STEREO Weekly Meeting Minutes for 2007-09-18 (Week 38)


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

* None.


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

* All subsystems on both spacecraft are nominal, except that the Ahead
  spececraft is currently operating on IMU #2.


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

Week 37

* Average daily downlink was 7.2 gigabits for Ahead, and 7.6 gigabits for
  Behind.

* Selene launched early Friday.

* There was a receiver problem on station 55 during the Behind pass on day 253
  (Sep 10).  Some SECCHI data were lost.  Although station 55 also had problems
  in recent weeks, that previous problem was corrected, and is unrelated to the
  problem seen this week.  It was remarked that station 55 is one of the newest
  DSN stations.  Station 65 is currently planned to go down in November.
  Station 63, which is a 70 meter disk, will be used next week along with
  station 55.

* A new PLASTIC table was uploaded to the Behind spacecraft on day 255 (Sep
  11).  However, the PLASTIC team plans to redo this table load.

Week 38

* Nothing unusual planned.

Week 39

* PLASTIC table uploads on Ahead on Sept. 24th and 28th.  The upload requires
  at least two tracks, about 9 hours.

* Momentum dumps will be performed on both spacecraft on day 268 (Sep 25), at
  13:00 UT for Ahead, and 18:00 UT for Behind.

* The first DAWN launch opportunity is on day 269 (Sep 26).  A slip would most
  likely affect the Ahead schedule, but may also affect Behind.  Contingency
  schedules have not been delivered yet.

* SWAVES wold like to do uploads this week on both spacecraft.  Would need
  about 2 or so hours.

Week 40

* HGA calibrations on both spacecraft on Wednesday, day 276 (Oct 3), at 14:00
  for Ahead and 16:00 UT for Behind.  The tracks for these events will by 7
  hours long.  The motion will only be +/- 1 degree this time.

Other

* Schedules for later weeks are not available yet, and depend on the DAWN
  launch date.

* There was a problem with the SECCHI space weather images backing up within
  the SECCHI processor, by as much as 3 hours.  The SECCHI team changed their
  space weather packet rate to alleviate this problem.  However, this caused
  some realtime spaceweather packets to be dropped, both from SECCHI and from
  other instruments.  The SECCHI team has reversed this change, and is going
  back to an earlier version of their spaceweather product which doesn't take
  as much telemetry.

* The STEREO Ahead spacecraft will pass through the Leonids debris field on Oct
  29th, about one month before Earth.  Calculations show that STEREO Ahead is
  expected to pass through the center of the debris field, while STEREO Behind
  should be significantly out of the trail.  No significant problems are
  expected on the spacecraft, but information is being collected so that the
  instrument teams can assess how they might be affected by the Leonids.


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

-------------------------------------------------------------------------------
Scheduled activities for Week 38:

M Sep 17 (260)  
T Sep 18 (261)  
W Sep 19 (262)  
T Sep 20 (263)  
F Sep 21 (264)  
S Sep 22 (265)  
S Sep 23 (266)  

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Scheduled activities for Week 39:

M Sep 24 (267)  Ahead: PLASTIC table update
T Sep 25 (268)  Both: Momentum dump, Ahead 13:00, Behind 18:00
W Sep 26 (269)  DAWN launch, 11:25 UT
T Sep 27 (270)  
F Sep 28 (271)  Ahead: PLASTIC table update continuation
S Sep 29 (272)  
S Sep 30 (273)  

-------------------------------------------------------------------------------
Scheduled activities for Week 40:

M Oct 01 (274)  
T Oct 02 (275)  
W Oct 03 (276)  Both: HGA calibrations, Ahead 14:00, Behind 16:00.
T Oct 04 (277)  
F Oct 05 (278)  
S Oct 06 (279)  
S Oct 07 (280)  

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Upcoming events:

2007:

* Oct 30 - Nov 5	JOP 197, Coronal hole  plumes
* Nov 01 - Nov 16	JOP 196, Detection of waves in the solar atmosphere
* Nov 02 - Nov 16	JOPs 190,191,192,193, SUMER campaign
* Nov 06		EUNIS sounding rocket launch
* Dec 2007-May 2008	Ulysses quadrature