50 (sc 1)
20 May, 02:50 (sc 2)
20 May, 02:50 (sc 3)
20 May, 02:50 (sc 4)
No data-taking on all spacecraft from 01:50 to 07:00. The early
restart reduces impact on plans for WBD operations.
This common off-period is
balanced by extending the magnetopause BM1 period on 17 May.
Orbit phasing manoeuvres, July/August 2009
A series of manoeuvres to adjust the constellation
will take place in July and August 2009.
The manoeuvre times are shown below.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking for
several hours around each manoeuvre, typically from one hour before
the manoeuvre to 7 hours after the manoeuvre.
The no-data-taking period will sometimes end earlier in order to preserve WBD
operations already scheduled.
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre period.
Orbit drift start manoeuvre
01 July, 20:32 (sc 1)
01 July, 20:36 (sc 2)
01 July, 20:16 (sc 3)
No data-taking on all four spacecraft from 19:16 to 03:39. This is balanced by additional BM1
as shown in the Master Science Plan above.
Orbit drift stop manoeuvre
23 July, 04:58 (sc 1)
23 July, 04:10 (sc 2)
23 July, 06:31 (sc 3)
23 July, 06:03 (sc 4) - trim?
No data-taking on all four spacecraft from 03:09 to 13:03. This is balanced by additional BM1
as shown in the Master Science Plan above.
Trim manoeuvre
30 July, 08:21 (sc 1)
30 July, 07:31 (sc 2)
30 July, 09:31 (sc 3)
No data-taking on all four spacecraft from 06:30 to 10:00. This is balanced by additional BM1
as shown in the Master Science Plan above.
Trim manoeuvre
06 August, 11:38 (sc 1)
06 August, 10:50 (sc 2)
06 August, 12:46 (sc 3)
06 August, 12:38 (sc 4)
No data-taking on all four spacecraft from 09:54 to 13:51. This is balanced by additional BM1
as shown in the Master Science Plan above.
Trim manoeuvre
13 August, 14:59 (sc 1)
13 August, 14:14 (sc 2)
No data-taking on all four spacecraft from 13:13 to 20:51. This is balanced by additional BM1
as shown in the Master Science Plan above.
Attitude manoeuvres, Aug/Sep 2009
A series of manoeuvres to adjust the attitude
of the Cluster spacecraft
will take place in August and September 2009.
The manoeuvre times and durations are shown below.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking for
several hours around each manoeuvre, typically from one hour before
the manoeuvre to 7 hours after the manoeuvre.
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre period.
Attitude manoeuvres
28 Aug, 06:00 (sc 4)
28 Aug, 06:30 (sc 3)
28 Aug, 07:00 (sc 2)
28 Aug, 08:00 (sc 1)
No data-taking on all spacecraft from 05:15 to 15:00.
Trim manoeuvres
04 Sep, 00:55 (sc 1)
04 Sep, 00:15 (sc 2)
04 Sep, 01:55 (sc 3)
04 Sep, 01:50 (sc 4)
No data-taking on all spacecraft from 23:15 (3 Sep) to 08:55.
These two no data-taking periods are balanced by additional burst
mode at other times. See the MSP for this period.
Autumn eclipses, September to November 2009
The Cluster spacecraft will experience a series of eclipses on 22 orbits
between 28 September and 17 November 2009. During some of these eclipses there will not
be enough power to operate the payloads on some or all of the spacecraft. Thus the payloads
on the affected spacecraft will switched off as shown in the table below.
Eclipse |
C1 off |
C1 on |
C2 off |
C2 on |
C3 off |
C3 on |
C4 off |
C4 on |
1 |
- |
- |
28 Sep, 00:10 |
28 Sep, 03:00 |
- |
- |
- |
- |
2 |
- |
- |
30 Sep, 03:17 |
30 Sep, 17:28 |
- |
- |
- |
- |
3 |
- |
- |
02 Oct, 07:52 |
03 Oct, 02:25 |
- |
- |
- |
- |
4 |
- |
- |
04 Oct, 16:35 |
05 Oct, 11:45 |
- |
- |
- |
- |
5 |
- |
- |
07 Oct, 03:24 |
07 Oct, 19:52 |
- |
- |
- |
- |
6 |
- |
- |
09 Oct, 12:18 |
10 Oct, 04:30 |
09 Oct, 15:00 |
10 Oct, 04:30 |
09 Oct, 15:00 |
10 Oct, 04:30 |
7 |
- |
- |
11 Oct, 23:16 |
12 Oct, 14:00 |
12 Oct, 00:13 |
12 Oct, 14:00 |
12 Oct, 00:13 |
12 Oct, 14:00 |
8 |
14 Oct, 09:02 |
14 Oct, 21:45 |
14 Oct, 08:18 |
14 Oct, 21:45 |
14 Oct, 09:02 |
14 Oct, 21:45 |
14 Oct, 09:02 |
14 Oct, 21:45 |
9 |
16 Oct, 18:00 |
17 Oct, 07:47 |
16 Oct, 22:23 |
17 Oct, 01:18 |
16 Oct, 18:00 |
17 Oct, 07:47 |
16 Oct, 18:00 |
17 Oct, 07:47 |
10 |
19 Oct, 02:50 |
19 Oct, 17:00 |
- |
- |
19 Oct, 02:50 |
19 Oct, 17:00 |
19 Oct, 02:50 |
19 Oct, 17:00 |
11 |
21 Oct, 11:47 |
22 Oct, 01:31 |
- |
- |
21 Oct, 11:47 |
22 Oct, 01:31 |
21 Oct, 11:47 |
22 Oct, 01:31 |
12 |
23 Oct, 20:35 |
24 Oct, 12:00 |
- |
- |
23 Oct, 20:35 |
24 Oct, 12:00 |
23 Oct, 20:35 |
24 Oct, 12:00 |
13 |
26 Oct, 05:32 |
26 Oct, 19:15 |
- |
- |
26 Oct, 05:32 |
26 Oct, 19:15 |
26 Oct, 05:32 |
26 Oct, 19:15 |
14 |
28 Oct, 14:31 |
29 Oct, 02:30 |
- |
- |
28 Oct, 14:31 |
29 Oct, 02:30 |
28 Oct, 14:31 |
29 Oct, 02:30 |
15 |
31 Oct, 01:30 |
31 Oct, 16:00 |
- |
- |
31 Oct, 01:30 |
31 Oct, 16:00 |
31 Oct, 01:30 |
31 Oct, 16:00 |
16 |
02 Nov, 10:30 |
02 Nov, 21:00 |
- |
- |
02 Nov, 10:30 |
02 Nov, 21:00 |
02 Nov, 10:30 |
02 Nov, 21:00 |
17 |
04 Nov, 18:00 |
05 Nov, 04:30 |
- |
- |
04 Nov, 18:00 |
05 Nov, 04:30 |
04 Nov, 18:00 |
05 Nov, 04:30 |
18 |
07 Nov, 05:00 |
07 Nov, 15:00 |
- |
- |
07 Nov, 05:00 |
07 Nov, 15:00 |
07 Nov, 05:00 |
07 Nov, 15:00 |
19 |
09 Nov, 14:00 |
09 Nov, 23:00 |
- |
- |
09 Nov, 14:00 |
09 Nov, 23:00 |
09 Nov, 14:00 |
09 Nov, 23:00 |
20 |
11 Nov, 23:00 |
12 Nov, 07:00 |
- |
- |
11 Nov, 23:00 |
12 Nov, 07:00 |
11 Nov, 23:00 |
12 Nov, 07:00 |
21 |
14 Nov, 08:00 |
14 Nov, 16:15 |
- |
- |
14 Nov, 08:00 |
14 Nov, 16:15 |
14 Nov, 08:00 |
14 Nov, 16:15 |
22 |
16 Nov, 17:46 |
17 Nov, 00:07 |
- |
- |
16 Nov, 20:10 |
16 Nov, 22:17 |
16 Nov, 20:10 |
16 Nov, 22:17 |
Attitude, apogee lowering and orbit phasing manoeuvres, November/December 2009
A series of manoeuvres of the Cluster spacecraft will take place in November and December 2009.
These will:
Adjust the attitudes of the spacecraft to keep these within operational limits with respect to the Sun.
Lower the apogee to ensure that data can be downlinked throughout the orbit. This lowering, with no increase in peri
gee height,
will reduce the Cluster orbit period from 57.2 hours to 54.3 hours.
Adjust the spacecraft separation to address forthcoming science targets.
The manoeuvre times are shown below.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking for
several hours around each manoeuvre, typically from one hour before
the manoeuvre to 7 hours after the manoeuvre.
The no-data-taking period will sometimes end earlier in order to preserve WBD
operations already scheduled.
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre period.
Attitude Manoeuvres
19 Nov, 15:00 (sc 3)
19 Nov, 15:45 (sc 1)
19 Nov, 16:30 (sc 4)
19 Nov, 17:00 (sc 2)
No data-taking on all four spacecraft from 14:00 to 00:00. This is balanced by additional BM1
as shown in the Master Science Plan above.
Manoeuvre 1
21 Nov, 13:23 (sc 2)
21 Nov, 13:38 (sc 1)
21 Nov, 14:14 (sc 3)
21 Nov, 14:14 (sc 4)
No data-taking on all four spacecraft from 12:23 to 20:55. This is balanced by additional BM1
as shown in the Master Science Plan above.
Manoeuvre 2
26 Nov, 07:36 (sc 4)
No data-taking on spacecraft 4 from 06:36 to 15:02. There is no BM1 balancing as only one spacecraft
has no data-taking.
Manoeuvre 3
28 Nov, 14:03 (sc 1)
28 Nov, 14:09 (sc 3)
28 Nov, 14:10 (sc 2)
No data-taking on all four spacecraft from 13:03 to 21:05. This is balanced by additional BM1
as shown in the Master Science Plan above.
Manoeuvre 4
03 Dec, 02:56 (sc 1)
03 Dec, 02:57 (sc 4)
03 Dec, 03:00 (sc 2)
03 Dec, 03:00 (sc 3)
No data-taking on all four spacecraft from 01:56 to 10:01. This is balanced by additional BM1
as shown in the Master Science Plan above.
Manoeuvre 5
07 Dec, 15:31 (sc 1)
07 Dec, 15:33 (sc 4)
07 Dec, 15:36 (sc 2)
07 Dec, 15:36 (sc 3)
No data-taking on all four spacecraft from 14:31 to 22:37. This is balanced by additional BM1
as shown in the Master Science Plan above.
Manoeuvre 6
12 Dec, 05:58 (sc 3)
12 Dec, 06:02 (sc 4)
12 Dec, 06:14 (sc 1)
12 Dec, 05:36 (sc 2)
No data-taking on all four spacecraft from 05:35 to 14:36. This is balanced by additional BM1
as shown in the Master Science Plan above.
Attitude manoeuvres, January 2010
In January 2010, there will be a series of manoeuvres to adjust the attitudes of the spacecraft
to keep these within operational limits with respect to the Sun.
The manoeuvre times are shown below.
13 Jan, 15:00 (sc 2)
13 Jan, 15:45 (sc 3)
13 Jan, 16:30 (sc 4)
13 Jan, 17:15 (sc 1)
No data-taking on all four spacecraft from 14:00 to 00:15 (14 Jan). This is
balanced by additional BM1 as shown in the Master Science Plan above.
There will also be trim manoeuvres thus:
19 Jan, 13:31 (sc 3)
19 Jan, 14:18 (sc 1)
19 Jan, 14:24 (sc 4)
19 Jan, 14:32 (sc 2)
No data-taking on all four spacecraft from 12:31 to 21:31. This is
balanced by additional BM1 as shown in the Master Science Plan above.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking for
several hours around each manoeuvre, typically from one hour before
the manoeuvre to 7 hours after the manoeuvre.
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre period.
Attitude manoeuvres, April 2010
In April 2010, there will be a series of manoeuvres to adjust the attitudes of the spacecraft
to keep these within operational limits with respect to the Sun.
The manoeuvre times are shown below.
08 Apr, 07:00 (sc 3)
08 Apr, 08:00 (sc 4)
08 Apr, 08:30 (sc 2)
08 Apr, 10:00 (sc 1)
The no data-taking periods around the eclipse on 08 April will be extended back in time to encompass
these manoeuvres, i.e. from 14:30 to 06:30 on C3, from 14:30 to 07:30 on C1 and from 18:07 to 07:30 on
C2 and C4. This substantial extension is
balanced by additional BM1 as shown in the Master Science Plan above.
There will also be trim manoeuvres thus:
15 Apr, 10:20 (sc 1)
15 Apr, 11:30 (sc 2)
15 Apr, 11:30 (sc 3)
15 Apr, 11:30 (sc 4)
The no data-taking periods around the eclipse on 15 April will be extended back in time to encompass
these manoeuvres, i.e. from 10:30 to 10:00 on C1 and C3 and from 12:56 to 10:00 on
C2 and C4. This is only a small loss, so no additional BM1 has been added.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking for
several hours around each manoeuvre, typically from one hour before
the manoeuvre to 7 hours after the manoeuvre.
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre period.
Spring eclipses 2010
The Cluster spacecraft will experience a series of umbral eclipses between 15 January and 22 June 2010.
There will not be enough power to
operate
the payloads in these periods, so they will
switched off as shown in the table below.
Notes
1. To reduce operational workload during the eclipse season, a number of instruments will remain switched on (but not collecting science data) during
eclipses as follows:
EDI on spacecraft 4
FGM on spacecraft 2 and 4
RAPID on spacecraft 2 and 4
These are cases where there is sufficient battery capacity to avoid switch-off and where remaining on avoids problems such as loss of software patches
and calibration issues.
2. Due to power constraints the SSRs will be emptied before
each eclipse. Thus
no burst mode adjustment will be made to balance the no-data-taking
periods (as was the practice in earlier eclipse seasons).
Given the absence of burst mode balancing, the payload off periods
have not been consolidated to focus on multi-spacecraft operations
(as was also done in previous seasons). The payload off periods are restricted
to those requested by ESOC.
3. These payload-off periods are not
are displayed on the Bryant plots as the plotting
software does not have the capability to handle individual
payload-off periods for each spacecraft.
4. The spacecraft 3 payload-off period on 19 January nominally runs from 13:30 to 19:00 (ESOC request). It has been extended here to match
the safety periods around the trim manoeuvre which occurs at the same time (see above).
5. The spacecraft payload-off periods on 08 April nominally start at 14:30 (C1 and C3) and 18:07 (C2 and C4)
(ESOC request). These have been extended earlier to 06:30 (C3) and 07:30 (C1, C2 and C4)
to provide safety periods around the attitude manoeuvres which occur just before the eclipses (see below).
6. The spacecraft payload-off periods on 15 April nominally start at 10:30 (C1 and C3) and 12:56 (C2 and C4)
(ESOC request). These have been extended earlier to 10:00
to provide safety periods around the trim manoeuvres which occur just before the eclipses (see below).
7. The spacecraft 4 payload-off period on 17 April nominally runs from 19:11 to 20:05 (original ESOC request).
It has been extended to run from 18:00 to 03:00 next day at the further request of ESOC (to reflect updated
power constraints). EDI, FGM and RAPID on C4 will be switched off during this period.
