STEREO Weekly Meeting Minutes for 2010-11-16 (Week 46) ANNOUNCEMENTS ------------- * The STEREO Science Center will be moving from building 26 at Goddard to building 21. The current anticipated date of the move is now Nov 29, with the computers being turned off starting the evening of Nov. 28. See below for details. INSTRUMENT and SPACECRAFT STATUS -------------------------------- * All subsystems on both spacecraft are nominal. DISCUSSION AND OPERATIONS CONSTRAINTS ------------------------------------- Week 45 * Turbo decoder lock was lost intermittently on the following days: Ahead, Day 313, Station 65, 04:10-04:19 UT and again at 04:34-04:39 UT due to heavy rain. Several minutes of instrument SSR data were lost. Ahead, Day 318, Station 54, 07:47 - 08:10 UT, several minutes of instrument SSR data lost. Behind, Day 314, Station 65, 18:37 UT, Two frames of instrument SSR data lost. Behind, Day 316, Station 65, 17:20-17:32 UT, 31 frames of instrument SSR data lost. * On day 314 Madrid changed to DCD system. This change will eventually be made at other stations. * On day 314 new tables were loaded to the IMPACT SIT instrument on Behind. * The 15th SECCHI stepped calibration roll was carried out on Ahead on day 315 starting at 08:30 UT on day 315. This was the aphelion roll. * On day 317, the SECCHI SSR1 partition on Ahead filled at 05:00 UT during the DSS 63 support which was configured for a high downlink rate. The autonomy rule to free SSR space did not fire during the track as it only fires for low downlink rates supports. This resulted in the loss of 3.25 hours SECCHI instrument SSR data. A change request has been submitted to enable the autonomy rule for the all downlink rates. * On day 317, the PLASTIC partition on Behind filled at 19:34 UT during Station 15 support, due to insufficient track time earlier in the week. The autonomy rule to free SSR space fired at 20:46 UT. This resulted in the loss of 1.2 hours PLASTIC instrument SSR data. * The average daily SSR downlink was 5.5 gigabits for Ahead, and 4.5 gigabits for Behind. Week 46 * Ahead has 720 kbps passes on Monday, Nov 15, and Friday, Nov 19, both using station 14. There are 14 tracks during the week, and overall coverage is nominal. * Behind has 720 kbps passes on Monday, Nov 15, using station 43, and Sunday, Nov 21, using station 14. There are 13 tracks during the week, and overall coverage is 3.3 hours below nominal. Track coverage is particularly low on Wednesday (tomorrow), with a single 3.8 hour track. This should lead to problems for SECCHI, but not the in situ instruments. * There is a station 25 shadow track for Behind starting on day 320. These shadow tracks are for testing. Do not plan for these tracks. Week 47 * Thursday, Nov 25 is Thanksgiving in US. Friday, Nov 26 is also a holiday at APL. The MOC will be operating unattended both days. * Ahead has 720 kbps passes on Tuesday, Nov 24, using station 63, and Sunday, Nov 28, using station 14. There are 14 tracks during the week, and overall coverage is nominal. * Behind has 720 kbps passes on Monday, Nov 23, using station 63, and Friday, Nov 26, using station 14. There are 14 tracks during the week, and overall coverage is nominal. More shadow tracks days 327 and 328. Week 48 * The 34th momentum dump on Ahead will be carried out Thursday, Dec 2, with ignition at 15:00 UT. * Ahead has 720 kbps passes on Monday, Nov 29, Wednesday, Dec 1, Thursday, Dec 2, and Saturday, Dec 4. The Monday pass uses station 14; the rest use station 63. There are 14 tracks during the week, and overall coverage is nominal. * Behind has 720 kbps passes on Friday Dec. 3 and Sunday, Dec 5, using station 63. There