STEREO Weekly Meeting Minutes for 2007-04-17 (Week 16)


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

* Unattended track operations start April 30th.  Concept of Operations document
  has been sent out, and is also available on Stereo Data Server under
  teams/moc.

* Operations schedule on SDS under teams/moc has been updated to include HGA
  calibrations, etc.

* MOPs considering changing description of opening instrument RT commanding,
  and asks if any instrument team has software which depends on the exact
  wording of this item?


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

* All subsystems on both spacecraft are nominal.  The Ahead spececraft is
  currently operating on IMU #2.


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

Week 15

* Ahead suffered a 5 minute loss of realtime data around 15:04 UT on station 26
  because of an IONET switch reset.

* Daily average downlink rates were 6.8 gigabits for Ahead and 9.3 gigabits for
  Behind.

* Successful momentum dump on Ahead on day 102.  Imparted 0.0855 m/s delta-V.

* Frequent realtime data drop-outs on Behind on day 101 on station 45.  Problem
  traced to router at JPL and corrected.

* Ephemeris update on Behind on day 100.

* Quite a few reboots of ground system equipment during the week.  10 terabytes
  of storage was added to the MOC servers on Monday.  The SDS was rebooted
  twice to add 300 GB RAID.

* IMU autonomy rule triggered on Ahead spacecraft on day 101.  IMU #1 built-in
  self test failed.  Path length correction on X axis gyro kept failing.  The
  spacecraft automatically switched over to IMU #2 as it was supposed to.  The
  situation is being looked into.

Week 16

* Ephemeris and time updates will be applied to Ahead spacecraft on day 108.

* SECCHI GT off-points on both spacecraft on Thursday.

* SECCHI stepped roll occured on Behind spacecraft this morning.  All
  indications so far are that all went nominally.

* Time update on Wednesday.

Week 17

* Ephemeris update on Behind at day 119/120 roll-over.

Week 18

* Start unattended track operations, Monday, day 120.

* Start of 14 day SECCHI campaign on Friday, day 124.  This involves extra 3
  hour tracks about 12 hours after the regular track, bringing down SECCHI
  buffers and spacecraft housekeeping.

Week 19

* Continue SECCHI campaign

Week 20

* May 17th is last day of SECCHI campaign.

Other

* DSN schedules available up to week 21.  DAWN launch at end of June may affect
  STEREO schedules.


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

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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	14:20 UT
F Apr 20 (110)  
S Apr 21 (111)  
S Apr 22 (112)  

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

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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

-------------------------------------------------------------------------------
Scheduled activities for Week 19:

M May 07 (127)  Continuing SECCHI campaign
T May 08 (128)  
W May 09 (129)  
T May 10 (130)  
F May 11 (131)  
S May 12 (132)  
S May 13 (133)  

Notes:
* EIT shutterless campaign May 9, 16:50-00:00 UT; run time 19:00-21:40 UT 
* Ulysses quadrature/MERLIN observations, May 7-13

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Scheduled activities for Week 20:

M May 14 (134)  
T May 15 (135)  
W May 16 (136)  
T May 17 (137)  
F May 18 (138)  
S May 19 (139)  
S May 20 (140)  

Notes:
* EIT shutterless campaign May 15, 14:10-23:45 UT; run time 19:00-21:40 UT

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