Spacecraft |
Payload off |
Payload on |
Notes |
3 |
15/01/2010 02:14 |
15/01/2010 02:37 |
|
3 |
17/01/2010 07:00 |
17/01/2010 13:00 |
|
3 |
19/01/2010 12:31 |
19/01/2010 21:31 |
4 |
3 |
21/01/2010 18:00 |
22/01/2010 00:00 |
|
3 |
24/01/2010 02:30 |
24/01/2010 09:00 |
|
3 |
26/01/2010 08:00 |
26/01/2010 14:00 |
|
3 |
28/01/2010 14:00 |
28/01/2010 20:00 |
|
3 |
30/01/2010 20:30 |
31/01/2010 02:00 |
|
3 |
02/02/2010 03:30 |
02/02/2010 09:30 |
|
1 |
02/02/2010 04:20 |
02/02/2010 04:44 |
|
1 |
04/02/2010 08:00 |
04/02/2010 16:30 |
|
3 |
04/02/2010 08:00 |
04/02/2010 16:30 |
|
2 |
04/02/2010 10:32 |
04/02/2010 11:05 |
|
4 |
04/02/2010 10:32 |
04/02/2010 11:05 |
|
1 |
06/02/2010 14:00 |
06/02/2010 21:00 |
|
3 |
06/02/2010 14:00 |
06/02/2010 21:00 |
|
2 |
06/02/2010 16:48 |
06/02/2010 17:22 |
|
4 |
06/02/2010 16:48 |
06/02/2010 17:22 |
|
1 |
08/02/2010 22:30 |
09/02/2010 06:30 |
|
3 |
08/02/2010 22:30 |
09/02/2010 06:30 |
|
2 |
08/02/2010 23:03 |
08/02/2010 23:38 |
|
4 |
08/02/2010 23:03 |
08/02/2010 23:38 |
|
1 |
11/02/2010 04:00 |
11/02/2010 11:00 |
|
3 |
11/02/2010 04:00 |
11/02/2010 11:00 |
|
2 |
11/02/2010 05:19 |
11/02/2010 05:54 |
|
4 |
11/02/2010 05:19 |
11/02/2010 05:54 |
|
1 |
13/02/2010 09:00 |
13/02/2010 16:30 |
|
3 |
13/02/2010 09:00 |
13/02/2010 16:30 |
|
2 |
13/02/2010 11:35 |
13/02/2010 12:11 |
|
4 |
13/02/2010 11:35 |
13/02/2010 12:11 |
|
1 |
15/02/2010 15:00 |
15/02/2010 22:00 |
|
3 |
15/02/2010 15:00 |
15/02/2010 22:00 |
|
2 |
15/02/2010 17:52 |
15/02/2010 18:29 |
|
4 |
15/02/2010 17:52 |
15/02/2010 18:29 |
|
1 |
17/02/2010 23:00 |
18/02/2010 07:30 |
|
3 |
17/02/2010 23:00 |
18/02/2010 07:30 |
|
2 |
18/02/2010 00:09 |
18/02/2010 00:47 |
|
4 |
18/02/2010 00:09 |
18/02/2010 00:47 |
|
1 |
20/02/2010 05:00 |
20/02/2010 14:00 |
|
3 |
20/02/2010 05:00 |
20/02/2010 14:00 |
|
2 |
20/02/2010 06:26 |
20/02/2010 07:04 |
|
4 |
20/02/2010 06:26 |
20/02/2010 07:04 |
|
1 |
22/02/2010 08:45 |
22/02/2010 17:15 |
|
3 |
22/02/2010 08:45 |
22/02/2010 17:15 |
|
2 |
22/02/2010 12:41 |
22/02/2010 13:20 |
|
4 |
22/02/2010 12:41 |
22/02/2010 13:20 |
|
1 |
24/02/2010 15:30 |
24/02/2010 22:30 |
|
3 |
24/02/2010 15:30 |
24/02/2010 22:30 |
|
2 |
24/02/2010 18:57 |
24/02/2010 19:36 |
|
4 |
24/02/2010 18:57 |
24/02/2010 19:36 |
|
1 |
27/02/2010 00:45 |
27/02/2010 09:15 |
|
3 |
27/02/2010 00:45 |
27/02/2010 09:15 |
|
2 |
27/02/2010 01:13 |
27/02/2010 01:53 |
|
4 |
27/02/2010 01:13 |
27/02/2010 01:53 |
|
1 |
01/03/2010 06:00 |
01/03/2010 14:00 |
|
3 |
01/03/2010 06:00 |
01/03/2010 14:00 |
|
2 |
01/03/2010 07:31 |
01/03/2010 08:12 |
|
4 |
01/03/2010 07:31 |
01/03/2010 08:12 |
|
1 |
03/03/2010 12:00 |
03/03/2010 19:00 |
|
3 |
03/03/2010 12:00 |
03/03/2010 19:00 |
|
2 |
03/03/2010 13:48 |
03/03/2010 14:30 |
|
4 |
03/03/2010 13:48 |
03/03/2010 14:30 |
|
1 |
05/03/2010 17:00 |
06/03/2010 00:00 |
|
3 |
05/03/2010 17:00 |
06/03/2010 00:00 |
|
2 |
05/03/2010 20:05 |
05/03/2010 20:47 |
|
4 |
05/03/2010 20:05 |
05/03/2010 20:47 |
|
1 |
08/03/2010 01:00 |
08/03/2010 08:30 |
|
3 |
08/03/2010 01:00 |
08/03/2010 08:30 |
|
2 |
08/03/2010 02:20 |
08/03/2010 03:03 |
|
4 |
08/03/2010 02:20 |
08/03/2010 03:03 |
|
1 |
10/03/2010 07:00 |
10/03/2010 14:00 |
|
3 |
10/03/2010 07:00 |
10/03/2010 14:00 |
|
2 |
10/03/2010 08:36 |
10/03/2010 09:19 |
|
4 |
10/03/2010 08:36 |
10/03/2010 09:19 |
|
1 |
12/03/2010 12:30 |
12/03/2010 19:30 |
|
3 |
12/03/2010 12:30 |
12/03/2010 19:30 |
|
2 |
12/03/2010 14:52 |
12/03/2010 15:36 |
|
4 |
12/03/2010 14:52 |
12/03/2010 15:36 |
|
1 |
14/03/2010 20:30 |
15/03/2010 03:30 |
|
3 |
14/03/2010 20:30 |
15/03/2010 03:30 |
|
2 |
14/03/2010 21:09 |
14/03/2010 21:54 |
|
4 |
14/03/2010 21:09 |
14/03/2010 21:54 |
|
1 |
17/03/2010 01:30 |
17/03/2010 08:30 |
|
3 |
17/03/2010 01:30 |
17/03/2010 08:30 |
|
2 |
17/03/2010 03:26 |
17/03/2010 04:12 |
|
4 |
17/03/2010 03:26 |
17/03/2010 04:12 |
|
1 |
19/03/2010 07:00 |
19/03/2010 14:30 |
|
3 |
19/03/2010 07:00 |
19/03/2010 14:30 |
|
2 |
19/03/2010 09:42 |
19/03/2010 10:29 |
|
4 |
19/03/2010 09:42 |
19/03/2010 10:29 |
|
1 |
21/03/2010 13:00 |
21/03/2010 20:30 |
|
3 |
21/03/2010 13:00 |
21/03/2010 20:30 |
|
2 |
21/03/2010 15:58 |
21/03/2010 16:45 |
|
4 |
21/03/2010 15:58 |
21/03/2010 16:45 |
|
1 |
23/03/2010 21:15 |
24/03/2010 06:30 |
|
3 |
23/03/2010 21:15 |
24/03/2010 06:30 |
|
2 |
23/03/2010 22:13 |
23/03/2010 23:01 |
|
4 |
23/03/2010 22:13 |
23/03/2010 23:01 |
|
1 |
26/03/2010 03:00 |
26/03/2010 12:00 |
|
3 |
26/03/2010 03:00 |
26/03/2010 12:00 |
|
2 |
26/03/2010 04:30 |
26/03/2010 05:13 |
|
4 |
26/03/2010 04:30 |
26/03/2010 05:13 |
|
1 |
28/03/2010 09:00 |
28/03/2010 16:00 |
|
3 |
28/03/2010 09:00 |
28/03/2010 16:00 |
|
2 |
28/03/2010 10:47 |
28/03/2010 11:36 |
|
4 |
28/03/2010 10:47 |
28/03/2010 11:36 |
|
1 |
30/03/2010 13:00 |
30/03/2010 20:30 |
|
3 |
30/03/2010 13:00 |
30/03/2010 20:30 |
|
2 |
30/03/2010 17:04 |
30/03/2010 17:53 |
|
4 |
30/03/2010 17:04 |
30/03/2010 17:53 |
|
1 |
01/04/2010 22:00 |
02/04/2010 05:30 |
|
3 |
01/04/2010 22:00 |
02/04/2010 05:30 |
|
2 |
01/04/2010 23:21 |
02/04/2010 00:10 |
|
4 |
01/04/2010 23:21 |
02/04/2010 00:10 |
|
1 |
04/04/2010 04:00 |
04/04/2010 12:00 |
|
3 |
04/04/2010 04:00 |
04/04/2010 12:00 |
|
2 |
04/04/2010 05:36 |
04/04/2010 06:26 |
|
4 |
04/04/2010 05:36 |
04/04/2010 06:26 |
|
1 |
06/04/2010 07:30 |
06/04/2010 16:00 |
|
3 |
06/04/2010 07:30 |
06/04/2010 16:00 |
|
2 |
06/04/2010 11:51 |
06/04/2010 12:42 |
|
4 |
06/04/2010 11:51 |
06/04/2010 12:42 |
|
1 |
08/04/2010 07:30 |
08/04/2010 22:00 |
5 |
3 |
08/04/2010 06:30 |
08/04/2010 22:00 |
5 |
2 |
08/04/2010 07:30 |
08/04/2010 18:58 |
5 |
4 |
08/04/2010 07:30 |
08/04/2010 18:58 |
5 |
1 |
10/04/2010 23:00 |
11/04/2010 07:30 |
|
3 |
10/04/2010 23:00 |
11/04/2010 07:30 |
|
2 |
11/04/2010 00:23 |
11/04/2010 01:16 |
|
4 |
11/04/2010 00:23 |
11/04/2010 01:16 |
|
1 |
13/04/2010 05:00 |
13/04/2010 12:30 |
|
3 |
13/04/2010 05:00 |
13/04/2010 12:30 |
|
2 |
13/04/2010 06:40 |
13/04/2010 07:33 |
|
4 |
13/04/2010 06:40 |
13/04/2010 07:33 |
|
1 |
15/04/2010 10:00 |
15/04/2010 17:30 |
6 |
3 |
15/04/2010 10:00 |
15/04/2010 17:30 |
6 |
2 |
15/04/2010 10:00 |
15/04/2010 13:50 |
6 |
4 |
15/04/2010 10:00 |
15/04/2010 13:50 |
6 |
1 |
17/04/2010 18:00 |
18/04/2010 03:00 |
|
3 |
17/04/2010 18:00 |
18/04/2010 03:00 |
|
2 |
17/04/2010 19:11 |
17/04/2010 20:05 |
|
4 |
17/04/2010 18:00 |
18/04/2010 03:00 |
7 |
1 |
19/04/2010 23:30 |
20/04/2010 06:30 |
|
3 |
19/04/2010 23:30 |
20/04/2010 06:30 |
|
2 |
20/04/2010 01:26 |
20/04/2010 02:21 |
|
4 |
20/04/2010 01:26 |
20/04/2010 02:21 |
|
1 |
22/04/2010 05:00 |
22/04/2010 12:30 |
|
3 |
22/04/2010 05:00 |
22/04/2010 12:30 |
|
2 |
22/04/2010 07:41 |
22/04/2010 08:37 |
|
4 |
22/04/2010 07:41 |
22/04/2010 08:37 |
|
1 |
24/04/2010 11:00 |
24/04/2010 18:00 |
|
3 |
24/04/2010 11:00 |
24/04/2010 18:00 |
|
2 |
24/04/2010 13:58 |
24/04/2010 14:54 |
|
4 |
24/04/2010 13:58 |
24/04/2010 14:47 |
|
1 |
26/04/2010 19:30 |
27/04/2010 04:30 |
|
3 |
26/04/2010 19:30 |
27/04/2010 04:30 |
|
2 |
26/04/2010 20:14 |
26/04/2010 21:12 |
|
4 |
26/04/2010 20:14 |
26/04/2010 21:12 |
|
1 |
29/04/2010 00:30 |
29/04/2010 09:30 |
|
3 |
29/04/2010 00:30 |
29/04/2010 09:30 |
|
2 |
29/04/2010 02:30 |
29/04/2010 03:28 |
|
4 |
29/04/2010 02:30 |
29/04/2010 03:28 |
|
1 |
01/05/2010 07:00 |
01/05/2010 14:00 |
2 |
01/05/2010 08:55 |
01/05/2010 09:44 |
3 |
01/05/2010 07:00 |
01/05/2010 14:00 |
4 |
01/05/2010 07:00 |
01/05/2010 14:00 |
1 |
03/05/2010 12:00 |
03/05/2010 20:00 |
3 |
03/05/2010 12:00 |
03/05/2010 20:00 |
4 |
03/05/2010 12:00 |
03/05/2010 20:00 |
2 |
03/05/2010 15:10 |
03/05/2010 15:59 |
1 |
05/05/2010 20:00 |
06/05/2010 04:30 |
3 |
05/05/2010 20:00 |
06/05/2010 04:30 |
4 |
05/05/2010 20:00 |
06/05/2010 04:30 |
2 |
05/05/2010 21:25 |
05/05/2010 22:14 |
1 |
08/05/2010 01:30 |
08/05/2010 09:30 |
3 |
08/05/2010 01:30 |
08/05/2010 09:30 |
4 |
08/05/2010 01:30 |
08/05/2010 09:30 |
2 |
08/05/2010 03:41 |
08/05/2010 04:31 |
1 |
10/05/2010 05:00 |
10/05/2010 15:00 |
3 |
10/05/2010 05:00 |
10/05/2010 15:00 |
4 |
10/05/2010 05:00 |
10/05/2010 15:00 |
2 |
10/05/2010 09:58 |
10/05/2010 10:48 |
1 |
12/05/2010 11:30 |
12/05/2010 20:00 |
3 |
12/05/2010 11:30 |
12/05/2010 20:00 |
4 |
12/05/2010 11:30 |
12/05/2010 20:00 |
2 |
12/05/2010 16:14 |
12/05/2010 17:04 |
1 |
14/05/2010 11:00 |
15/05/2010 04:00 |
3 |
14/05/2010 11:00 |
15/05/2010 04:00 |
4 |
14/05/2010 11:00 |
15/05/2010 04:00 |
2 |
14/05/2010 22:29 |
14/05/2010 23:19 |
1 |
17/05/2010 02:30 |
17/05/2010 10:30 |
3 |
17/05/2010 02:30 |
17/05/2010 10:30 |
4 |
17/05/2010 02:30 |
17/05/2010 10:30 |
2 |
17/05/2010 04:44 |
17/05/2010 05:33 |
1 |
19/05/2010 06:00 |
19/05/2010 16:00 |
3 |
19/05/2010 06:00 |
19/05/2010 16:00 |
4 |
19/05/2010 06:00 |
19/05/2010 16:00 |
2 |
19/05/2010 11:00 |
19/05/2010 11:49 |
1 |
21/05/2010 16:00 |
22/05/2010 01:00 |
3 |
21/05/2010 16:00 |
22/05/2010 01:00 |
4 |
21/05/2010 16:00 |
22/05/2010 01:00 |
2 |
21/05/2010 17:17 |
21/05/2010 18:05 |
1 |
23/05/2010 21:30 |
24/05/2010 05:00 |
3 |
23/05/2010 21:30 |
24/05/2010 05:00 |
4 |
23/05/2010 21:30 |
24/05/2010 05:00 |
2 |
23/05/2010 23:34 |
24/05/2010 00:22 |
1 |
26/05/2010 02:30 |
26/05/2010 10:30 |
3 |
26/05/2010 02:30 |
26/05/2010 10:30 |
4 |
26/05/2010 02:30 |
26/05/2010 10:30 |
2 |
26/05/2010 05:50 |
26/05/2010 06:37 |
1 |
28/05/2010 06:00 |
28/05/2010 16:00 |
3 |
28/05/2010 06:00 |
28/05/2010 16:00 |
4 |
28/05/2010 06:00 |
28/05/2010 16:00 |
2 |
28/05/2010 12:06 |
28/05/2010 12:52 |
1 |
30/05/2010 09:00 |
31/05/2010 03:00 |
3 |
30/05/2010 09:00 |
31/05/2010 03:00 |
4 |
30/05/2010 09:00 |
31/05/2010 03:00 |
2 |
30/05/2010 18:21 |
30/05/2010 19:06 |
1 |
01/06/2010 22:00 |
02/06/2010 07:00 |
3 |
01/06/2010 22:00 |
02/06/2010 07:00 |
4 |
01/06/2010 22:00 |
02/06/2010 07:00 |
2 |
02/06/2010 00:37 |
02/06/2010 01:20 |
1 |
04/06/2010 03:00 |
04/06/2010 12:00 |
3 |
04/06/2010 03:00 |
04/06/2010 12:00 |
4 |
04/06/2010 03:00 |
04/06/2010 12:00 |
2 |
04/06/2010 06:54 |
04/06/2010 07:35 |
1 |
06/06/2010 07:30 |
06/06/2010 20:30 |
3 |
06/06/2010 07:30 |
06/06/2010 20:30 |
4 |
06/06/2010 07:30 |
06/06/2010 20:30 |
2 |
06/06/2010 13:12 |
06/06/2010 13:51 |
1 |
08/06/2010 17:00 |
09/06/2010 02:00 |
3 |
08/06/2010 17:00 |
09/06/2010 02:00 |
4 |
08/06/2010 17:00 |
09/06/2010 02:00 |
2 |
08/06/2010 19:30 |
08/06/2010 20:05 |
1 |
10/06/2010 23:30 |
11/06/2010 07:30 |
3 |
10/06/2010 23:30 |
11/06/2010 07:30 |
4 |
10/06/2010 23:30 |
11/06/2010 07:30 |
2 |
11/06/2010 01:48 |
11/06/2010 02:17 |
1 |
13/06/2010 06:00 |
13/06/2010 13:00 |
3 |
13/06/2010 06:00 |
13/06/2010 13:00 |
4 |
13/06/2010 06:00 |
13/06/2010 13:00 |
1 |
15/06/2010 09:30 |
15/06/2010 17:30 |
3 |
15/06/2010 09:30 |
15/06/2010 17:30 |
4 |
15/06/2010 09:30 |
15/06/2010 17:30 |
1 |
17/06/2010 19:00 |
18/06/2010 03:00 |
3 |
17/06/2010 19:00 |
18/06/2010 03:00 |
4 |
17/06/2010 19:00 |
18/06/2010 03:00 |
1 |
20/06/2010 01:00 |
20/06/2010 08:00 |
3 |
20/06/2010 01:00 |
20/06/2010 08:00 |
4 |
20/06/2010 02:26 |
20/06/2010 03:06 |
3 |
22/06/2010 05:00 |
22/06/2010 12:00 |
4 |
22/06/2010 08:48 |
22/06/2010 09:08 |
Orbit manoeuvre, June 2010
On 1 June 2010, there will be a manoeuvre to adjust the drift of Cluster 3.
