STEREO Weekly Meeting Minutes for 2008-01-29 (Week 5) ANNOUNCEMENTS ------------- * Star tracker use will be suspended between tracks on Behind Feb 11-15 to collect data on the performance of the spacecraft without the star tracker. Sun pointing will still be controlled by the guide telescope, and only the roll should be affected. The roll should be maintained better than it was during the problems with the star tracker in December. The same test will be performed on Ahead in the following week. The MOC will look into the possibility of providing roll data to the instrument teams based on the quaternions reported by the star tracker while it's disabled. 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 4 * SECCHI-Ahead had a watchdog reset at 01:07 on January 24. Recovery was completed at 13:52. This is the sixth SECCHI watchdog reset on Ahead. * A momentum dump was carried out on Behind on January 23 at 15:30 UT. * The average daily downlink was 6.7 gigabits on Ahead, and 7.8 gigabits on Behind. Week 5 * Two workstations in the MOC are going down Janary 29 to apply Unix patches. Week 6 * A momentum dump will be performed on Ahead at 13:45 UT. Week 7 * Behind will be at perihelion on day 47 (Feb 16). * Star tracker use on Behind will be disabled between tracks from Feb 11-15. See the announcement above. Week 8 * A SECCHI stepped calibration will be performed on Behind on February 19 starting at 09:45 UT. * Star tracker use on Ahead will be disabled between tracks. Week 9 * Nothing unusual Week 10 * Nothing unusual COORDINATED OBSERVATIONS ------------------------ ------------------------------------------------------------------------------- Scheduled activities for Week 05: M Jan 28 (028) T Jan 29 (029) W Jan 30 (030) T Jan 31 (031) F Feb 01 (032) S Feb 02 (033) S Feb 03 (034) ------------------------------------------------------------------------------- Scheduled activities for Week 06: M Feb 04 (035) T Feb 05 (036) W Feb 06 (037) Ahead: Momentum dump 13:45 UT T Feb 07 (038) F Feb 08 (039) S Feb 09 (040) S Feb 10 (041) ------------------------------------------------------------------------------- Scheduled activities for Week 07: M Feb 11 (042) T Feb 12 (043) W Feb 13 (044) T Feb 14 (045) F Feb 15 (046) S Feb 16 (047) S Feb 17 (048) Notes: * Star tracker use will be disabled on Behind, Feb 11-15 ------------------------------------------------------------------------------- Scheduled activities for Week 08: M Feb 18 (049) T Feb 19 (050) Behind: SECCHI stepped calibration roll, 09:45 UT W Feb 20 (051) T Feb 21 (052) F Feb 22 (053) S Feb 23 (054) S Feb 24 (055) Notes: * Star tracker use will be disabled on Ahead, Feb 18-22 ------------------------------------------------------------------------------- Scheduled activities for Week 09: M Feb 25 (056) T Feb 26 (057) W Feb 27 (058) T Feb 28 (059) F Feb 29 (060) S Mar 01 (061) S Mar 02 (062) ------------------------------------------------------------------------------- Scheduled activities for Week 10: M Mar 03 (063) T Mar 04 (064) W Mar 05 (065) T Mar 06 (066) F Mar 07 (067) S Mar 08 (068) S Mar 09 (069) ------------------------------------------------------------------------------- Upcoming events: 2008: SECCHI Stepped calibration rolls Ahead: Apr 1, Jun 24, Sep 23, Dec 16 Behind: May 20, Aug 26, Dec 2 * Dec 2007-May 2008 Ulysses quadrature http://stereo-ssc.nascom.nasa.gov/plans/UlyLocation2006-2014_v1.pdf * Mar 20 - Apr 16 Whole Heliosphere Interval http://ihy2007.org/WHI/targeted_plans.shtml Mar 20-26 JOP 201, Linking Corona to Solar Wind at Ulysses Mar 27-Apr 2 JOP 202, Origin of the Slow Solar Wind Apr 3-9 JOP 203, Coronal hole boundaries *or* JOP 206, Low-latitude coronal holes Apr 10-16 JOP 204, Energetics and dynamics of quiet Sun Targets of opportunity: JOPs 205, 206, 194 * Apr 21 - May 16 SUMER campaign * Oct 6 Messenger - Mercury fly-by