are 12 tracks during the week, and overall coverage is 2 hours below nominal. Another shadow track starting on day 335. Week 49 * Ahead has a 720 kbps pass on Tuesday, Dec 7, using station 43. There are 14 passes during the week, and overall coverage is nominal. * Behind has a 720 kbps pass on Wednesday, Dec 8, using station 63. There are 11 passes during the week, and overall coverage is 1.8 hours above nominal. Week 50 * The 28th momentum dump on Behind will be performed on Dec 15, with ignition at 17:30 UT. * Ahead has 720 kbps passes on Monday, Dec 13, using station 43, on Thursday, Dec 16, using station 43, and on Saturday, Dec 18, using station 63. There are 13 passes during the week, and overall coverage is nominal. * Behind has a 720 kbps pass on Wednesday, Dec 15, using station 63. There are 11 passes during the week, and overall coverage is nominal. Week 51 * Christmas is on Saturday, Dec 25. Friday, Dec 24 is a holiday at APL. * Ahead has 720 kbps passes on Monday Dec 20 (D43), Wednesday, Dec 22 (D43), and Saturday, Dec 25 (D43). There are 13 passes during the week, and overall coverage is nominal. * Behind has 720 kbps passes on Monday, Dec 20 (D63), Tuesday, Dec 21 (D63), Thursday, Dec 23 (D14), and Saturday, Dec 25 (D43). There are 10 passes during the week, and overall coverage is 3.2 hours below nominal. Week 52 * New Year's Day is on Saturday, Jan 1. Friday, Dec 31 is a holiday at APL. * Ahead has a 720 kbps pass on Wednesday, Dec 29 using station 43. There are 14 passes during the week, and overall coverage is nominal. * Behind has a 720 kbps pass on Friday, Dec 31, using station 43. There are 12 passes during the week, and overall coverage is 1.75 hours above nominal. Week 1 * Ahead has two 720 kbps passes on Wednesday, Jan 5 using stations 14 and 43. There are 14 passes during the week, and overall coverage is nominal * Behind has 720 kbps passes on Monday, Jan 3 (D63), Tuesday, Jan 4 (D43), Wednesday, Jan 5 (D63), Thursday, Jan 6 (D63), and Friday, Jan 7 (D63). There are 14 passes during the week, and overall coverage is nominal. Other * The current anticipated date for the SSC move within Goddard is Monday, Nov 29. The system will be shut down the night before the move. Users should anticipate that it may take a couple of days to bring the system back online. The entire SDAC system is moving over, including both SOHO and STEREO. COORDINATED OBSERVATIONS ------------------------ ------------------------------------------------------------------------------- Scheduled activities for Week 46: M Nov 15 (319) Ahead: 720 kbps downlink on station 14 Behind: 720 kbps downlink on station 43 T Nov 16 (320) W Nov 17 (321) T Nov 18 (322) F Nov 19 (323) Ahead: 720 kbps downlink on station 14 S Nov 20 (324) S Nov 21 (325) Behind: 720 kbps downlink on station 14 ------------------------------------------------------------------------------- Scheduled activities for Week 47: M Nov 22 (326) Behind: 720 kbps downlink on station 63 T Nov 23 (327) Ahead: 720 kbps downlink on station 63 W Nov 24 (328) T Nov 25 (329) US Thanksgiving F Nov 26 (330) Behind: 720 kbps downlink on station 14 S Nov 27 (331) S Nov 28 (332) Ahead: 720 kbps downlink on station 14 Notes: * APL closed both Nov 25 and Nov 26 ------------------------------------------------------------------------------- Scheduled activities for Week 48: M Nov 29 (333) Ahead: 720 kbps downlink on station 14 T Nov 30 (334) W Dec 01 (335) Ahead: 720 kbps downlink on station 63 T Dec 02 (336) Ahead: Momentum dump, 15:00 UT Ahead: 720 kbps downlink on station 63 F Dec 03 (337) Behind: 720 kbps downlink on station 63 S Dec 04 (338) Ahead: 720 kbps downlink