The manoeuvre time is shown below.
01 Jun, 23:00 (sc 3)
This manoeuvre falls in the payload off period around an eclipse on Cluster 3.
Payload off runs from 22:00 on 1 June to 07:00 on 2 June. No further reduction in data-taking
is needed.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking for
several hours around each manoeuvre, typically from one hour before
the manoeuvre to 7 hours after the manoeuvre.
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre period.
Attitude manoeuvres, July 2010
In July 2010, there will be a series of manoeuvres to adjust the attitudes of the spacecraft
to keep these within operational limits with respect to the Sun.
The manoeuvre times are shown below.
14 Jul, 16:30 (sc 3)
14 Jul, 17:00 (sc 2)
14 Jul, 17:30 (sc 1)
14 Jul, 18:00 (sc 4)
The no data-taking periods around these manoeuvres from 16:00 to 20:09.
This gap is balanced by additional BM1 as shown in the Master Science Plan above.
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre burns. The early start of
data-taking supports a pre-planned WBD operation.
There will be no trim manoeuvres as orbit manoeuvres follow soon after these attitude manoeuvres.
Orbit phasing manoeuvres, July/September 2010
A series of manoeuvres of the Cluster spacecraft will take place during July, August and September 2010.
These will adjust the spacecraft separation to address forthcoming science targets.
The manoeuvre times are shown below.
As many instruments have to be switched into safe modes during
manoeuvre periods, there will be no data-taking for
several hours around each manoeuvre, typically from one hour before
the manoeuvre to 7 hours after the manoeuvre.
The no-data-taking period will sometimes end earlier in order to preserve WBD
operations already scheduled.
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre period.
Manoeuvre 1
20 Jul, 20:20 to 20:29 (sc 2)
No data-taking on spacecraft 2 from 19:50 to 03:29. This is not balanced by additional BM1
as it applies on only one spacecraft. Spacecraft 1, 3 and 4 continue data taking in line with
the Master Science Plan.
Manoeuvre 2
21 Jul, 19:11 (sc 4)
21 Jul, 19:23 (sc 1)
21 Jul, 19:23 (sc 3)
No data-taking on all four spacecraft from 18:30 to 19:54.
This gap is balanced by additional BM1 as shown in the Master Science Plan above.
Manoeuvre 3
30 Jul, 20:16 (sc 4)
30 Jul, 20:35-20:38 (sc 2)
30 Jul, 20:37 (sc 1)
30 Jul, 20:40 (sc 3)
No data-taking on all four spacecraft from 19:30 to 03:40.
This gap is balanced by additional BM1 as shown in the Master Science Plan above.
Manoeuvre 4
05 Aug, 15:55 to 16:25 (sc 2)
No data-taking on spacecraft 2 from 15:25 to 23:25. This is not balanced by additional BM1
as it applies on only one spacecraft. Spacecraft 1, 3 and 4 continue data taking in line with
the Master Science Plan.
Manoeuvre 5
12 Aug, 10:55 (sc 2)
No data-taking on spacecraft 2 from 10:25 to 17:56. This is not balanced by additional BM1
as it applies on only one spacecraft. Spacecraft 1, 3 and 4 continue data taking in line with
the Master Science Plan.
Manoeuvre 6
20 Aug, 04:41 (sc 2)
No data-taking on spacecraft 2 from 04:11 to 11:42. This is not balanced by additional BM1
as it applies on only one spacecraft. Spacecraft 1, 3 and 4 continue data taking in line with
the Master Science Plan.
Manoeuvre 7
02 Sep, 18:21 (sc 2)
02 Sep, 19:01 (sc 1)
02 Sep, 19:19 (sc 3)
No data-taking on all four spacecraft from 17:21 to 02:20.
This gap is balanced by additional BM1 as shown in the Master Science Plan above.
Manoeuvre 8
07 Sep, 06:55 (sc 2)
07 Sep, 07:36 (sc 1)
07 Sep, 07:54 (sc 3)
No data-taking on all four spacecraft from 05:55 to 09:03.
This gap is balanced by additional BM1 as shown in the Master Science Plan above.
Attitude manoeuvres, October 2010
In October 2010, there will be a series of manoeuvres to adjust the attitudes of the spacecraft
to keep these within operational limits with respect to the Sun.
The manoeuvre times are shown below.
14 Oct, 11:00 (sc 1)
14 Oct, 11:30 (sc 4)
14 Oct, 12:00 (sc 3)
14 Oct, 12:30 (sc 2)
No data-taking on all four spacecraft from 10:00 to 19:30.
These will be followed by trim manoeuvres as follows.
22 Oct, 12:27 (sc 2)
22 Oct, 12:40 (sc 4)
22 Oct, 13:21 (sc 1)
22 Oct, 13:41 (sc 3)
No data-taking on all four spacecraft from 11:27 to 16:30.
These no data-taking periods are balanced by additional BM1 as shown in the Master Science Plan above.
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre burns. The early start of
data-taking after the trim manoeuvres supports a pre-planned WBD operation.
Orbit trim manoeuvres, December 2010
In December 2010, there will be manoeuvres on spacecraft 1, 3 and 4 to correct for the orbit
drift caused by thruster gas releases arising from the spacecraft power down at eclipses.
The manoeuvre times are shown below.
13 Dec, 11:00 (sc 1)
13 Dec, 12:00 (sc 4)
13 Dec, 13:00 (sc 3)
There will be no changes to data-taking periods as these manoeuvres fall in the payload-off periods around
eclipses.
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre burns.
Attitude manoeuvres, January 2011
In January 2011, there will be a series of manoeuvres to adjust the attitudes of the spacecraft
to keep these within operational limits with respect to the Sun.
The manoeuvre times are shown below.
19 Jan, 16:30 (sc 4)
19 Jan, 17:00 (sc 3)
19 Jan, 18:00 (sc 1)
19 Jan, 18:45 (sc 2)
No data-taking on all four spacecraft from 15:30 to 01:46, which
spans apogee. This no-data-taking will be
balanced by extending the BM1 period that has been scheduled during the
outbound crossing of the magnetosheath on the same orbit. See the MSP
details for orbit 1632.
These will be followed by trim manoeuvres as follows.
25 Jan, 10:30 (sc 2)
25 Jan, 11:20 (sc 4)
25 Jan, 11:45 (sc 1)
25 Jan, 12:25 (sc 3)
There will no changes to data-taking periods on C1, C3 and C4 as these manoeuvres fall well inside the eclipse payload-off periods
for these spacecraft. For C2, the manoeuvre falls 38 minutes before the nominal start of the eclipse payload-off period;
so that period has been extended to run from 09:30 to 16:30 to provide manoeuvre protection (see above).
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre burns.
Long eclipses 2010-2011
The Cluster spacecraft will experience a series of umbral eclipses
between 22 October 2010 and 23 July 2011. There will not be enough power to
operate
the payloads in these periods, so they will
switched off as shown in the table below.
The present table covers the full eclipse season from 22 October 2010 to 23 July 2011.
Notes
1. Due to power constraints the SSRs will be emptied before
each eclipse. Thus
no burst mode adjustment will be made to balance the no-data-taking
periods (as was the practice in earlier eclipse seasons).
Given the absence of burst mode balancing, the payload off periods
have not been consolidated to focus on multi-spacecraft operations
(as was also done in previous seasons). The payload off periods are restricted
to those requested by ESOC.
2. These payload-off periods are not
are displayed on the Bryant plots as the plotting
software does not have the capability to handle individual
payload-off periods for each spacecraft.
3. The first payload-off period (spacecraft 2 on 22 October) has been
integrated into the no-data-taking period for trim manoeuvres as specified
above.
4. EDI on spacecraft 2 will be switched off continuously from
12:00 on 22 October to 21:30 on 6 December 2010 because of the difficulty
of restoring patches after power-down.
5. RAPID and EDI on spacecraft 2
will remain in standby mode during eclipses from 8 December 2010.
At this time there will sufficient power to maintain standby and thus preserve
patches on this instruments.
6. Payload off periods on spacecraft 3 and 4 on 20 December 2010 were extended by 2h10m compared
to original planning released in Sep 2010.
7. Orbit trim manoeuvres will take place during these payload-off periods, see below.
8. The payload off period on C2 on 25 January has been extended to run from 09:30 to
16:30 to provide manoeuvre protection. The original off period was 11:08 to 11:49.
9. The C1, C3 and C4 payload off periods on 18/19 April will now start 4.5 hours earlier than originally
planned. This releases data downlink capacity that ESOC need to downlink the BM1 period at the
tetrahedron quality parameter maximum just before the inbound bow shock.
10. The C1, C3 and C4 payload off periods on 29 March will now start later than originally
planned. This gives more scope for Guest Investigator observations agreed by SOWG.
11. The C1 and C3 payload off periods on 3 April will now start later than originally
planned. This gives more scope for Guest Investigator observations agreed by SOWG.
12. The payoff periods on 21 April will start about one hour earlier than originally planned on all 4 spacecraft
- to provide manoeuvre protection.
