STEREO Weekly Meeting Minutes for 2008-09-16 (Week 38) ANNOUNCEMENTS ------------- * The Behind spacecraft is now operating at 480 kbps downlink rate, as of Monday, Sep 15. Ahead will drop to 480 kbps on Oct 13. 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 * SECCHI-Ahead had a watchdog reset on Thursday, day 255 (Sep 11) at 20:56 UT. The SECCHI team reconfigured the instrument the next day at 11:45 UT, and the observation schedule restarted at 14:00 UT. The previous reset on SECCHI-Ahead was back in January 2008. * A power glitch on station 26, during the day 253 (Sep 9) pass on Behind, caused the antenna brakes to be set. This resulted in minor data loss on all instruments. * The average daily downlink was 7.0 gigabits on each of Ahead and Behind. Week 38 * Yesterday (Sep 15), the IMPACT team uploaded a LET software patch to Ahead. * The 16th momentum dump on Ahead occured this morning. The burn duration was 190 seconds, and 0.086 m/s delta-V was imparted. * The SECCHI team uploaded flight software patch 5.09 to Behind on Monday, Sep 15. * Behind switched to 480 kbps on Sep 15. Ahead will switch on Oct 13. There was some discussion about when the table changes within the DSN should be performed to support the telemetry rate change on Oct 13. Week 39 * A momentum dump on Behind is planned for day 267 (Sep 23) at 17:00 UT. Week 40 * The SECCHI stepped calibration roll on Ahead is scheduled for day 274 (Sep 30) at 06:55 UT. Week 41 * No unusual activities planned. Other * Ingestion of the SECCHI FITS files into the SSC was disrupted last week because of computer problems at NRL. A work-around has been put in place, and the data is flowing again. COORDINATED OBSERVATIONS ------------------------ ------------------------------------------------------------------------------- Scheduled activities for Week 37: M Sep 08 (252) T Sep 09 (253) W Sep 10 (254) T Sep 11 (255) ICAL-001, 14:00 UT Ahead: SECCHI watchdog reset at 20:56 F Sep 12 (256) Ahead: SECCHI recovered at 11:45, schedule restarted at 14:00 S Sep 13 (257) S Sep 14 (258) Notes: * Sep 6-19, JOP 214: Quiescent prominence structure and dynamics with Hinode and La Palma, 8-12 UT ------------------------------------------------------------------------------- Scheduled activities for Week 38: M Sep 15 (259) Behind: Switch downlink rate to 480 kbps T Sep 16 (260) Ahead: Momentum dump, 13:00 UT W Sep 17 (261) T Sep 18 (262) F Sep 19 (263) S Sep 20 (264) S Sep 21 (265) Notes: * Sep 6-19, JOP 214: Quiescent prominence structure and dynamics with Hinode and La Palma, 8-12 UT * Sep 20-Oct4 SUMER Mini-campaign ------------------------------------------------------------------------------- Scheduled activities for Week 39: M Sep 22 (266) T Sep 23 (267) Behind: Momentum dump, 17:00 UT W Sep 24 (268) T Sep 25 (269) F Sep 26 (270) S Sep 27 (271) S Sep 28 (272) Notes: * Sep 20-Oct4 SUMER Mini-campaign ------------------------------------------------------------------------------- Scheduled activities for Week 40: M Sep 29 (273) T Sep 30 (274) Ahead: SECCHI stepped calibration roll W Oct 01 (275) T Oct 02 (276) F Oct 03 (277) S Oct 04 (278) S Oct 05 (279) Notes: * Sep 20-Oct4 SUMER Mini-campaign ------------------------------------------------------------------------------- Scheduled activities for Week 41: M Oct 06 (280) Messenger - Mercury fly-by T Oct 07 (281) W Oct 08 (282) T Oct 09 (283) F Oct 10 (284) S Oct 11 (285) S Oct 12 (286) ------------------------------------------------------------------------------- Upcoming events: 2008: SECCHI Stepped calibration rolls Ahead: Dec 16 Behind: Dec 2 ICAL-001: Sep 1-5, Oct 6-10, Nov 3-7, Dec 1-5 * Oct 13 Ahead: Switch downlink rate to 480 kbps * Oct 16,28 JOP 80, EIT shutterless * Nov 1-Dec 15 SUMER campaign (may be cancelled) 2009: ICAL-001: Jan 5-9 SECCHI Stepped calibration rolls Ahead: Mar 10, Jun 9, Sep 2, Nov 24 Behind: Mar 10, Jun 16, Sep 22, Dec 22 * Jan 15,22 JOP 80, EIT shutterless * May 18 Ahead: Switch downlink rate to 360 kbps * Jun 8 Behind: Switch downlink rate to 360 kbps * Aug 4 Both: Increase track duration from 4 to 5 hours * Aug 10 Ahead: Switch downlink rate to 160 kbps * Aug 31 Behind: Switch downlink rate to 160 kbps * Sep 10 Ahead at L4 Lagrange point * Sep 29 Messenger - Mercury fly-by * Oct 25 Behind at L5 Lagrange point