on station 63 S Dec 05 (339) Behind: 720 kbps downlink on station 63 ------------------------------------------------------------------------------- Scheduled activities for Week 49: M Dec 06 (340) T Dec 07 (341) Ahead: 720 kbps downlink on station 43 W Dec 08 (342) Behind: 720 kpbs downlink on station 63 T Dec 09 (343) F Dec 10 (344) S Dec 11 (345) S Dec 12 (346) ------------------------------------------------------------------------------- Scheduled activities for Week 50: M Dec 13 (347) Ahead: 720 kbps downlink on station 43 T Dec 14 (348) W Dec 15 (349) Behind: Momentum dump, 17:30 UT Behind: 720 kpbs downlink on station 63 T Dec 16 (350) Ahead: 720 kbps downlink on station 43 F Dec 17 (351) S Dec 18 (352) Ahead: 720 kbps downlink on station 63 S Dec 19 (353) ------------------------------------------------------------------------------- Scheduled activities for Week 51: M Dec 20 (354) Ahead: 720 kbps downlink on station 43 Behind: 720 kpbs downlink on station 63 T Dec 21 (355) Behind: 720 kpbs downlink on station 63 W Dec 22 (356) Ahead: 720 kbps downlink on station 43 T Dec 23 (357) Behind: 720 kpbs downlink on station 14 F Dec 24 (358) S Dec 25 (359) Christmas Ahead: 720 kbps downlink on station 43 Behind: 720 kpbs downlink on station 43 S Dec 26 (360) Notes: * APL will be closed on Dec 24 ------------------------------------------------------------------------------- Scheduled activities for Week 52: M Dec 27 (361) T Dec 28 (362) W Dec 29 (363) Ahead: 720 kbps downlink on station 43 T Dec 30 (364) F Dec 31 (365) Behind: 720 kpbs downlink on station 43 S Jan 01 (001) New Years S Jan 02 (002) Notes: * APL will be closed on Dec 31 ------------------------------------------------------------------------------- Scheduled activities for Week 01: M Jan 03 (003) Behind: 720 kpbs downlink on station 63 T Jan 04 (004) Behind: 720 kpbs downlink on station 43 W Jan 05 (005) Ahead: 720 kbps downlink on both stations 14 and 43 Behind: 720 kpbs downlink on station 63 T Jan 06 (006) Behind: 720 kpbs downlink on station 63 F Jan 07 (007) Behind: 720 kpbs downlink on station 63 S Jan 08 (008) S Jan 09 (009) ------------------------------------------------------------------------------- Upcoming events: 2011: * Jan 12 Both: HGA calibration * Feb 6 STEREO spacecraft at 180 degree separation * Jun 27 Ahead: Switch downlink rate to 160 kbps * Jun 27 Ahead: End use of 720 kbps on 70 m DSN subnet * Jul 15 Behind: Switch downlink rate to 160 kbps * Jul 15 Behind: End use of 720 kbps on 70 m DSN subnet * Mar 18 Messenger - Mercury orbital insertion * Jul DAWN - Vesta arrival * Jul 13 Both: HGA calibration 2012: * Jan 11 Both: HGA calibration * Jul DAWN - Vesta departure * Jul 11 Both: HGA calibration * Nov 4 Behind: Switch downlink rate to 120 kbps * Nov 13 Total solar eclipse, south Pacific 2013: * May 3 Ahead: Switch downlink rate to 120 kbps * Dec 12 Ahead: Mercury transit 2014: * Jan 20 Behind: End use of 480 kbps on 70 m DSN subnet * Apr 21 Behind: Resume use of 480 kbps on 70 m DSN subnet * Apr 29 Behind: Mercury transit * Oct 15 Behind: End use of 480 kbps on 70 m DSN subnet 2015: * Feb DAWN - Ceres arrival * Jan 20 - Mar 28 (TBC) Behind: Spacecraft behind Sun * Mar 17 - Jul 14 (TBC) Ahead: Spacecraft behind Sun * Jul 2 Behind: Resume use of 480 kbps on 70 m DSN subnet * Aug 25 - Oct 19 (TBC) Behind: Spacecraft behind Sun * Sep 25 Behind: End use of 480 kbps on 70 m DSN subnet * Jul DAWN - End of nominal mission 2016: * Apr 3 Behind: Resume use of 480 kbps on 70 m DSN subnet 2017: * Jul 11 Ahead: Switch downlink rate to 160 kbps * Jul 22 Behind: Switch downlink rate to 160 kbps 2018: * Mar 5 Ahead: Mercury transit