13. The C2 payoff period on 25 May will start 30 mins earlier than originally planned - to provide manoeuvre protection.
Spacecraft |
Payload off |
Payload on |
Notes |
2 |
22/10/2010
12:00 |
22/10/2010
16:30 |
3 |
2 |
24/10/2010 17:30 |
24/10/2010 23:00 |
|
2 |
27/10/2010 00:00 |
27/10/2010 05:15 |
|
2 |
29/10/2010 04:00 |
29/10/2010 12:30 |
|
2 |
31/10/2010 12:00 |
31/10/2010 17:30 |
|
2 |
02/11/2010 15:30 |
03/11/2010 00:00 |
|
2 |
05/11/2010 01:00 |
05/11/2010 06:00 |
|
2 |
07/11/2010 07:00 |
07/11/2010 13:00 |
|
4 |
07/11/2010 08:00 |
07/11/2010 14:00 |
|
3 |
07/11/2010 09:00 |
07/11/2010 15:00 |
|
2 |
09/11/2010 12:00 |
09/11/2010 18:30 |
|
3 |
09/11/2010 13:00 |
09/11/2010 21:30 |
|
4 |
09/11/2010 14:00 |
09/11/2010 20:30 |
|
1 |
09/11/2010 15:00 |
09/11/2010 20:30 |
|
4 |
11/11/2010 16:30 |
12/11/2010 02:00 |
|
2 |
11/11/2010 17:30 |
12/11/2010 01:00 |
|
1 |
11/11/2010 18:30 |
12/11/2010 03:00 |
|
3 |
11/11/2010 19:30 |
12/11/2010 04:00 |
|
2 |
13/11/2010 22:00 |
14/11/2010 07:00 |
|
4 |
13/11/2010 23:00 |
14/11/2010 11:00 |
|
1 |
14/11/2010 00:00 |
14/11/2010 08:00 |
|
3 |
14/11/2010 01:00 |
14/11/2010 12:00 |
|
2 |
16/11/2010 05:00 |
16/11/2010 14:00 |
|
4 |
16/11/2010 06:00 |
16/11/2010 15:00 |
|
1 |
16/11/2010 07:00 |
16/11/2010 16:00 |
|
3 |
16/11/2010 08:00 |
16/11/2010 17:00 |
|
2 |
18/11/2010 07:00 |
18/11/2010 20:00 |
|
1 |
18/11/2010 09:00 |
18/11/2010 22:00 |
|
4 |
18/11/2010 11:00 |
18/11/2010 21:00 |
|
3 |
18/11/2010 13:00 |
18/11/2010 23:00 |
|
2 |
20/11/2010 18:00 |
21/11/2010 01:00 |
|
4 |
20/11/2010 19:00 |
21/11/2010 02:00 |
|
1 |
20/11/2010 20:00 |
21/11/2010 03:00 |
|
3 |
20/11/2010 21:00 |
21/11/2010 04:00 |
|
2 |
23/11/2010 01:30 |
23/11/2010 10:30 |
|
4 |
23/11/2010 02:30 |
23/11/2010 11:30 |
|
1 |
23/11/2010 03:30 |
23/11/2010 12:30 |
|
3 |
23/11/2010 04:30 |
23/11/2010 13:30 |
|
2 |
25/11/2010 07:00 |
25/11/2010 15:00 |
|
4 |
25/11/2010 08:00 |
25/11/2010 16:00 |
|
1 |
25/11/2010 09:00 |
25/11/2010 17:00 |
|
3 |
25/11/2010 10:00 |
25/11/2010 18:00 |
|
2 |
27/11/2010 13:00 |
27/11/2010 21:00 |
|
4 |
27/11/2010 14:00 |
27/11/2010 22:00 |
|
1 |
27/11/2010 15:00 |
27/11/2010 23:00 |
|
3 |
27/11/2010 16:00 |
28/11/2010 00:00 |
|
2 |
29/11/2010 17:00 |
30/11/2010 02:30 |
|
4 |
29/11/2010 18:00 |
30/11/2010 03:30 |
|
1 |
29/11/2010 19:00 |
30/11/2010 04:30 |
|
3 |
29/11/2010 20:00 |
30/11/2010 05:30 |
|
2 |
02/12/2010 02:30 |
02/12/2010 10:30 |
|
4 |
02/12/2010 03:30 |
02/12/2010 11:30 |
|
1 |
02/12/2010 04:30 |
02/12/2010 12:30 |
|
3 |
02/12/2010 05:30 |
02/12/2010 13:30 |
|
2 |
04/12/2010 08:00 |
04/12/2010 15:00 |
|
4 |
04/12/2010 09:00 |
04/12/2010 16:00 |
|
1 |
04/12/2010 10:00 |
04/12/2010 17:00 |
|
3 |
04/12/2010 11:00 |
04/12/2010 18:00 |
|
2 |
06/12/2010 13:30 |
06/12/2010 21:30 |
|
4 |
06/12/2010 14:30 |
06/12/2010 22:30 |
|
1 |
06/12/2010 15:30 |
06/12/2010 23:30 |
|
3 |
06/12/2010 16:30 |
07/12/2010 00:30 |
|
4 |
08/12/2010 20:30 |
09/12/2010 07:30 |
|
1 |
08/12/2010 21:30 |
09/12/2010 08:30 |
|
3 |
08/12/2010 22:30 |
09/12/2010 09:30 |
|
2 |
08/12/2010 23:52 |
09/12/2010 00:51 |
|
4 |
11/12/2010 04:30 |
11/12/2010 11:30 |
|
1 |
11/12/2010 05:30 |
11/12/2010 12:30 |
|
2 |
11/12/2010 06:07 |
11/12/2010 07:04 |
|
3 |
11/12/2010 06:30 |
11/12/2010 13:30 |
|
4 |
13/12/2010 10:00 |
13/12/2010 17:00 |
7 |
1 |
13/12/2010 11:00 |
13/12/2010 18:00 |
7 |
3 |
13/12/2010 12:00 |
13/12/2010 19:00 |
7 |
2 |
13/12/2010 12:22 |
13/12/2010 13:18 |
|
4 |
15/12/2010 15:30 |
15/12/2010 22:30 |
|
1 |
15/12/2010 16:30 |
15/12/2010 23:30 |
|
3 |
15/12/2010 17:30 |
16/12/2010 00:30 |
|
2 |
15/12/2010 18:37 |
15/12/2010 19:31 |
|
4 |
17/12/2010 18:00 |
18/12/2010 04:00 |
|
1 |
17/12/2010 19:00 |
18/12/2010 05:00 |
|
3 |
17/12/2010 20:00 |
18/12/2010 09:00 |
|
2 |
18/12/2010 00:51 |
18/12/2010 01:44 |
|
4 |
20/12/2010 06:00 |
20/12/2010 13:40 |
6 |
1 |
20/12/2010 07:00 |
20/12/2010 12:30 |
|
2 |
20/12/2010 07:05 |
20/12/2010 07:57 |
|
3 |
20/12/2010 08:00 |
20/12/2010 15:40 |
6 |
4 |
22/12/2010 12:00 |
22/12/2010 19:00 |
|
1 |
22/12/2010 13:00 |
22/12/2010 20:00 |
|
2 |
22/12/2010 13:19 |
22/12/2010 14:10 |
|
3 |
22/12/2010 14:00 |
22/12/2010 21:00 |
|
4 |
24/12/2010 17:30 |
24/12/2010 23:30 |
|
1 |
24/12/2010 18:30 |
25/12/2010 00:30 |
|
3 |
24/12/2010 19:30 |
25/12/2010 01:30 |
|
2 |
24/12/2010 19:34 |
24/12/2010 20:24 |
|
4 |
27/12/2010 01:00 |
27/12/2010 09:00 |
|
2 |
27/12/2010 01:50 |
27/12/2010 02:39 |
|
1 |
27/12/2010 02:00 |
27/12/2010 10:00 |
|
3 |
27/12/2010 03:00 |
27/12/2010 11:00 |
|
4 |
29/12/2010 06:45 |
29/12/2010 12:15 |
|
1 |
29/12/2010 07:45 |
29/12/2010 13:15 |
|
2 |
29/12/2010 08:06 |
29/12/2010 08:54 |
|
3 |
29/12/2010 08:45 |
29/12/2010 14:15 |
|
4 |
31/12/2010 12:30 |
31/12/2010 18:30 |
|
1 |
31/12/2010 13:30 |
31/12/2010 19:30 |
|
2 |
31/12/2010 14:21 |
31/12/2010 15:08 |
|
4 |
02/01/2011 15:30 |
03/01/2011 00:30 |
1 |
02/01/2011 16:30 |
03/01/2011 01:30 |
3 |
02/01/2011 17:30 |
03/01/2011 02:30 |
2 |
02/01/2011 20:35 |
02/01/2011 21:21 |
4 |
04/01/2011 18:30 |
05/01/2011 10:00 |
1 |
04/01/2011 19:30 |
05/01/2011 17:00 |
3 |
05/01/2011 00:00 |
05/01/2011 17:30 |
2 |
05/01/2011 02:49 |
05/01/2011 03:35 |
4 |
07/01/2011 00:00 |
07/01/2011 16:00 |
1 |
07/01/2011 03:00 |
07/01/2011 17:00 |
3 |
07/01/2011 09:00 |
07/01/2011 18:00 |
2 |
07/01/2011 09:04 |
07/01/2011 09:49 |
4 |
09/01/2011 12:00 |
09/01/2011 20:00 |
1 |
09/01/2011 13:00 |
09/01/2011 21:00 |
3 |
09/01/2011 14:00 |
09/01/2011 22:00 |
2 |
09/01/2011 15:20 |
09/01/2011 16:04 |
4 |
11/01/2011 16:00 |
12/01/2011 01:00 |
1 |
11/01/2011 17:00 |
12/01/2011 02:00 |
3 |
11/01/2011 18:00 |
12/01/2011 07:00 |
2 |
11/01/2011 21:36 |
11/01/2011 22:20 |
4 |
14/01/2011 03:00 |
14/01/2011 10:00 |
2 |
14/01/2011 03:51 |
14/01/2011 04:34 |
1 |
14/01/2011 04:00 |
14/01/2011 11:00 |
3 |
14/01/2011 05:00 |
14/01/2011 12:00 |
4 |
16/01/2011 09:00 |
16/01/2011 15:00 |
3 |
16/01/2011 10:00 |
16/01/2011 17:00 |
2 |
16/01/2011 10:05 |
16/01/2011 10:48 |
1 |
16/01/2011 11:00 |
16/01/2011 16:00 |
4 |
18/01/2011 12:30 |
18/01/2011 20:00 |
1 |
18/01/2011 13:30 |
18/01/2011 21:00 |
3 |
18/01/2011 14:30 |
18/01/2011 22:00 |
2 |
18/01/2011 16:20 |
18/01/2011 17:02 |
4 |
20/01/2011 19:00 |
21/01/2011 03:00 |
1 |
20/01/2011 20:00 |
21/01/2011 04:00 |
3 |
20/01/2011 21:00 |
21/01/2011 04:00 |
2 |
20/01/2011 22:35 |
20/01/2011 23:17 |
4 |
23/01/2011 03:00 |
23/01/2011 11:00 |
1 |
23/01/2011 04:00 |
23/01/2011 12:00 |
2 |
23/01/2011 04:52 |
23/01/2011 05:33 |
3 |
23/01/2011 05:00 |
23/01/2011 13:00 |
4 |
25/01/2011 09:00 |
25/01/2011 17:00 |
1 |
25/01/2011 10:00 |
25/01/2011 18:00 |
3 |
25/01/2011 11:00 |
25/01/2011 19:00 |
2 |
25/01/2011 11:08 |
25/01/2011 11:49 |
8 |
4 |
27/01/2011 14:30 |
27/01/2011 22:00 |
1 |
27/01/2011 15:30 |
27/01/2011 23:00 |
3 |
27/01/2011 16:30 |
28/01/2011 00:00 |
2 |
27/01/2011 17:24 |
27/01/2011 18:05 |
4 |
29/01/2011 22:30 |
30/01/2011 07:00 |
1 |
29/01/2011 23:30 |
30/01/2011 08:00 |
2 |
29/01/2011 23:39 |
30/01/2011 00:19 |
3 |
30/01/2011 00:30 |
30/01/2011 09:00 |
4 |
01/02/2011 04:30 |
01/02/2011 11:00 |
1 |
01/02/2011 05:30 |
01/02/2011 12:00 |
2 |
01/02/2011 05:54 |
01/02/2011 06:34 |
3 |
01/02/2011 06:30 |
01/02/2011 13:00 |
4 |
03/02/2011 10:00 |
03/02/2011 16:30 |
1 |
03/02/2011 11:00 |
03/02/2011 17:30 |
3 |
03/02/2011 12:00 |
03/02/2011 18:30 |
2 |
03/02/2011 12:09 |
03/02/2011 12:49 |
4 |
05/02/2011 13:30 |
05/02/2011 22:00 |
1 |
05/02/2011 14:30 |
05/02/2011 23:30 |
3 |
05/02/2011 15:30 |
05/02/2011 23:30 |
2 |
05/02/2011 18:25 |
05/02/2011 19:05 |
4 |
07/02/2011 22:00 |
08/02/2011 06:30 |
1 |
07/02/2011 23:00 |
08/02/2011 07:30 |
3 |
08/02/2011 00:00 |
08/02/2011 08:00 |
2 |
08/02/2011 00:42 |
08/02/2011 01:21 |
4 |
10/02/2011 06:00 |
10/02/2011 12:00 |
2 |
10/02/2011 06:57 |
10/02/2011 07:37 |
1 |
10/02/2011 07:00 |
10/02/2011 13:00 |
3 |
10/02/2011 07:30 |
10/02/2011 14:00 |
4 |
12/02/2011 12:00 |
12/02/2011 18:00 |
1 |
12/02/2011 13:00 |
12/02/2011 19:00 |
2 |
12/02/2011 13:12 |
12/02/2011 13:51 |
3 |
12/02/2011 14:00 |
12/02/2011 20:00 |
4 |
14/02/2011 14:30 |
14/02/2011 22:30 |
1 |
14/02/2011 15:30 |
14/02/2011 23:30 |
3 |
14/02/2011 18:30 |
15/02/2011 04:30 |
2 |
14/02/2011 19:27 |
14/02/2011 20:06 |
4 |
17/02/2011 01:00 |
17/02/2011 08:00 |
2 |
17/02/2011 01:43 |
17/02/2011 02:22 |
1 |
17/02/2011 02:00 |
17/02/2011 09:00 |
3 |
17/02/2011 03:00 |
17/02/2011 10:00 |
4 |
19/02/2011 07:00 |
19/02/2011 13:00 |
1 |
19/02/2011 08:00 |
19/02/2011 14:00 |
2 |
19/02/2011 08:00 |
19/02/2011 08:39 |
3 |
19/02/2011 09:00 |
19/02/2011 15:00 |
4 |
21/02/2011 11:30 |
21/02/2011 18:30 |
1 |
21/02/2011 12:30 |
21/02/2011 19:30 |
3 |
21/02/2011 13:30 |
21/02/2011 20:30 |
2 |
21/02/2011 14:17 |
21/02/2011 14:56 |
4 |
23/02/2011 16:00 |
24/02/2011 01:00 |
1 |
23/02/2011 17:00 |
24/02/2011 01:30 |
3 |
23/02/2011 18:00 |
24/02/2011 01:30 |
2 |
23/02/2011 20:33 |
23/02/2011 21:12 |
4 |
26/02/2011 01:00 |
26/02/2011 08:00 |
1 |
26/02/2011 02:00 |
26/02/2011 09:00 |
2 |
26/02/2011 02:49 |
26/02/2011 03:27 |
3 |
26/02/2011 03:00 |
26/02/2011 10:00 |
4 |
28/02/2011 04:00 |
28/02/2011 15:00 |
1 |
28/02/2011 05:00 |
28/02/2011 16:00 |
3 |
28/02/2011 06:00 |
28/02/2011 17:00 |
2 |
28/02/2011 09:04 |
28/02/2011 09:42 |
4 |
02/03/2011 12:30 |
02/03/2011 20:00 |
1 |
02/03/2011 13:30 |
02/03/2011 21:30 |
3 |
02/03/2011 14:00 |
02/03/2011 21:30 |
2 |
02/03/2011 15:19 |
02/03/2011 15:58 |
4 |
04/03/2011 20:30 |
05/03/2011 05:00 |
1 |
04/03/2011 21:30 |
05/03/2011 06:00 |
2 |
04/03/2011 21:36 |
04/03/2011 22:14 |
3 |
04/03/2011 22:30 |
05/03/2011 07:00 |
4 |
07/03/2011 02:00 |
07/03/2011 09:00 |
1 |
07/03/2011 03:00 |
07/03/2011 10:00 |
2 |
07/03/2011 03:52 |
07/03/2011 04:31 |
3 |
07/03/2011 04:00 |
07/03/2011 11:00 |
4 |
09/03/2011 08:00 |
09/03/2011 15:00 |
1 |
09/03/2011 09:00 |
09/03/2011 16:00 |
3 |
09/03/2011 10:00 |
09/03/2011 17:00 |
2 |
09/03/2011 10:08 |
09/03/2011 10:47 |
4 |
11/03/2011 11:00 |
11/03/2011 20:00 |
1 |
11/03/2011 12:00 |
11/03/2011 21:00 |
3 |
11/03/2011 13:00 |
11/03/2011 22:00 |
2 |
11/03/2011 16:23 |
11/03/2011 17:02 |
4 |
13/03/2011 21:00 |
14/03/2011 05:30 |
