STEREO Weekly Meeting Minutes for 2010-03-16 (Week 11) ANNOUNCEMENTS ------------- * None. INSTRUMENT and SPACECRAFT STATUS -------------------------------- * All subsystems on both spacecraft are nominal. DISCUSSION AND OPERATIONS CONSTRAINTS ------------------------------------- Week 10 * Last minute track schedule changes were made to assist the new GOES satellite. The Ahead track on day 69 (Mar 10) originally scheduled on station 54 starting at 5:30 UT was shifted to station 55 from 6:15-12:15 UT. The Ahead track on station 55 on day 70 (Mar 11) originally scheduled for 7-12:10 UT was shifted to station 63, and was 20 minutes shorter than originally planned. * The 28th momentum dump was successfully carried out on Ahead on day 67 (Mar 8), with ignition at 15:30 UT. A delta-V or 0.0794 m/s was imparted. * The station 26 antenna stopped tracking at 22:07 UT during the Behind pass on day 70 (Mar 11). Tracking was re-established at 22:44 UT. This resulted in the loss of 33 minutes of command and tracking data, and about an hour of SSR data for all instruments. * The average daily SSR downlink was 5.2 gigabits for Ahead, and 4.2 gigabits for Behind. Week 11 * There is a 4 hour track on Ahead on day 76 (Mar 17). * There is a 70 meter track on station 43 for Behind on Thursday (Mar 18) which will be carried out at 720 kbps. This will follow a 24 hour gap, and SSR pointers will be moved during the pass. * The 22nd momentum dump will be carried out on Behind on day 77 (Mar 18), with ignition starting at 21:30 UT. Week 12 * There is a 70 meter track on station 43 for Behind on day 84 (Mar 25) which will be carried out at 720 kbps. This will follow a 23 hour gap, and pointers will be moved during the pass. Week 13 * There is a 70 meter track on station 43 for Behind on day 91 (Apr 1) which will be carried out at 720 kbsp. This will follow a 21 hour gap, and pointers will be moved during the pass. * Behind will reach aphelion on Sunday, Apr 4 at 17:59 UT. Week 14 * The 13th SECCHI stepped calibration roll will be carried out on Behind on Apr 6. The system momentum is predicted to be ~2 N-m-s. * There is a 70 meter track on station 43 for Behind on day 100 (Apr 10), which will be carried out at 720 kbps. Week 15 * There are two shorter than usual tracks on Behind during the week. Week 16 * Switch to 7 hour DSN tracks for Ahead starting Apr 19 Week 17 * Switch to 240 kbps rate for Ahead starting Apr 26 Other * PLASTIC hit 95% full several times recently. Also SWAVES approached 100% full yesterday (Mar 16). * Although next week will be the STEREO SWG meeting in Dublin, the regular weekly telecon will be held. COORDINATED OBSERVATIONS ------------------------ ------------------------------------------------------------------------------- Scheduled activities for Week 10: M Mar 08 (067) Ahead: Momentum dump, 15:30 UT T Mar 09 (068) W Mar 10 (069) T Mar 11 (070) F Mar 12 (071) S Mar 13 (072) S Mar 14 (073) Daily Savings Time starts in U.S. ------------------------------------------------------------------------------- Scheduled activities for Week 11: M Mar 15 (074) T Mar 16 (075) W Mar 17 (076) ICAL01: 11 UT T Mar 18 (077) Behind: 720 kbps downlink on station 43. Pointers moved. Behind: Momentum dump, 21:30 UT F Mar 19 (078) S Mar 20 (079) S Mar 21 (080) ------------------------------------------------------------------------------- Scheduled activities for Week 12: M Mar 22 (081) T Mar 23 (082) W Mar 24 (083) T Mar 25 (084) Behind: 720 kbps downlink on station 43. Pointers moved. F Mar 26 (085) S Mar 27 (086) S Mar 28 (087) ------------------------------------------------------------------------------- Scheduled activities for Week 13: M Mar 29 (088) T Mar 30 (089) W Mar 31 (090) T Apr 01 (091) Behind: 720 kbps downlink on station 43. Pointers moved. F Apr 02 (092) S Apr 03 (093) S Apr 04 (094) ------------------------------------------------------------------------------- Scheduled activities for Week 14: M Apr 05 (095) T Apr 06 (096) Behind: SECCHI stepped calibration roll W Apr 07 (097) T Apr 08 (098) EIT shutterless (TBC) F Apr 09 (099) S Apr 10 (100) Behind: 720 kbps downlink on station 43. S Apr 11 (101) ------------------------------------------------------------------------------- Scheduled activities for Week 15: M Apr 12 (102) T Apr 13 (103) W Apr 14 (104) T Apr 15 (105) EIT shutterless (TBC) F Apr 16 (106) S Apr 17 (107) S Apr 18 (108) ------------------------------------------------------------------------------- Scheduled activities for Week 16: M Apr 19 (109) Ahead: Begin 7 hour daily DSN tracks T Apr 20 (110) W Apr 21 (111) T Apr 22 (112) F Apr 23 (113) S Apr 24 (114) S Apr 25 (115) ------------------------------------------------------------------------------- Scheduled activities for Week 17: M Apr 26 (116) Ahead: Switch downlink rate to 240 kbps T Apr 27 (117) W Apr 28 (118) T Apr 29 (119) F Apr 30 (120) S May 01 (121) S May 02 (122) ------------------------------------------------------------------------------- Upcoming events: 2010: ICAL-001: Mar 15-19, Apr 12-16, May 3-7 SECCHI Stepped calibration rolls Ahead: May 18, Aug 10, Nov 2 Behind: Jul 13, Oct 12 * Jun 8 SUMI sounding rocket launch http://adsabs.harvard.edu/abs/2008AGUSMSP51B..01A * 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 * Aug 23 Ahead: End use of 720 kbps on 70 m DSN subnet * Sep 6 Behind: End use of 720 kbps on 70 m DSN subnet * 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 DAWN - Vesta arrival * Jul 13 Both: HGA calibration * Sep 19 Behind: Switch downlink rate to 96 kbps * Sep 26 Ahead: Switch downlink rate to 96 kbps 2012: * Jan 9 Behind: End use of 480 kbps on 70 m DSN subnet * Jan 11 Both: HGA calibration * Jun 25 Ahead: End use of 480 kbps on 70 m DSN subnet * Jul DAWN - Vesta departure * Jul 11 Both: HGA calibration * Aug 20 Both: Switch downlink rate to 30 kbps * Nov 13 Total solar eclipse, south Pacific 2013: * Nov 25 Behind: End use of 360 kbps on 70 m DSN subnet * 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 * May 25 Ahead: End use of 360 kbps on 70 m DSN subnet * Aug 10 Ahead: Begin use of 360 kbps on 70 m DSN subnet * Jul 23 - Nov 10 Behind: Spacecraft behind Sun * Jul DAWN - End of nominal mission 2016: 2017: 2018: * Mar 5 Ahead: Mercury transit