STEREO Weekly Meeting Minutes for 2007-03-29 (Week 13)


ANNOUNCEMENTS
-------------

* A PowerPoint presentation on the upcoming unattended track operations is
  available on the STEREO Data Server in the teams/moc directory.


INSTRUMENT AND SPACECRAFT STATUS
--------------------------------

* All subsystems on both spacecraft are nominal.


DISCUSSION AND OPERATIONS CONSTRAINTS
-------------------------------------

Week 12

* On day 84 for the Ahead spacecraft, station 26 had a transmission problem,
  delaying commanding for about 2 hours.  This led to a 1.5 minute gap in the
  SSR playback.

* Average telemetry recovery rate was 7.3 Gbits for Ahead, and 9.4 Gbits for
  Behind.

* Unusual levels of jitter were seen on the Ahead spacecraft on days 83 and 84.

Week 13

* SECCHI repartioning on both spacecraft was performed on Monday, Mar 26.

* Changes to the IMPACT temperarture limits autonomy rule were uploaded on
  Tuesday, Mar 27.

* IMPACT LET firmware load today on both spacecraft.

* A power failure at Goldstone during an unattended pass caused data loss on
  the Behind spacecraft.

* Ephemeris update on Behind at the day 89/90 rollover.

Week 14

* HGA calibration on both spacecraft on Tuesday, April 3.

* Momentum dump on Behind on April 5.  Will remain on HGA during the dump.
  This dump is a little early, and will put the wheels into a good
  configuration for the upcoming SECCHI roll.

Week 15

* Momentum dump on Ahead, April 12.

Week 16

* SECCHI stepped calibration roll on April 17.

* SECCHI GT off-points on both spacecraft, April 19.

Week 17

* Nothing unusual

Week 18

* Begin unattended tracks April 30

* Start of SECCHI campaign, Friday, May 4.

Other

* DSN schedules are available up through May 27.  SECCHI will start taking
  advantage of the extra tracks.

* The SECCHI team discussed the packet gaps they've been seeing in their
  special event buffer telemetry.  Many data gaps are seen in the beginning of
  the track, while no gaps are seen later in the track.  One possibility that
  was discussed was that this effect could be caused by data being written to
  the buffer while it's being read, overwriting older telemetry.

* The unattended track concept of operations was discussed.  A PowerPoint
  presentation is available on the SDS website, in the teams/moc directory.

	- The MOC expects to have an attended track roughly once a week for
          operations such as time updates.  These tracks will be clearly marked
          in the DSN and weekly schedules.  Instrument teams can use these
          tracks for their own realtime commanding.

	- The question of how the instrument teams can call the MOC was
          discussed.  The MOC will put the schedule of who's on duty on the
          SDS, and will look into the possibility of having a single contact
          number.

	- Instrument teams are encouraged to start using Instrument Event
          Schedule files to request operations such as realtime commanding.
          APL will put sample IES files on the STEREO Data Server.

COORDINATED OBSERVATIONS
------------------------

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Scheduled activities for Week 13:

M Mar 26 (085)  Both: Reformatting SECCHI partitions
T Mar 27 (086)  
W Mar 28 (087)  
T Mar 29 (088)  Both: IMPACT LET firmware upload
F Mar 30 (089)  
S Mar 31 (090)  
S Apr 01 (091)  

Notes:
* SUMER/Hinode campaign, Mar 13-Apr 30

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Scheduled activities for Week 14:

M Apr 02 (092)  
T Apr 03 (093)  Both: HGA calibration
W Apr 04 (094)  
T Apr 05 (095)  Behind: Momentum dump
F Apr 06 (096)  
S Apr 07 (097)  
S Apr 08 (098)  

Notes:
* SUMER/Hinode campaign, Mar 13-Apr 30

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Scheduled activities for Week 15:

M Apr 09 (099)  
T Apr 10 (100)  
W Apr 11 (101)  
T Apr 12 (102)  Ahead: Momentum dump
F Apr 13 (103)  
S Apr 14 (104)  
S Apr 15 (105)  

Notes:
* SUMER/Hinode campaign, Mar 13-Apr 30

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Scheduled activities for Week 16:

M Apr 16 (106)  
T Apr 17 (107)  Behind: SECCHI Stepped Roll	08:35 UT
W Apr 18 (108)  
T Apr 19 (109)  Behind: SECCHI GT Offpoint	10:05 UT
		Ahead:  SECCHI GT Offpoint	15:20 UT
F Apr 20 (110)  
S Apr 21 (111)  
S Apr 22 (112)  

Notes:
* SUMER/Hinode campaign, Mar 13-Apr 30

-------------------------------------------------------------------------------
Scheduled activities for Week 17:

M Apr 23 (113)  
T Apr 24 (114)  
W Apr 25 (115)  
T Apr 26 (116)  
F Apr 27 (117)  
S Apr 28 (118)  
S Apr 29 (119)  

Notes:
* SUMER/Hinode campaign, Mar 13-Apr 30

-------------------------------------------------------------------------------
Scheduled activities for Week 18:

M Apr 30 (120)  Begin unattended tracks
T May 01 (121)  
W May 02 (122)  
T May 03 (123)  
F May 04 (124)  Start of SECCHI campaign
S May 05 (125)  
S May 06 (126)  

Notes:
* SUMER/Hinode campaign, Mar 13-Apr 30

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