1 |
13/03/2011 22:00 |
14/03/2011 06:30 |
2 |
13/03/2011 22:38 |
13/03/2011 23:17 |
3 |
13/03/2011 23:00 |
14/03/2011 07:30 |
4 |
16/03/2011 03:30 |
16/03/2011 10:00 |
1 |
16/03/2011 04:30 |
16/03/2011 11:00 |
2 |
16/03/2011 04:54 |
16/03/2011 05:33 |
3 |
16/03/2011 05:30 |
16/03/2011 12:00 |
4 |
18/03/2011 10:00 |
18/03/2011 16:00 |
1 |
18/03/2011 11:00 |
18/03/2011 17:00 |
2 |
18/03/2011 11:11 |
18/03/2011 11:50 |
3 |
18/03/2011 12:00 |
18/03/2011 18:00 |
4 |
20/03/2011 16:30 |
20/03/2011 21:30 |
2 |
20/03/2011 17:28 |
20/03/2011 18:07 |
1 |
20/03/2011 17:30 |
20/03/2011 22:30 |
3 |
20/03/2011 18:30 |
20/03/2011 23:30 |
4 |
22/03/2011 22:00 |
23/03/2011 06:00 |
1 |
22/03/2011 23:00 |
23/03/2011 07:00 |
2 |
22/03/2011 23:44 |
23/03/2011 00:24 |
3 |
23/03/2011 00:00 |
23/03/2011 08:00 |
4 |
25/03/2011 05:00 |
25/03/2011 11:00 |
2 |
25/03/2011 05:59 |
25/03/2011 06:39 |
1 |
25/03/2011 06:00 |
25/03/2011 12:00 |
3 |
25/03/2011 07:00 |
25/03/2011 13:00 |
4 |
27/03/2011 09:30 |
27/03/2011 17:00 |
1 |
27/03/2011 10:30 |
27/03/2011 18:00 |
3 |
27/03/2011 11:30 |
27/03/2011 19:00 |
2 |
27/03/2011 12:14 |
27/03/2011 12:54 |
1 |
29/03/2011 15:00 |
29/03/2011 23:30 |
10 |
4 |
29/03/2011 16:05 |
29/03/2011 23:00 |
10 |
3 |
29/03/2011 16:45 |
29/03/2011 23:30 |
10 |
2 |
29/03/2011 18:29 |
29/03/2011 19:09 |
4 |
31/03/2011 22:30 |
01/04/2011 06:30 |
1 |
31/03/2011 23:30 |
01/04/2011 07:30 |
3 |
01/04/2011 00:30 |
01/04/2011 08:30 |
2 |
01/04/2011 00:45 |
01/04/2011 01:26 |
1 |
03/04/2011 03:40 |
03/04/2011 14:30 |
11 |
3 |
03/04/2011 04:50 |
03/04/2011 13:30 |
11 |
4 |
03/04/2011 04:30 |
03/04/2011 12:30 |
2 |
03/04/2011 07:02 |
03/04/2011 07:42 |
4 |
05/04/2011 09:30 |
05/04/2011 17:15 |
1 |
05/04/2011 10:30 |
05/04/2011 18:15 |
3 |
05/04/2011 11:30 |
05/04/2011 19:15 |
2 |
05/04/2011 13:17 |
05/04/2011 13:58 |
4 |
07/04/2011 18:30 |
08/04/2011 03:00 |
1 |
07/04/2011 19:30 |
08/04/2011 04:00 |
2 |
07/04/2011 19:32 |
07/04/2011 20:13 |
3 |
07/04/2011 20:30 |
08/04/2011 05:00 |
4 |
10/04/2011 00:00 |
10/04/2011 07:00 |
1 |
10/04/2011 01:00 |
10/04/2011 08:00 |
2 |
10/04/2011 01:47 |
10/04/2011 02:28 |
3 |
10/04/2011 02:00 |
10/04/2011 09:00 |
4 |
12/04/2011 06:00 |
12/04/2011 13:00 |
1 |
12/04/2011 07:00 |
12/04/2011 14:00 |
3 |
12/04/2011 08:00 |
12/04/2011 15:00 |
2 |
12/04/2011 08:02 |
12/04/2011 08:44 |
4 |
14/04/2011 09:30 |
14/04/2011 18:30 |
1 |
14/04/2011 10:30 |
14/04/2011 19:30 |
3 |
14/04/2011 11:30 |
14/04/2011 20:30 |
2 |
14/04/2011 14:18 |
14/04/2011 15:00 |
4 |
16/04/2011 20:00 |
17/04/2011 03:30 |
2 |
16/04/2011 20:34 |
16/04/2011 21:17 |
1 |
16/04/2011 21:00 |
17/04/2011 04:30 |
3 |
16/04/2011 22:00 |
17/04/2011 05:30 |
4 |
18/04/2011 20:30 |
19/04/2011 08:00 |
9 |
1 |
18/04/2011 21:30 |
19/04/2011 09:00 |
9 |
2 |
19/04/2011 02:50 |
19/04/2011 03:33 |
3 |
18/04/2011 22:30 |
19/04/2011 10:00 |
9 |
4 |
21/04/2011 07:00 |
21/04/2011 14:00 |
12 |
1 |
21/04/2011 08:00 |
21/04/2011 15:00 |
12 |
2 |
21/04/2011 07:45 |
21/04/2011 09:48 |
12 |
3 |
21/04/2011 09:00 |
21/04/2011 16:00 |
12 |
4 |
23/04/2011 11:00 |
23/04/2011 19:00 |
1 |
23/04/2011 15:00 |
24/04/2011 00:00 |
2 |
23/04/2011 15:19 |
23/04/2011 16:03 |
3 |
23/04/2011 16:00 |
24/04/2011 01:00 |
4 |
25/04/2011 20:30 |
26/04/2011 03:30 |
1 |
25/04/2011 21:30 |
26/04/2011 04:30 |
2 |
25/04/2011 21:33 |
25/04/2011 22:18 |
3 |
25/04/2011 22:30 |
26/04/2011 05:30 |
4 |
28/04/2011 02:00 |
28/04/2011 09:00 |
1 |
28/04/2011 03:00 |
28/04/2011 10:00 |
2 |
28/04/2011 03:48 |
28/04/2011 04:33 |
3 |
28/04/2011 04:00 |
28/04/2011 11:00 |
4 |
30/04/2011 07:00 |
30/04/2011 15:00 |
1 |
30/04/2011 08:00 |
30/04/2011 16:00 |
3 |
30/04/2011 09:00 |
30/04/2011 17:00 |
2 |
30/04/2011 10:04 |
30/04/2011 10:49 |
2 |
02/05/2011 10:00 |
02/05/2011
21:00 |
4 |
02/05/2011 10:00 |
02/05/2011 21:00 |
1 |
02/05/2011 11:00 |
02/05/2011 21:30 |
3 |
02/05/2011 16:00 |
03/05/2011 00:00 |
2 |
04/05/2011 21:00 |
05/05/2011 04:00 |
4 |
04/05/2011 21:00 |
05/05/2011 04:00 |
1 |
04/05/2011 22:00 |
05/05/2011 06:00 |
3 |
04/05/2011 23:00 |
05/05/2011 05:00 |
2 |
07/05/2011 02:30 |
07/05/2011 12:00 |
4 |
07/05/2011 02:30 |
07/05/2011 12:00 |
1 |
07/05/2011 03:30 |
07/05/2011 13:00 |
3 |
07/05/2011 04:30 |
07/05/2011 14:00 |
2 |
09/05/2011 07:30 |
09/05/2011 15:30 |
4 |
09/05/2011 07:30 |
09/05/2011 15:30 |
1 |
09/05/2011 08:30 |
09/05/2011 16:30 |
3 |
09/05/2011 09:30 |
09/05/2011 17:30 |
2 |
11/05/2011 16:30 |
12/05/2011 01:00 |
4 |
11/05/2011 16:30 |
12/05/2011 01:00 |
1 |
11/05/2011 17:30 |
12/05/2011 02:00 |
3 |
11/05/2011 18:30 |
12/05/2011 01:00 |
2 |
13/05/2011 22:30 |
14/05/2011 05:00 |
4 |
13/05/2011 22:30 |
14/05/2011 05:00 |
1 |
13/05/2011 23:30 |
14/05/2011 06:00 |
3 |
14/05/2011 00:30 |
14/05/2011 07:00 |
2 |
16/05/2011 04:00 |
16/05/2011 11:30 |
4 |
16/05/2011 04:00 |
16/05/2011 11:30 |
1 |
16/05/2011 05:00 |
16/05/2011 12:30 |
3 |
16/05/2011 06:00 |
16/05/2011 13:30 |
2 |
18/05/2011 07:00 |
18/05/2011 17:00 |
4 |
18/05/2011 07:00 |
18/05/2011 17:00 |
1 |
18/05/2011 08:00 |
18/05/2011 18:00 |
3 |
18/05/2011 09:00 |
18/05/2011 19:00 |
2 |
20/05/2011 17:00 |
21/05/2011 01:00 |
4 |
20/05/2011 17:00 |
21/05/2011 01:00 |
1 |
20/05/2011 18:00 |
21/05/2011 02:00 |
3 |
20/05/2011 19:00 |
21/05/2011 03:00 |
2 |
22/05/2011 23:00 |
23/05/2011 06:00 |
4 |
22/05/2011 23:00 |
23/05/2011 06:00 |
1 |
23/05/2011 00:00 |
23/05/2011 07:00 |
3 |
23/05/2011 01:00 |
23/05/2011 08:00 |
2 |
25/05/2011 04:30 |
25/05/2011 12:00 |
13 |
4 |
25/05/2011 05:00 |
25/05/2011 12:00 |
1 |
25/05/2011 06:00 |
25/05/2011 13:00 |
3 |
25/05/2011 07:00 |
25/05/2011 14:00 |
2 |
27/05/2011 08:30 |
27/05/2011 17:00 |
4 |
27/05/2011 08:30 |
27/05/2011 17:00 |
1 |
27/05/2011 09:30 |
27/05/2011 18:00 |
3 |
27/05/2011 13:00 |
27/05/2011 22:30 |
2 |
29/05/2011 18:00 |
30/05/2011 01:00 |
4 |
29/05/2011 18:00 |
30/05/2011 01:00 |
1 |
29/05/2011 19:00 |
30/05/2011 02:00 |
3 |
29/05/2011 20:00 |
30/05/2011 03:00 |
2 |
01/06/2011 00:30 |
01/06/2011 07:30 |
4 |
01/06/2011 00:30 |
01/06/2011 07:30 |
1 |
01/06/2011 01:30 |
01/06/2011 08:30 |
3 |
01/06/2011 02:30 |
01/06/2011 09:30 |
2 |
03/06/2011 05:30 |
03/06/2011 13:00 |
4 |
03/06/2011 05:30 |
03/06/2011 13:00 |
1 |
03/06/2011 06:30 |
03/06/2011 14:00 |
3 |
03/06/2011 07:30 |
03/06/2011 15:00 |
2 |
05/06/2011 07:00 |
05/06/2011 17:30 |
4 |
05/06/2011 07:00 |
05/06/2011 17:30 |
1 |
05/06/2011 08:00 |
05/06/2011 18:30 |
3 |
05/06/2011 09:00 |
05/06/2011 19:30 |
2 |
07/06/2011 19:00 |
08/06/2011 02:00 |
4 |
07/06/2011 19:00 |
08/06/2011 02:00 |
1 |
07/06/2011 20:00 |
08/06/2011 03:00 |
3 |
07/06/2011 21:00 |
08/06/2011 04:00 |
2 |
10/06/2011 01:30 |
10/06/2011 09:00 |
4 |
10/06/2011 01:30 |
10/06/2011 09:00 |
1 |
10/06/2011 02:30 |
10/06/2011 10:00 |
3 |
10/06/2011 03:30 |
10/06/2011 11:00 |
2 |
12/06/2011 05:30 |
12/06/2011 13:30 |
4 |
12/06/2011 05:30 |
12/06/2011 13:30 |
1 |
12/06/2011 06:30 |
12/06/2011 14:30 |
3 |
12/06/2011 07:30 |
12/06/2011 15:30 |
2 |
14/06/2011 14:00 |
14/06/2011 22:30 |
4 |
14/06/2011 14:00 |
14/06/2011 22:30 |
1 |
14/06/2011 15:00 |
14/06/2011 23:30 |
3 |
14/06/2011 16:00 |
15/06/2011 00:30 |
2 |
16/06/2011 20:00 |
17/06/2011 03:00 |
4 |
16/06/2011 20:00 |
17/06/2011 03:00 |
1 |
16/06/2011 21:00 |
17/06/2011 04:00 |
3 |
16/06/2011 22:00 |
17/06/2011 05:00 |
2 |
19/06/2011 02:30 |
19/06/2011 09:30 |
4 |
19/06/2011 02:30 |
19/06/2011 09:30 |
1 |
19/06/2011 03:30 |
19/06/2011 10:30 |
3 |
19/06/2011 04:30 |
19/06/2011 11:30 |
2 |
21/06/2011 05:30 |
21/06/2011 14:30 |
4 |
21/06/2011 05:30 |
21/06/2011 14:30 |
1 |
21/06/2011 06:30 |
21/06/2011 15:30 |
3 |
21/06/2011 07:30 |
21/06/2011 16:30 |
2 |
23/06/2011 14:30 |
23/06/2011 22:00 |
4 |
23/06/2011 14:30 |
23/06/2011 22:00 |
1 |
23/06/2011 15:30 |
23/06/2011 23:00 |
3 |
23/06/2011 16:30 |
24/06/2011 00:00 |
2 |
25/06/2011 19:00 |
26/06/2011 05:00 |
4 |
25/06/2011 19:00 |
26/06/2011 05:00 |
1 |
25/06/2011 20:00 |
26/06/2011 06:00 |
3 |
25/06/2011 21:00 |
26/06/2011 07:00 |
2 |
28/06/2011 03:00 |
28/06/2011 10:00 |
4 |
28/06/2011 03:00 |
28/06/2011 10:00 |
1 |
28/06/2011 04:00 |
28/06/2011 11:00 |
3 |
28/06/2011 05:00 |
28/06/2011 12:00 |
2 |
30/06/2011 05:00 |
30/06/2011 15:00 |
4 |
30/06/2011 05:00 |
30/06/2011 15:00 |
1 |
30/06/2011 06:00 |
30/06/2011 16:00 |
3 |
30/06/2011 07:00 |
30/06/2011 17:00 |
2 |
02/07/2011 15:30 |
02/07/2011 23:30 |
4 |
02/07/2011 15:30 |
02/07/2011 23:30 |
1 |
02/07/2011 16:30 |
03/07/2011 00:30 |
3 |
02/07/2011 17:30 |
03/07/2011 01:30 |
2 |
04/07/2011 22:00 |
05/07/2011 05:00 |
4 |
04/07/2011 22:00 |
05/07/2011 05:00 |
1 |
04/07/2011 23:00 |
05/07/2011 06:00 |
3 |
05/07/2011 00:00 |
05/07/2011 07:00 |
2 |
07/07/2011 03:00 |
07/07/2011 10:30 |
4 |
07/07/2011 03:00 |
07/07/2011 10:30 |
1 |
07/07/2011 04:00 |
07/07/2011 11:30 |
3 |
07/07/2011 05:00 |
07/07/2011 12:30 |
2 |
09/07/2011 05:00 |
09/07/2011 16:00 |
4 |
09/07/2011 05:00 |
09/07/2011 16:30 |
1 |
09/07/2011 06:00 |
09/07/2011 17:00 |
3 |
09/07/2011 07:00 |
09/07/2011 21:00 |
2 |
11/07/2011 16:00 |
12/07/2011 00:00 |
4 |
11/07/2011 16:00 |
12/07/2011 00:00 |
1 |
11/07/2011 17:00 |
12/07/2011 01:00 |
3 |
11/07/2011 18:00 |
12/07/2011 02:00 |
2 |
13/07/2011 21:00 |
14/07/2011 07:00 |
4 |
13/07/2011 21:00 |
14/07/2011 07:00 |
1 |
13/07/2011 22:00 |
14/07/2011 08:00 |
3 |
13/07/2011 23:00 |
14/07/2011 09:00 |
2 |
16/07/2011 03:00 |
16/07/2011 11:00 |
4 |
16/07/2011 03:00 |
16/07/2011 11:00 |
1 |
16/07/2011 04:00 |
16/07/2011 12:00 |
3 |
16/07/2011 05:00 |
16/07/2011 13:00 |
2 |
18/07/2011 11:00 |
18/07/2011 20:30 |
4 |
18/07/2011 11:00 |
18/07/2011 20:30 |
1 |
18/07/2011 12:00 |
18/07/2011 21:30 |
3 |
18/07/2011 13:00 |
18/07/2011 22:30 |
4 |
20/07/2011 17:00 |
21/07/2011 00:00 |
1 |
20/07/2011 18:00 |
21/07/2011 01:00 |
3 |
20/07/2011 19:00 |
21/07/2011 02:00 |
4 |
22/07/2011 23:30 |
23/07/2011 06:30 |
1 |
23/07/2011 00:30 |
23/07/2011 07:30 |
3 |
23/07/2011 01:30 |
23/07/2011 08:30 |
Attitude manoeuvres, April 2011
In April 2011, there will be a series of manoeuvres to adjust the attitudes of the spacecraft
to keep these within operational limits with respect to the Sun.
