STEREO Weekly Meeting Minutes for 2007-08-07 (Week 32)


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

* Starting approximately a couple of weeks from now, the start of the recorder
  playback will be 3 minutes later into the pass to give more time for the
  uplink sweep, now that the spacecraft are further away.  This will mean that
  the total recorder playback will be 3 minutes shorter.  The date of this
  change will be announced prior to its implementation.


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 31

* Guide telescope rate usage was enabled on Ahead on day 213 (Aug 1).

* The average daily SSR downlink volume was 7.4 gigabits on Ahead and 8.0
  gigabits on Behind.

* A SECCHI mode change on Behind caused Autonomy Rule 126 to fire on day 214
  (Aug 2) during the track, disabling the use of GT rate usage.  It was
  reenabled during the same track.  This was caused by SECCHI doing a software
  reset while trying to recover from a bug involving their light travel time
  correction.  In future, the SECCHI team will warn the MOC before any planned
  operations that will cause the autonomy rule to fire.  The rule will also
  fire whenever the SECCHI instrument reboots itself autonomously.

* The SECCHI team encountered a problem with their light travel time correction
  on the Behind spacecraft that caused observations to be scheduled at
  incorrect times several days in the future.  A temporary fix was implemented
  to disable the light travel time correction, and a software patch has been
  prepared to fix the problem.  The SECCHI team commends the MOC team for
  coming in on Saturday to assist in commanding needed to fix the problem.

Week 32

* SECCHI attempted to load their software patch to the Behind spacecraft this
  morning (Aug 7), but encountered problems.  The source of the problem is
  still under investigation, but is believed to occur within the MOC ground
  software.  The command load was larger than the usual SECCHI load.  SECCHI
  will attempt again to send up the patch during the pass tonight, which will
  be attended both at APL and at NRL.

Week 33

* There will be a momentum dump on the Ahead spacecraft on day 228 (Aug 16), at
  22:45 UT.  This will be the seventh momentum dump on Ahead.  PLASTIC saw a
  large spike in their data rate during the last momentum dump on Behind, even
  when the entrance system was turned off.  This was never seen before.  That
  momentum dump was no different from previous dumps, and the plan for the
  upcoming dump is also quite normal.

* The COR2 stray light off-point maneuver will occur on Behind on day 226 (Aug
  14) at 14:50 UT.

* Ulysses will pass through the ecliptic plane on August 19th.

Week 34

* No special events are currently planned.


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

-------------------------------------------------------------------------------
Scheduled activities for Week 32:

M Aug 06 (218)  
T Aug 07 (219)  
W Aug 08 (220)  JOP 194 begins
T Aug 09 (221)  
F Aug 10 (222)  
S Aug 11 (223)  
S Aug 12 (224)  

Notes:
* Aug 8-18		JOP 194, Filament/Cavity-CME-ICME IHY-CIP campaign,
			(CIPs 7,21,23,51)

-------------------------------------------------------------------------------
Scheduled activities for Week 33:

M Aug 13 (225)  JOP 194 continues
T Aug 14 (226)  Behind: COR2 off-point calibration maneuver, 14:50 UT
W Aug 15 (227)  
T Aug 16 (228)  Ahead: Momentum dump, 22:45 UT
F Aug 17 (229)  
S Aug 18 (230)  End of JOP 194
S Aug 19 (231)  Ulysses ecliptic plane passage

Notes:
* Aug 8-18		JOP 194, Filament/Cavity-CME-ICME IHY-CIP campaign,
			(CIPs 7,21,23,51)

-------------------------------------------------------------------------------
Scheduled activities for Week 34:

M Aug 20 (232)  
T Aug 21 (233)  
W Aug 22 (234)  
T Aug 23 (235)  
F Aug 24 (236)  
S Aug 25 (237)  
S Aug 26 (238)  

-------------------------------------------------------------------------------

Upcoming events:

2007:

* May 7 -Aug 10		Hinode eclipse season
* Aug 6-10		SOHO Intercalibration #1 (ICAL01)
* Oct 22 - Nov 2	SUMER campaign (JOPs 190,191,192,193)
* Dec 2007-May 2008	Ulysses quadrature