STEREO Weekly Meeting Minutes for 2010-02-09 (Week 06) ANNOUNCEMENTS ------------- * None. INSTRUMENT and SPACECRAFT STATUS -------------------------------- * All subsystems on both spacecraft are nominal. DISCUSSION AND OPERATIONS CONSTRAINTS ------------------------------------- Week 5 * Turbo lock was lost intermittently during the station 45 pass on Ahead on day 35 (Feb 4). This resulted in the loss of about 30 minutes of SSR data for all instruments. * SECCHI loaded software update 5.15 to Ahead on day 33 (Feb 2). * Ranging correlator lock was delayed during the station 45 pass on Behind on day 35 (Feb 4), due to equipment problems. This resulted in the loss of 31 minutes of ranging data. * Turbo lock was lost intermittently during the station 45 pass on Behind on day 35 (Feb 4). This resulted in the loss of several minutes of SSR data for all instruments. * The 21st momentum dump was carried out on Behind on day 34 (Feb 3), imparting a delta-V of 0.0584 m/s. * The average daily SSR downlink was 5.8 gigabits for Ahead, and 5.2 gigabits for Behind. * There were some delays in level 0 processing due to contentions for the archive server. This affected Ahead on Friday and Saturday, and Behind on Sunday. Week 6 * Behind is scheduled to use the 70 meter station 43 on Feb 14. This track will be carried out at 720 kbps. The pass duration is 7 hours. * The MOC will move pointers during the Ahead track on day 42 (Feb 11), due to a longer than usual gap between tracks. The same procedure was carried out on both spacecraft on Monday (Feb 8). Week 7 * A 5.4 hour pass using the 70 meter station 43 is scheduled for Behind on Saturday, day 51 (Feb 20). This track will be carried out at 720 kbps. Week 8 * The 12th SECCHI stepped calibration roll on Ahead will be carried out on day 54 (Feb 23), starting at 02:10. This will be the midpoint roll. The system momentum is expected to be 6 N-m-s. COORDINATED OBSERVATIONS ------------------------ ------------------------------------------------------------------------------- Scheduled activities for Week 06: M Feb 08 (039) Both: Move pointers during pass T Feb 09 (040) W Feb 10 (041) T Feb 11 (042) Ahead: Move pointers during pass F Feb 12 (043) S Feb 13 (044) S Feb 14 (045) Behind: 720 kbps downlink on station 43 ------------------------------------------------------------------------------- Scheduled activities for Week 07: M Feb 15 (046) T Feb 16 (047) W Feb 17 (048) T Feb 18 (049) F Feb 19 (050) S Feb 20 (051) Behind: 720 kbps downlink on station 43 S Feb 21 (052) ------------------------------------------------------------------------------- Scheduled activities for Week 08: M Feb 22 (053) T Feb 23 (054) Ahead: SECCHI stepped calibration roll, 2:10 UT W Feb 24 (055) T Feb 25 (056) F Feb 26 (057) S Feb 27 (058) S Feb 28 (059) ------------------------------------------------------------------------------- Upcoming events: 2010: ICAL-001: Jan 11-15, Feb 15-19, Mar 15-19, Apr 12-16, May 3-7 SECCHI Stepped calibration rolls Ahead: Feb 23, May 18, Aug 10, Nov 2 Behind: Apr 6, Jul 13, Oct 12 * Spring (TBD) SUMI sounding rocket launch http://adsabs.harvard.edu/abs/2008AGUSMSP51B..01A * Apr 8,15 EIT shutterless (TBC) * Apr 19 Ahead: Begin 7 hour daily DSN tracks * Apr 26 Ahead: Switch downlink rate to 240 kbps * Jul 8,15 EIT shutterless (TBC) * Jul 11 Total solar eclipse http://eclipse.gsfc.nasa.gov/SEmono/TSE2010/TSE2010.html * Jul 14 Both: HGA calibration * Sep 7 Both: Begin 8 hour daily DSN tracks * Sep 13 Both: Switch downlink rate to 160 kbps * Nov 15 Behind: Switch downlink rate to 120 kbps 2011: * Jan 12 Both: HGA calibration * Feb 6 STEREO spacecraft at 180 degree separation * Mar 18 Messenger - Mercury orbital insertion * Apr 11 Ahead: Switch downlink rate to 120 kbps * Jul 13 Both: HGA calibration * Aug DAWN - Vesta arrival * Sep 19 Behind: Switch downlink rate to 96 kbps * Sep 26 Ahead: Switch downlink rate to 96 kbps 2012: * Jan 11 Both: HGA calibration * May DAWN - Vesta departure * Jul 11 Both: HGA calibration * Aug Both: Switch downlink rate to 30 kbps * Nov 13 Total solar eclipse, south Pacific 2013: * Dec 12 Ahead: Mercury transit 2014: * Apr 29 Behind: Mercury transit 2015: * Feb DAWN - Ceres arrival * Jan 10 - Apr 12 Behind: Spacecraft behind Sun * Feb 17 - Aug 2 Ahead: Spacecraft behind Sun * Jul 23 - Nov 10 Behind: Spacecraft behind Sun * Jul DAWN - End of nominal mission 2016: 2017: 2018: * Mar 5 Ahead: Mercury transit