The manoeuvre times are shown below.
21 Apr, 08:00 (sc 4)
21 Apr, 08:45 (sc 2)
21 Apr, 09:00 (sc 1)
21 Apr, 10:00 (sc 3)
These times fall at or close to the start of the eclipse payload-off periods for these spacecraft, so
to provide manoeuvre protection the nominal start of the eclipse
payload-off period has been brought forward to start one hour before the manoeuvre.
These will be followed by trim manoeuvres on 7 May as follows:
07 May, 04:35 (sc 2)
07 May, 05:00 (sc 4)
07 May, 05:20 (sc 1)
07 May, 06:45 (sc 3)
These times fall well inside the eclipse payload-off periods for these spacecraft, so
no adjustments are required.
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre burns.
Trim manoeuvre, May 2011
In May 2011, there will be a trim manoeuvre on Clsuter 2 to adjust for orbit drag.
The manoeuvre times are shown below.
25 May, 05:30 (sc 2)
This time falls close to the start of the eclipse payload-off period for this spacecraft, so
to provide manoeuvre protection the nominal start of the eclipse
payload-off period has been brought forward to start 30 minutes before the manoeuvre.
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre burn.
Orbit and attitude manoeuvres, July/September 2011
In July, August and September 2011, there will be a series of manoeuvres to adjust the orbits of the spacecraft
and also
to keep their attitudes within operational limits with respect to the Sun.
The manoeuvre times and the surrounding no-data-taking periods are shown in the table below. In general, we stop data-taking from
1 hour before each manoeuvre until 7 hours after each manoeuvre. But this may be reduced to retain existing WBD operations if these
are not overlapping or very close to the manoeuvre burns.
However, the instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre burns.
Notes
1. The no-data-taking period on C2 on 25 July starts only 12 minutes before the manoeuvre. This allows us to retain a
high-priority BM2 period planned to end at 0810.
2. There are two manoeuvres on C3 on 25 July. These are consolidated into a single no-data-taking period.
3. The no-data-taking periods on C1, C2 and C4 on 26 August start only 33, 39 and 26 minutes respectively
before the manoeuvre burn for their spacecraft. This allows us to retain a high-priority BM2 period planned to end at 0035.
4. The manoeuvres on all four spacecraft on 1 September are very close in time, so the
no-data-taking periods have been consolidated into a single period. This starts only 50 and 53 minutes
before the manoeuvre burns on C1 and C3/C4 respectively. This allows us to retain
a high priority BM1 period planned to end at 1900.
S/c |
Payload to no data-taking |
Manoeuvre start |
Manoeuvre end |
Data-taking restarts |
See note |
2 |
20/07/2011 18:33 |
20/07/2011 19:33 |
20/07/2011 19:34 |
21/07/2011 02:34 |
|
2 |
25/07/2011 08:20 |
25/07/2011 08:32 |
25/07/2011 08:41 |
25/07/2011 11:50 |
1 |
4 |
25/07/2011 09:15 |
25/07/2011 10:15 |
25/07/2011 10:19 |
25/07/2011 11:30 |
|
3 |
25/07/2011 10:10 |
25/07/2011 11:10 |
25/07/2011 11:18 |
|
2 |
3 |
|
25/07/2011 12:00 |
25/07/2011 12:02 |
25/07/2011 14:50 |
|
1 |
25/07/2011 11:30 |
25/07/2011 12:07 |
25/07/2011 12:15 |
25/07/2011 12:50 |
|
3 |
31/07/2011 02:26 |
31/07/2011 03:26 |
31/07/2011 03:30 |
31/07/2011 10:30 |
|
2 |
05/08/2011 15:02 |
05/08/2011 16:02 |
05/08/2011 16:03 |
05/08/2011 16:45 |
|
4 |
05/08/2011 15:46 |
05/08/2011 16:46 |
05/08/2011 16:47 |
05/08/2011 18:47 |
|
1 |
05/08/2011 16:07 |
05/08/2011 17:07 |
05/08/2011 17:08 |
06/08/2011 00:08 |
|
3 |
05/08/2011 16:44 |
05/08/2011 17:44 |
05/08/2011 17:45 |
06/08/2011 00:45 |
|
3 |
|
25/07/2011 12:00 |
25/07/2011 12:02 |
25/07/2011 14:50 |
|
1 |
25/07/2011 11:30 |
25/07/2011 12:07 |
25/07/2011 12:15 |
25/07/2011 12:50 |
|
3 |
31/07/2011 02:26 |
31/07/2011 03:26 |
31/07/2011 03:30 |
31/07/2011 10:30 |
|
2 |
05/08/2011 15:02 |
05/08/2011 16:02 |
05/08/2011 16:03 |
05/08/2011 16:45 |
|
4 |
05/08/2011 15:46 |
05/08/2011 16:46 |
05/08/2011 16:47 |
05/08/2011 18:47 |
|
1 |
05/08/2011 16:07 |
05/08/2011 17:07 |
05/08/2011 17:08 |
06/08/2011 00:08 |
|
3 |
05/08/2011 16:44 |
05/08/2011 17:44 |
05/08/2011 17:45 |
06/08/2011 00:45 |
|
1 |
21/08/2011 11:48 |
21/08/2011 12:48 |
21/08/2011 12:49 |
21/08/2011 15:05 |
|
2 |
21/08/2011 11:51 |
21/08/2011 12:51 |
21/08/2011 12:53 |
21/08/2011 15:05 |
|
3 |
21/08/2011 12:14 |
21/08/2011 13:14 |
21/08/2011 13:16 |
21/08/2011 20:16 |
|
4 |
26/08/2011 00:48 |
26/08/2011 01:14 |
26/08/2011 01:15 |
26/08/2011 08:15 |
3 |
1 |
26/08/2011 00:48 |
26/08/2011 01:21 |
26/08/2011 01:22 |
26/08/2011 08:22 |
3 |
2 |
26/08/2011 00:45 |
26/08/2011 01:24 |
26/08/2011 01:25 |
26/08/2011 03:12 |
3 |
3 |
26/08/2011 00:45 |
26/08/2011 01:45 |
26/08/2011 01:46 |
26/08/2011 08:46 |
|
1 |
01/09/2011 19:20 |
01/09/2011 20:10 |
01/09/2011 20:11 |
02/09/2011 03:36 |
4 |
3 |
01/09/2011 19:20 |
01/09/2011 20:13 |
01/09/2011 20:14 |
02/09/2011 03:36 |
4 |
4 |
01/09/2011 19:20 |
01/09/2011 20:13 |
01/09/2011 20:14 |
02/09/2011 03:36 |
4 |
2 |
01/09/2011 19:20 |
01/09/2011 20:25 |
01/09/2011 20:26 |
02/09/2011 03:36 |
4 |
Attitude manoeuvres, November 2011
In November 2011, there will be a series of manoeuvres to adjust the attitudes of the spacecraft
to keep these within operational limits with respect to the Sun.
The manoeuvre times are shown below.
11 Nov, 08:45 (sc 1)
11 Nov, 09:55 (sc 2)
11 Nov, 11:05 (sc 3)
11 Nov, 12:15 (sc 4)
These will be followed by trim manoeuvres as follows:
17 Nov, 17:28 (sc 1)
17 Nov, 17:43 (sc 2)
17 Nov, 17:28 (sc 3)
17 Nov, 17:28 (sc 4)
As those instruments sensitive to manoeuvres must be put in safe modes around the manoeuvres,
there will be no data-taking on all four spacecraft around these two sets of manoeuvres:
(a) from 07:45 to 19:15 on 11 Nov and (b) from 16:29 to 20:51 on 17 Nov. The short no-data-taking
period on 17 Nov preserves a planned group of WBD operations on sc 1, 3 and 4, starting at 21:23.
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre burns.
Long eclipses 2011-2012
The Cluster spacecraft will experience a series of umbral eclipses
between 29 November 2011 and 10 April 2012. There will not be enough power to
operate
the payloads in these periods, so they will
switched off as shown in the table below.
Notes
1. The switch-on of spacecraft 2 is delayed until 05:05 to avoid start up during BM1 operations.
2. Eclipse periods on 16/17 Dec and 01/02 Jan extended due to ground station constraints at Kourou.
3. Eclipse periods on 22 Jan, 26 Jan, 02 Feb, 22 Feb, 24 Feb. 29 Feb and
7 Mar extended to cover manoeuvres.
Spacecraft |
Payload off |
Payload on |
Notes |
2 |
29/11/2011 01:11 |
29/11/2011 01:46 |
|
2 |
01/12/2011 07:24 |
01/12/2011 08:05 |
|
2 |
03/12/2011 13:38 |
03/12/2011 14:22 |
|
2 |
05/12/2011 19:52 |
05/12/2011 20:39 |
|
2 |
07/12/2011 20:30 |
08/12/2011 05:05 |
1 |
2 |
10/12/2011 07:00 |
10/12/2011 12:00 |
|
2 |
12/12/2011 13:30 |
12/12/2011 20:30 |
|
4 |
14/12/2011 15:30 |
15/12/2011 00:00 |
|
3 |
14/12/2011 16:30 |
15/12/2011 01:00 |
|
1 |
14/12/2011 17:30 |
15/12/2011 02:00 |
|
2 |
14/12/2011 18:30 |
14/12/2011 23:00 |
|
4 |
16/12/2011 17:00 |
17/12/2011 10:00 |
2 |
3 |
16/12/2011 18:00 |
17/12/2011 11:00 |
2 |
1 |
16/12/2011 19:00 |
17/12/2011 12:00 |
2 |
2 |
16/12/2011 20:00 |
17/12/2011 09:00 |
2 |
4 |
19/12/2011 05:00 |
19/12/2011 15:00 |
|
3 |
19/12/2011 06:00 |
19/12/2011 16:00 |
|
1 |
19/12/2011 07:00 |
19/12/2011 17:00 |
|
2 |
19/12/2011 08:00 |
19/12/2011 14:00 |
|
4 |
21/12/2011 11:30 |
21/12/2011 20:30 |
|
3 |
21/12/2011 12:30 |
21/12/2011 21:30 |
|
1 |
21/12/2011 13:30 |
21/12/2011 22:30 |
|
2 |
21/12/2011 14:30 |
21/12/2011 19:30 |
|
4 |
23/12/2011 15:15 |
24/12/2011 02:30 |
|
3 |
23/12/2011 16:15 |
24/12/2011 03:30 |
|
1 |
23/12/2011 17:15 |
24/12/2011 04:30 |
|
2 |
23/12/2011 18:15 |
24/12/2011 01:30 |
|
4 |
26/12/2011 00:20 |
26/12/2011 10:00 |
|
3 |
26/12/2011 01:20 |
26/12/2011 11:00 |
|
1 |
26/12/2011 02:20 |
26/12/2011 12:00 |
|
2 |
26/12/2011 03:20 |
26/12/2011 09:00 |
|
4 |
28/12/2011 06:00 |
28/12/2011 16:00 |
|
3 |
28/12/2011 07:00 |
28/12/2011 17:00 |
|
1 |
28/12/2011 08:00 |
28/12/2011 18:00 |
|
2 |
28/12/2011 09:00 |
28/12/2011 15:00 |
|
4 |
30/12/2011 12:30 |
30/12/2011 22:30 |
|
3 |
30/12/2011 13:30 |
30/12/2011 23:30 |
|
1 |
30/12/2011 14:30 |
31/12/2011 00:30 |
|
2 |
30/12/2011 15:30 |
30/12/2011 21:30 |
|
4 |
01/01/2012 15:30 |
02/01/2012 06:30 |
2 |
3 |
01/01/2012 16:30 |
02/01/2012 07:30 |
2 |
1 |
01/01/2012 17:30 |
02/01/2012 08:30 |
2 |
2 |
01/01/2012 18:30 |
02/01/2012 02:00 |
2 |
4 |
04/01/2012 01:00 |
04/01/2012 11:00 |
|
3 |
04/01/2012 02:00 |
04/01/2012 12:00 |
|
1 |
04/01/2012 03:00 |
04/01/2012 13:00 |
|
2 |
04/01/2012 04:00 |
04/01/2012 10:00 |
|
4 |
06/01/2012 06:45 |
06/01/2012 16:30 |
|
3 |
06/01/2012 07:45 |
06/01/2012 17:30 |
|
1 |
06/01/2012 08:45 |
06/01/2012 18:30 |
|
2 |
06/01/2012 09:45 |
06/01/2012 15:30 |
|
4 |
08/01/2012 13:00 |
08/01/2012 22:00 |
|
3 |
08/01/2012 14:00 |
08/01/2012 23:00 |
|
1 |
08/01/2012 15:00 |
09/01/2012 00:00 |
|
2 |
08/01/2012 16:00 |
08/01/2012 21:00 |
|
2 |
10/01/2012 15:00 |
11/01/2012 02:15 |
|
4 |
10/01/2012 16:00 |
11/01/2012 03:15 |
|
1 |
10/01/2012 17:00 |
11/01/2012 04:15 |
|
3 |
10/01/2012 18:00 |
11/01/2012 07:00 |
|
2 |
13/01/2012 01:30 |
13/01/2012 10:30 |
|
4 |
13/01/2012 02:30 |
13/01/2012 11:30 |
|
1 |
13/01/2012 03:30 |
13/01/2012 12:30 |
|
3 |
13/01/2012 04:30 |
13/01/2012 13:30 |
|
2 |
15/01/2012 08:00 |
15/01/2012 16:00 |
|
4 |
15/01/2012 09:00 |
15/01/2012 18:00 |
|
1 |
15/01/2012 10:00 |
15/01/2012 18:00 |
|
3 |
15/01/2012 11:00 |
15/01/2012 19:00 |
|
2 |
17/01/2012 13:00 |
17/01/2012 22:00 |
|
4 |
17/01/2012 14:00 |
17/01/2012 23:00 |
|
1 |
17/01/2012 15:00 |
18/01/2012 00:00 |
|
3 |
17/01/2012 16:00 |
18/01/2012 00:00 |
|
4 |
