STEREO Weekly Meeting Minutes for 2010-07-27 (Week 30) ANNOUNCEMENTS ------------- INSTRUMENT and SPACECRAFT STATUS -------------------------------- * All subsystems on both spacecraft are nominal. DISCUSSION AND OPERATIONS CONSTRAINTS ------------------------------------- Week 29 * The 25th momentum dump on Behind was successfully carried out on day 203, Thursday, Jul 22, starting at 17:00 UT. A delta-V of 0.0605 m/s was imparted. * The average daily SSR playback was 5.2 gigabits for Ahead, and 4.9 gigabits for Behind. Week 30 * Ahead coverage is 4.5 hours above nominal during the week. Behind coverage is 4.8 hours below nominal, but the tracks are well spaced. * The SUMI sounding rocket launch is scheduled for Jul 30 at 19:11 UT. Normal STEREO synoptic data is requested. Week 31 * Ahead will have a 70 meter track late on day 217 (Aug 5), using station 43 in Canberra. This track will be carried out at 720 kbps. No spacecraft telemetry will be downloaded during this 3 hour track. * The 14th SECCHI stepped calibration roll will be carried out on Behind on day 215 (Aug 3), starting at 14:00 UT. This is the midpoint roll. * Behind will have a 70 meter track on Aug 7, using station 43 in Canberra. This track will be carried out at 720 kbps. * Track coverage for both Ahead and Behind during the week is about even. Behind has 3 short tracks on Tuesday, Wednesday, and Thursday. Spacecraft housekeeping will not be read out during these tracks. Week 32 * The 14th SECCHI stepped calibration roll on Ahead will be carried out on Aug 10 starting at 08:10 UT. The system momentum will be about 1-2 N-m-s. * Track coverage during the week will be about 4.7 hours above nominal for Ahead, and 1.8 hours above nominal for Behind, with good spacing. Week 33 * Ahead will have a 70 meter track on day 231, Thursday, Aug 19, using station 63 in Madrid. This track will be carried out at 720 kbps and last 3 hrs. * There are some short tracks for Ahead and Behind. No spacecraft telemetry will be downloaded during these tracks. * Behind will have a 70 meter track on Saturday, Aug 21 using the station 43 in Canberra. This track will be carried out at 720 kbps and last just over 6 hours * Overall track coverage for Ahead is 4.7 hours above nominal during the week. For Behind it is 3.1 hours below nominal, but no in situ data are expected to be lost. Week 34 * Ahead will have a 70 meter track on Thurs. Aug 26 using station 63 in Madrid. This track will be carried out at 720 kbps and will last 3 hrs * Behind will have a 70 meter track on Sunday Aug 29 using station 43 in Canberra. This track will be carried out at 720 kbps. * Overall track coverage during the week is 1.4 hours above nominal for Ahead, and 3.3 hours above nominal for Behind. Week 35 * Momentum dump #32 for Ahead during the week is scheduled for Aug 31, starting at 13:30 UT. * There will be a 70 meter track for Ahead on Aug 31, and again on Sep 3, and a 70 meter track for Behind on Sep 1, all using station 63 in Madrid. These tracks will be carried out at 720 kbps. * Track coverage for Ahead is 3.8 hours above nominal, while track coverage for Behind is even. Week 36 * Ahead and Behind were originally scheduled to go to 8 hour track schedules this week, but that has now been pushed back to spring or summer of next year. * There are a number of 70 meter stations scheduled during the week. These tracks will be carried out at 720 kbps. 70 meter tracks for Ahead occur on days 249 (Sep 6), 252 (Sep 9) and 255 (Sep 12), all using station 63 in Madrid. Behind has 70 meter tracks on day 250 (Sep 7) using station 43 in Canberra, and on day 253 (Sep 10) using station 63 in Madrid. * The 26th momentum dump on Behind will be carried out on day 250 (Sep 7), starting at 22:30 UT. * Overall coverage during the week for Ahead is 15.3 hours above nominal, and 4.2 hours above nominal for Behind. COORDINATED OBSERVATIONS ------------------------ ------------------------------------------------------------------------------- Scheduled activities for Week 28: M Jul 12 (193) T Jul 13 (194) W Jul 14 (195) Ahead: 720 kbps downlink on station 63 T Jul 15 (196) Ahead: HGA Calibration, 15:00 UT F Jul 16 (197) Ahead: Momentum dump, 14:00 UT S Jul 17 (198) S Jul 18 (199) ------------------------------------------------------------------------------- Scheduled activities for Week 29: M Jul 19 (200) Ahead: 720 kbps downlink on station 63 T Jul 20 (201) W Jul 21 (202) T Jul 22 (203) Behind: Momentum dump, 17:00 UT F Jul 23 (204) S Jul 24 (205) S Jul 25 (206) ------------------------------------------------------------------------------- Scheduled activities for Week 30: M Jul 26 (207) T Jul 27 (208) W Jul 28 (209) T Jul 29 (210) F Jul 30 (211) SUMI sounding rocket launch, 19:11 UT http://adsabs.harvard.edu/abs/2008AGUSMSP51B..01A S Jul 31 (212) S Aug 01 (213) ------------------------------------------------------------------------------- Scheduled activities for Week 31: M Aug 02 (214) T Aug 03 (215) Behind: SECCHI stepped calibration roll, 14:00 UT W Aug 04 (216) T Aug 05 (217) Ahead: 720 kbps downlink on station 43 F Aug 06 (218) S Aug 07 (219) Behind: 720 kbps downlink on station 43 S Aug 08 (220) ------------------------------------------------------------------------------- Scheduled activities for Week 32: M Aug 09 (221) T Aug 10 (222) Ahead: SECCHI stepped calibration roll, 08:10 UT W Aug 11 (223) T Aug 12 (224) F Aug 13 (225) S Aug 14 (226) S Aug 15 (227) ------------------------------------------------------------------------------- Scheduled activities for Week 33: M Aug 16 (228) T Aug 17 (229) W Aug 18 (230) T Aug 19 (231) Ahead: 720 kbps downlink on station 63 F Aug 20 (232) S Aug 21 (233) Behind: 720 kbps downlink on station 43 S Aug 22 (234) ------------------------------------------------------------------------------- Scheduled activities for Week 34: M Aug 23 (235) T Aug 24 (236) W Aug 25 (237) T Aug 26 (238) Ahead: 720 kbps downlink on station 63 F Aug 27 (239) S Aug 28 (240) S Aug 29 (241) Behind: 720 kbps downlink on station 43 ------------------------------------------------------------------------------- Scheduled activities for Week 35: M Aug 30 (242) T Aug 31 (243) Ahead: 720 kbps downlink on station 63 Ahead: Momentum dump, 13:30 UT W Sep 01 (244) Behind: 720 kbps downlink on station 63 T Sep 02 (245) F Sep 03 (246) Ahead: 720 kbps downlink on station 63 S Sep 04 (247) S Sep 05 (248) ------------------------------------------------------------------------------- Scheduled activities for Week 36: M Sep 06 (249) Ahead: 720 kbps downlink on station 63 T Sep 07 (250) Behind: 720 kbps downlink on station 43 Behind: Momentum dump, 22:30 UT W Sep 08 (251) T Sep 09 (252) Ahead: 720 kbps downlink on station 63 F Sep 10 (253) Behind: 720 kbps downlink on station 63 S Sep 11 (254) S Sep 12 (255) Ahead: 720 kbps downlink on station 63 ------------------------------------------------------------------------------- Upcoming events: 2010: SECCHI Stepped calibration rolls Ahead: Nov 2 Behind: Oct 12 2011: * Spring/Summer Ahead: End use of 720 kbps on 70 m DSN subnet * Spring/Summer Behind: End use of 720 kbps on 70 m DSN subnet * Jan 12 Both: HGA calibration * Feb 6 STEREO spacecraft at 180 degree separation * Mar Behind: Switch downlink rate to 160 kbps * Mar 18 Messenger - Mercury orbital insertion * Jul DAWN - Vesta arrival * Jul 13 Both: HGA calibration 2012: * Jan 11 Both: HGA calibration * Jun Ahead: Switch downlink rate to 160 kbps * Jul DAWN - Vesta departure * Jul 11 Both: HGA calibration * 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 (TBC) Behind: Spacecraft behind Sun * Feb 17 - Aug 2 (TBC) Ahead: Spacecraft behind Sun * Jul 23 - Nov 10 (TBC) Behind: Spacecraft behind Sun * Jul DAWN - End of nominal mission 2016: 2017: 2018: * Mar 5 Ahead: Mercury transit