19/01/2012 18:00 |
20/01/2012 08:00 |
|
2 |
19/01/2012 21:00 |
20/01/2012 07:00 |
|
1 |
19/01/2012 22:00 |
20/01/2012 09:00 |
|
3 |
19/01/2012 23:00 |
20/01/2012 10:00 |
|
2 |
22/01/2012 02:30 |
22/01/2012 11:00 |
|
4 |
22/01/2012 03:30 |
22/01/2012 12:00 |
|
3 |
22/01/2012 04:30 |
22/01/2012 17:00 |
3 |
1 |
22/01/2012 05:30 |
22/01/2012 14:00 |
|
2 |
24/01/2012 09:00 |
24/01/2012 17:00 |
|
4 |
24/01/2012 10:00 |
24/01/2012 18:00 |
|
1 |
24/01/2012 11:00 |
24/01/2012 19:00 |
|
3 |
24/01/2012 12:00 |
24/01/2012 20:00 |
|
2 |
26/01/2012 13:00 |
26/01/2012 22:30 |
|
4 |
26/01/2012 14:00 |
26/01/2012 23:30 |
|
1 |
26/01/2012 15:00 |
27/01/2012 00:30 |
|
3 |
26/01/2012 14:43 |
27/01/2012 01:30 |
3 |
2 |
28/01/2012 21:00 |
29/01/2012 07:00 |
|
4 |
28/01/2012 22:00 |
29/01/2012 08:00 |
|
1 |
28/01/2012 23:00 |
29/01/2012 09:00 |
|
3 |
29/01/2012 00:00 |
29/01/2012 10:00 |
|
2 |
31/01/2012 04:00 |
31/01/2012 12:00 |
|
4 |
31/01/2012 05:00 |
31/01/2012 13:00 |
|
3 |
31/01/2012 06:00 |
31/01/2012 14:00 |
|
1 |
31/01/2012 07:00 |
31/01/2012 15:00 |
|
2 |
02/02/2012 10:00 |
02/02/2012 19:00 |
|
4 |
02/02/2012 11:00 |
02/02/2012 20:00 |
|
1 |
02/02/2012 12:00 |
02/02/2012 21:00 |
|
3 |
02/02/2012 09:30 |
02/02/2012 22:00 |
3 |
2 |
04/02/2012 15:00 |
04/02/2012 23:30 |
4 |
04/02/2012 16:00 |
05/02/2012 00:30 |
1 |
04/02/2012 17:00 |
05/02/2012 01:30 |
3 |
04/02/2012 18:00 |
05/02/2012 02:30 |
2 |
06/02/2012 23:00 |
07/02/2012 08:00 |
4 |
07/02/2012 00:00 |
07/02/2012 09:00 |
1 |
07/02/2012 01:00 |
07/02/2012 10:00 |
3 |
07/02/2012 02:00 |
07/02/2012 11:00 |
2 |
09/02/2012 05:00 |
09/02/2012 13:30 |
4 |
09/02/2012 06:00 |
09/02/2012 14:30 |
1 |
09/02/2012 07:00 |
09/02/2012 15:30 |
3 |
09/02/2012 08:00 |
09/02/2012 16:30 |
2 |
11/02/2012 11:00 |
11/02/2012 19:00 |
4 |
11/02/2012 12:00 |
11/02/2012 20:00 |
1 |
11/02/2012 13:00 |
11/02/2012 21:00 |
3 |
11/02/2012 14:00 |
11/02/2012 22:00 |
2 |
13/02/2012 13:00 |
14/02/2012 00:30 |
4 |
13/02/2012 14:00 |
14/02/2012 01:30 |
1 |
13/02/2012 15:00 |
14/02/2012 02:30 |
3 |
13/02/2012 16:00 |
14/02/2012 05:00 |
2 |
16/02/2012 00:00 |
16/02/2012 09:00 |
4 |
16/02/2012 01:00 |
16/02/2012 10:00 |
1 |
16/02/2012 02:00 |
16/02/2012 11:00 |
3 |
16/02/2012 03:00 |
16/02/2012 12:00 |
2 |
18/02/2012 07:00 |
18/02/2012 14:30 |
4 |
18/02/2012 08:00 |
18/02/2012 15:30 |
1 |
18/02/2012 09:00 |
18/02/2012 16:30 |
3 |
18/02/2012 09:30 |
18/02/2012 17:30 |
2 |
20/02/2012 11:30 |
20/02/2012 19:30 |
4 |
20/02/2012 12:30 |
20/02/2012 20:30 |
1 |
20/02/2012 13:30 |
20/02/2012 21:30 |
3 |
20/02/2012 14:30 |
20/02/2012 22:30 |
2 |
22/02/2012 19:00 |
23/02/2012 03:00 |
4 |
22/02/2012 20:00 |
23/02/2012 04:00 |
1 |
22/02/2012 21:00 |
23/02/2012 05:00 |
3 |
22/02/2012 20:46 |
23/02/2012 06:00 |
3 |
2 |
24/02/2012 21:00 |
25/02/2012 09:00 |
3 |
4 |
24/02/2012 21:00 |
25/02/2012 10:00 |
3 |
1 |
24/02/2012 21:00 |
25/02/2012 11:00 |
3 |
3 |
25/02/2012 04:00 |
25/02/2012 12:00 |
2 |
27/02/2012 07:30 |
27/02/2012 15:00 |
4 |
27/02/2012 08:30 |
27/02/2012 16:00 |
1 |
27/02/2012 09:30 |
27/02/2012 17:00 |
3 |
27/02/2012 10:30 |
27/02/2012 18:00 |
2 |
29/02/2012 11:30 |
29/02/2012 21:30 |
4 |
29/02/2012 12:30 |
29/02/2012 22:30 |
1 |
29/02/2012 13:30 |
29/02/2012 23:30 |
3 |
29/02/2012 12:50 |
01/03/2012 00:30 |
3 |
2 |
02/03/2012 20:30 |
03/03/2012 05:00 |
4 |
02/03/2012 21:30 |
03/03/2012 06:00 |
1 |
02/03/2012 22:30 |
03/03/2012 07:00 |
3 |
02/03/2012 23:30 |
03/03/2012 08:00 |
2 |
05/03/2012 02:30 |
05/03/2012 10:00 |
4 |
05/03/2012 03:30 |
05/03/2012 11:00 |
1 |
05/03/2012 04:30 |
05/03/2012 12:00 |
3 |
05/03/2012 05:30 |
05/03/2012 13:00 |
2 |
07/03/2012 08:30 |
07/03/2012 17:30 |
4 |
07/03/2012 09:30 |
07/03/2012 18:30 |
1 |
07/03/2012 10:30 |
07/03/2012 19:30 |
3 |
07/03/2012 10:00 |
07/03/2012 20:30 |
3 |
2 |
09/03/2012 13:00 |
09/03/2012 21:30 |
4 |
09/03/2012 14:00 |
09/03/2012 22:30 |
1 |
09/03/2012 15:00 |
09/03/2012 23:30 |
3 |
09/03/2012 16:00 |
10/03/2012 00:30 |
4 |
11/03/2012 23:00 |
12/03/2012 06:00 |
3 |
12/03/2012 00:00 |
12/03/2012 07:00 |
2 |
12/03/2012 01:18 |
12/03/2012 01:55 |
2 |
14/03/2012 07:34 |
14/03/2012 08:11 |
2 |
16/03/2012 13:50 |
16/03/2012 14:26 |
2 |
18/03/2012 20:06 |
18/03/2012 20:42 |
2 |
21/03/2012 02:23 |
21/03/2012 02:58 |
2 |
23/03/2012 08:40 |
23/03/2012 09:14 |
2 |
25/03/2012 14:57 |
25/03/2012 15:30 |
2 |
27/03/2012 21:12 |
27/03/2012 21:45 |
2 |
30/03/2012 03:29 |
30/03/2012 04:00 |
2 |
01/04/2012 09:45 |
01/04/2012 10:16 |
2 |
03/04/2012 16:03 |
03/04/2012 16:32 |
2 |
05/04/2012 22:21 |
05/04/2012 22:48 |
2 |
08/04/2012 04:38 |
08/04/2012 05:04 |
2 |
10/04/2012 10:55 |
10/04/2012 11:18 |
Orbit and attitude manoeuvres, January/April 2012
In January to April 2012, there will be a series of manoeuvres to adjust the orbits of the spacecraft
and also to keep their attitudes within operational limits with respect to the Sun.
The manoeuvre times and the surrounding no-data-taking periods are shown in the table below. In general, we stop data-taking from
1 hour before each manoeuvre until 7 hours after each manoeuvre. But this may be reduced to retain existing WBD operations if these
are not overlapping or very close to the manoeuvre burns.
However, the instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre burns.
Notes
1. These manoeuvres are close to, or within, existing payload-off periods for eclipses. So we have extended these
periods, where needed, to cover the manoeuvre safety periods.
2. There are two close manoeuvres on 22 Jan, so they are combined into a single no-data-taking period.
3. The attitude manoeuvres on 17 February are 14 to 17 hours before
the start of the eclipse payload-off periods, so we have a separate payload-off
period for these manoeuvres.
4. The orbit manoeuvres on 23 March and 5 April will occur sometime within a 40 minute
window
S/c |
Payload to no data-taking |
Manoeuvre start |
Manoeuvre end |
Data-taking restarts |
See note |
3 |
22/01/2012 04:30 |
22/01/2012 06:14 |
22/01/2012 06:16 |
|
1,2 |
3 |
|
22/01/2012 12:55 |
22/01/2012 12:56 |
22/01/2012 17:00 |
1,2 |
3 |
26/01/2012 14:43 |
26/01/2012 15:43 |
26/01/2012 15:44 |
27/01/2012 01:30 |
1 |
3 |
02/02/2012 09:30 |
02/02/2012 10:30 |
02/02/2012 10:31 |
02/02/2012 22:00 |
1 |
3 |
17/02/2012 13:00 |
17/02/2012 14:00 |
17/02/2012 14:01 |
17/02/2012 18:30 |
3 |
4 |
17/02/2012 13:00 |
17/02/2012 15:00 |
17/02/2012 15:01 |
17/02/2012 18:30 |
3 |
1 |
17/02/2012 13:00 |
17/02/2012 16:00 |
17/02/2012 16:01 |
17/02/2012 18:30 |
3 |
2 |
17/02/2012 13:00 |
17/02/2012 17:00 |
17/02/2012 17:01 |
17/02/2012 18:30 |
3 |
3 |
20/02/2012 14:30 |
20/02/2012 19:57 |
20/02/2012 19:58 |
20/02/2012 22:30 |
1 |
3 |
22/02/2012 20:46 |
22/02/2012 21:46 |
22/02/2012 21:47 |
23/02/2012 06:00 |
1 |
1 |
24/02/2012 21:00 |
24/02/2012 22:00 |
24/02/2012 22:01 |
25/02/2012 11:00 |
1 |
2 |
24/02/2012 21:00 |
24/02/2012 22:00 |
24/02/2012 22:01 |
25/02/2012 09:00 |
1 |
4 |
24/02/2012 21:00 |
24/02/2012 22:00 |
24/02/2012 22:01 |
25/02/2012 10:00 |
1 |
3 |
25/02/2012 04:00 |
25/02/2012 08:38 |
25/02/2012 08:39 |
25/02/2012 12:00 |
1 |
3 |
29/02/2012 12:50 |
29/02/2012 13:50 |
29/02/2012 13:51 |
01/03/2012 00:30 |
1 |
3 |
07/03/2012 10:00 |
07/03/2012 11:00 |
07/03/2012 11:01 |
07/03/2012 20:30 |
1 |
4 |
23/03/2012 07:22 |
23/03/2012 08:22 |
23/03/2012 09:02 |
23/03/2012 16:02 |
4 |
4 |
05/04/2012 21:02 |
05/04/2012 22:02 |
05/04/2012 22:42 |
06/04/2012 05:42 |
4 |
Lunar eclipses, May and June 2012
The Cluster 1, 3 and 4 spacecraft will experience lunar eclipses in May and June 2012.
There will not be enough power to operate the payloads in these periods, so they will
switched off as shown in the table below.
Spacecraft |
Payload off |
Payload on |
Notes |
1 |
21/05/2012 02:00 |
21/05/2012 10:00 |
|
3 |
21/05/2012 03:40 |
21/05/2012 04:21 |
|
4 |
21/05/2012 03:40 |
21/05/2012 04:21 |
|
1 |
19/06/2012 13:30 |
19/06/2012 21:30 |
|
Attitude and orbit manoeuvres, May/July 2012
In May 2012, there will be a series of manoeuvres to adjust the attitude
s of the spacecraft
to keep these within operational limits with respect to the Sun.
The manoeuvre times are shown below.
22 May, 09:35 (sc 1)
22 May, 08:50 (sc 2)
22 May, 08:05 (sc 3)
22 May, 07:25 (sc 4)
As those instruments sensitive to manoeuvres must be put in safe modes around the manoeuvres,
there will be no data-taking on all four spacecraft around these manoeuvres
from 07:25 to 16:36 on 22 May.
These will be followed trim/orbit drift start manoeuvres as follows:
1 June, 11:06 (sc 1)
1 June, 11:06 (sc 2)
1 June, 11:06 (sc 3)
1 June, 11:06 (sc 4)
As those instruments sensitive to manoeuvres must be put in safe modes around the manoeuvres,
there will be no data-taking on all four spacecraft around these manoeuvres
from 10:06 to 12:07 on 1 June. This period is short in order to preserve existing WBD operations around
the perigee of orbit 1853.
These in turn will be followed by orbit drift stop manoeuvres as follows:
28 June, 14:17 (sc 1) - no-data-taking from 13:17 to 17:30
28 June, 13:49 (sc 3) - no-data-taking from 12:49 to 17:30
05 July, 09:33 (sc 1) - no-data-taking from 08:33 to 16:34
The no-data-taking periods on 28 June will end earlier than normal in order to preserve existing WBD operations.
The instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre burns.
Long eclipses, Summer 2012
The Cluster spacecraft will experience a series of umbral eclipses
between 16 July and 10 August 2012. There will not be enough power to
operate the payloads in these periods, so they will
switched off as shown in the table below.
Note that, for these eclipses, there will be a single long payload-off period on each spacecraft.
The Bryant plots show the payload-off period that is common to all four spacecraft, namely
20/07/2012 23:38 to 08/08/2012 16:30.
Spacecraft |
Payload off |
Payload on |
1 |
18/07/2012 17:57 |
08/08/2012 16:30 |
2 |
16/07/2012 02:29 |
08/08/2012 16:30 |
3 |
20/07/2012 23:38 |
10/08/2012 14:30 |
4 |
20/07/2012 23:36 |
10/08/2012 14:30 |
Attitude manoeuvres, August and September 2012
There will be manoeuvres in August and September, times shown below
with adjustments (where necessary) to preserve existing WBD operations.
28 August, 15:39 (sc3) - no-data-taking from 14:41 to 19:20
4 September, 12:21 (part1) (sc1) - no-data-taking for part 1 and part 2 combined
4 September, 13:14 (part2) (sc1) - - from 11:21 to 20:15
4 September, 11:03 (sc2) - no-data-taking from 10:03 to 18:04
4 September, 11:24 (sc3) - no-data-taking from 10:24 to 18:25
4 September, 10:27 (sc4) - no-data-taking from 09:27 to 12:00
13 September, 12:25 (sc1) - no-data-taking from 11:25 to 19:26
13 September, 11:34 (sc2) - no-data-taking from 10:34 to 14:35
13 September, 13:09 (sc3) - no-data-taking from 12:09 to 20:10
13 September, 11:38 (sc4) - no-data-taking from 10:38 to 12:39
As those instruments sensitive to manoeuvres must be put in safe modes around the manoeuvres, and the instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre burns.
Lunar eclipses, September and October 2012
The Cluster 1 and 2 spacecraft will experience lunar eclipses in October and September 2012 respectively.
There will not be enough power to operate the payloads in these periods, so they will
switched off as shown in the table below.
Spacecraft |
Payload off |
Payload on |
Notes |
2 |
15/09/2012 19:35 |
15/09/2012 20:14 |
ESOC request SHORT OFF from 19:25 to 20:23 |
1 |
15/10/2012 06:47 |
15/10/2012 07:11 |
ESOC request SHORT OFF from 06:37 to 07:21 |
Attitude manoeuvres, November 2012
There will be manoeuvres in November, times shown below
will be adjusted (where necessary) to preserve existing WBD operations.
4 November, 14:41 (sc1) - no-data-taking from 13:41 to 21:42
4 November, 07:34 (sc2) - no-data-taking from 06:34 to 14:35
4 November, 20:58 (sc3) - no-data-taking from 19:58 to 03:59
15 November, 22:02 (sc1) - no-data-taking from 21:02 to 05:03
15 November, 14:56 (sc2) - no-data-taking from 13:56 to 21:57
16 November, 04:27 (sc3) - no-data-taking from 03:27 to 11:28
22 November, 16:31 (sc1) - no-data-taking from 15:31 to 23:32
22 November, 10:43 (sc2) - no-data-taking from 09:43 to 17:44
22 November, 22:01 (sc3) - no-data-taking from 21:01 to 05:02
As those instruments sensitive to manoeuvres must be put in safe modes around the manoeuvres, and the instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre burns.
Attitude manoeuvres, December 2012
There will be manoeuvres in December, times shown below
will be adjusted (where necessary) to preserve existing WBD operations.
18 December, 10:30 (sc3) - no-data-taking from 09:30 to 17:31
As those instruments sensitive to manoeuvres must be put in safe modes around the manoeuvres, and the instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre burns.
Manoeuvres, Early 2013
There will be manoeuvres in January, February, March, times shown below
will be adjusted (where necessary) to preserve existing WBD operations.
2 January, 06:10 (sc4) - no-data-taking from 05:10 to 07:48 (WBD starts at 07:55)
2 January, 06:31 (sc1) - no-data-taking from 05:31 to 10:28 (WBD starts at 10:35)
2 January, 06:50 (sc2) - no-data-taking from 05:50 to 13:51
6 January, 20:01 (sc3) - no-data-taking from 19:01 to 03:02 on 7 January
9 January, 02:00 (sc3) - no-data-taking from 01:00 to 04:18 (WBD starts at 04:25)
9 January, 02:16 (sc1) - no-data-taking from 01:16 to 03:43 (WBD starts at 03:50)
11 January, 06:56 (sc2) - no-data-taking from 05:56 to 13:57 (Eclipse off extended 05:56 to 13:57)
11 January, 08:26 (sc4) - no-data-taking from 07:26 to 15:27
13 January, 12:49 (sc3) - no-data-taking from 11:49 to 19:50 (Eclipse off extended 11:49 to 19:50)
20 January, 08:01 (sc2) - no-data-taking from 07:01 to 15:30 (Eclipse off from 07:00 to 15:30)
20 January, 08:09 (sc3) - no-data-taking from 07:09 to 15:10 (Eclipse off extended 07:09 to 15:10)
22 January, 13:51 (sc1) - no-data-taking from 12:51 to 22:00 (Eclipse off extended 12:51 to 22:00)
16 February, 10:58 (sc2) - no-data-taking from 09:58 to 17:59 (Eclipse off extended 09:58 to 17:59)
**** UPDATED 29 Jan 2013, from ESOC manoeuvre plan v003 ****
13 March, 09:53 (sc2) - no-data-taking from 09:23 to 16:58
13 March, 09:59 (sc1) - no-data-taking from 09:29 to 11:00 (WEC OFF 09:52 to 10:20)
13 March, 09:59 (sc3) - no-data-taking from 09:29 to 11:00
13 March, 10:02 (sc4) - no-data-taking from 09:32 to 11:03
22 March, 11:10 (sc2) - no-data-taking from 10:10 to 18:11
As those instruments sensitive to manoeuvres must be put in safe modes around the manoeuvres, and the instruments sensitive to manoeuvres will
remain in their safe modes until at least 8 hours after the manoeuvre burns.
Eclipses, early 2013
The Cluster spacecraft will experience a series of eclipses
in January, February and March 2013. There will not be enough power to operate
the payloads in these periods, so they will
switched off as shown in the table below.
Due to the latest power constraints the SSRs will be emptied before
each eclipse. There is some risk of losing the last few hours of science
data before the eclipse.
To allow the Guest Investigator observations, large Burst Mode operations
before the eclipses were agreed in advance with ESOC. These data will have
priority over normal data. Some WBD passes, during the last 12 hours before
eclipse, could need to be cancelled, in case they conflict with the extra
passes needed to empty the SSR before the eclipse.
The following eclipses have been extended to include manoeuvres:
11 Jan C2
13 Jan C3
20 Jan C2, C3
22 Jan C1
16 Feb C2
Spacecraft |
Type |
Payload off |
Payload on |
C2 | SHORT OFF | 06 Jan 19:20 |
06 Jan 19:53 |
C2 |
LONG OFF |
09 Jan 0:00 |
09 Jan 3:00 |
C2 |
LONG OFF |
11 Jan 5:56 |
11 Jan 13:57 |
C1 |
LONG OFF |
11 Jan 6:00 |
11 Jan 13:00 |
C2 |
LONG OFF |
13 Jan 11:00 |
13 Jan 17:00 |
C4 |
LONG OFF |
13 Jan 11:00 |
13 Jan 18:00 |
C3 |
LONG OFF |
13 Jan 11:49 |
13 Jan 19:50 |
C1 |
LONG OFF |
13 Jan 13:00 |
13 Jan 20:00 |
C2 |
LONG OFF |
15 Jan 15:00 |
15 Jan 23:00 |
C3 |
LONG OFF |
15 Jan 15:00 |
16 Jan 0:00 |
C4 |
LONG OFF |
15 Jan 16:00 |
16 Jan 1:00 |
C1 |
LONG OFF |
15 Jan 16:30 |
16 Jan 2:00 |
C2 |
LONG OFF |
18 Jan 0:00 |
18 Jan 5:00 |
C3 |
LONG OFF |
18 Jan 0:00 |
18 Jan 11:00 |
C1 |
LONG OFF |
18 Jan 1:00 |
18 Jan 8:30 |
C4 |
LONG OFF |
18 Jan 1:00 |
18 Jan 11:00 |
C4 |
LONG OFF |
20 Jan 5:00 |
20 Jan 13:30 |
C1 |
LONG OFF |
20 Jan 6:00 |
20 Jan 14:30 |
C2 |
LONG OFF |
20 Jan 7:00 |
20 Jan 15:30 |
C3 |
LONG OFF |
20 Jan 7:09 |
20 Jan 15:10 |
C3 |
LONG OFF |
22 Jan 11:30 |
22 Jan 20:00 |
C2 |
LONG OFF |
22 Jan 13:00 |
22 Jan 21:00 |
C1 |
LONG OFF |
22 Jan 12:51 |
22 Jan 22:00 |
C4 |
LONG OFF |
22 Jan 13:00 |
22 Jan 23:00 |
C2 |
LONG OFF |
24 Jan 16:30 |
25 Jan 0:30 |
C1 |
LONG OFF |
24 Jan 16:30 |
25 Jan 1:15 |
C3 |
LONG OFF |
24 Jan 16:30 |
25 Jan 7:00 |
C4 |
LONG OFF |
24 Jan 17:30 |
25 Jan 7:00 |
C2 |
LONG OFF |
27 Jan 0:30 |
27 Jan 9:00 |
C1 |
LONG OFF |
27 Jan 0:30 |
27 Jan 10:00 |
C3 |
LONG OFF |
27 Jan 2:00 |
27 Jan 12:00 |
C4 |
LONG OFF |
27 Jan 2:00 |
27 Jan 12:00 |
C2 |
LONG OFF |
29 Jan 6:00 |
29 Jan 13:00 |
C3 |
LONG OFF |
29 Jan 7:00 |
29 Jan 15:00 |
C4 |
LONG OFF |
29 Jan 9:00 |
29 Jan 17:30 |
C1 |
LONG OFF |
29 Jan 9:30 |
29 Jan 18:30 |
C4 |
LONG OFF |
31 Jan 12:00 |
31 Jan 21:30 |
C3 |
LONG OFF |
31 Jan 12:00 |
31 Jan 22:00 |
C2 |
LONG OFF |
31 Jan 14:00 |
31 Jan 19:30 |
C1 |
LONG OFF |
31 Jan 14:00 |
31 Jan 23:00 |
C2 |
LONG OFF |
02 Feb 14:30 |
03 Feb 1:30 |
C1 |
LONG OFF |
02 Feb 15:00 |
03 Feb 3:30 |
C4 |
LONG OFF |
02 Feb 15:30 |
03 Feb 5:00 |
C3 |
LONG OFF |
02 Feb 16:00 |
03 Feb 6:30 |
C2 |
LONG OFF |
05 Feb 0:30 |
05 Feb 9:00 |
C1 |
LONG OFF |
05 Feb 1:30 |
05 Feb 11:00 |
C3 |
LONG OFF |
05 Feb 2:30 |
05 Feb 12:00 |
C4 |
LONG OFF |
05 Feb 3:30 |
05 Feb 13:00 |
C2 |
LONG OFF |
07 Feb 6:35 |
07 Feb 14:00 |
C1 |
LONG OFF |
07 Feb 9:00 |
07 Feb 16:00 |
C3 |
LONG OFF |
07 Feb 10:00 |
07 Feb 18:00 |
C4 |
LONG OFF |
07 Feb 10:00 |
07 Feb 18:00 |
C4 |
LONG OFF |
09 Feb 12:50 |
09 Feb 22:00 |
C2 |
LONG OFF |
09 Feb 13:00 |
09 Feb 21:00 |
C1 |
LONG OFF |
09 Feb 13:30 |
09 Feb 23:00 |
C3 |
LONG OFF |
09 Feb 15:00 |
10 Feb 4:30 |
C2 |
LONG OFF |
11 Feb 15:00 |
12 Feb 5:00 |
C3 |
LONG OFF |
11 Feb 16:30 |
12 Feb 7:00 |
C1 |
LONG OFF |
11 Feb 22:00 |
12 Feb 8:00 |
C4 |
LONG OFF |
11 Feb 22:00 |
12 Feb 9:00 |
C2 |
LONG OFF |
14 Feb 3:30 |
14 Feb 10:00 |
C1 |
LONG OFF |
14 Feb 3:30 |
14 Feb 12:00 |
C3 |
LONG OFF |
14 Feb 4:30 |
14 Feb 13:00 |
C4 |
LONG OFF |
14 Feb 5:30 |
14 Feb 14:00 |
C4 |
LONG OFF |
16 Feb 10:00 |
16 Feb 17:00 |
C3 |
LONG OFF |
16 Feb 10:00 |
16 Feb 19:00 |
C2 |
LONG OFF |
16 Feb 9:58 |
16 Feb 17:59 |
C1 |
LONG OFF |
16 Feb 11:00 |
16 Feb 19:00 |
C2 |
LONG OFF |
18 Feb 13:00 |
18 Feb 21:30 |
C1 |
LONG OFF |
18 Feb 13:30 |
18 Feb 22:30 |
C4 |
LONG OFF |
18 Feb 14:00 |
18 Feb 23:30 |
C3 |
LONG OFF |
18 Feb 14:30 |
19 Feb 0:30 |
C4 |
LONG OFF |
20 Feb 22:00 |
21 Feb 4:00 |
C2 |
LONG OFF |
20 Feb 22:00 |
21 Feb 6:00 |
C1 |
LONG OFF |
20 Feb 23:00 |
21 Feb 9:00 |
C3 |
LONG OFF |
20 Feb 23:00 |
21 Feb 10:00 |
C2 |
LONG OFF |
23 Feb 4:30 |
23 Feb 11:00 |
C1 |
LONG OFF |
23 Feb 5:00 |
23 Feb 13:00 |
C3 |
LONG OFF |
23 Feb 6:00 |
23 Feb 14:00 |
C4 |
LONG OFF |
23 Feb 6:00 |
23 Feb 15:00 |
C2 |
LONG OFF |
25 Feb 10:30 |
25 Feb 16:30 |
C1 |
LONG OFF |
25 Feb 11:00 |
25 Feb 19:00 |
C4 |
LONG OFF |
25 Feb 11:30 |
25 Feb 18:00 |
C3 |
LONG OFF |
25 Feb 12:00 |
25 Feb 20:00 |
C2 |
LONG OFF |
27 Feb 12:30 |
27 Feb 22:30 |
C1 |
LONG OFF |
27 Feb 13:30 |
28 Feb 4:30 |
C4 |
LONG OFF |
27 Feb 14:00 |
27 Feb 23:00 |
C3 |
LONG OFF |
27 Feb 14:00 |
28 Feb 4:30 |
C2 |
LONG OFF |
01 Mar 22:30 |
02 Mar 6:30 |
C1 |
LONG OFF |
01 Mar 22:30 |
02 Mar 8:30 |
C3 |
LONG OFF |
02 Mar 0:00 |
02 Mar 10:00 |
C4 |
LONG OFF |
02 Mar 0:00 |
02 Mar 11:00 |
C3 |
LONG OFF |
04 Mar 5:00 |
04 Mar 15:00 |
C4 |
LONG OFF |
04 Mar 6:00 |
04 Mar 16:00 |
C2 |
LONG OFF |
04 Mar 7:00 |
04 Mar 11:30 |
C1 |
LONG OFF |
04 Mar 7:00 |
04 Mar 17:00 |
C2 |
LONG OFF |
06 Mar 12:30 |
06 Mar 18:30 |
C2 |
LONG OFF |
08 Mar 15:00 |
08 Mar 23:30 |
C2 |
SHORT OFF |
11 Mar 3:10 |
11 Mar 3:40 |
Last updated by Mike
Hapgood ( mike.hapgood@stfc.ac.uk),
31 March 2013
|