STEREO Weekly Meeting Minutes for 2012-02-07 (Week 06) ANNOUNCEMENTS ------------- * None INSTRUMENT and SPACECRAFT STATUS -------------------------------- * All subsystems on both spacecraft are nominal. DISCUSSION AND OPERATIONS CONSTRAINTS ------------------------------------- Week 5 (Jan 30-Feb 5) * On day 030 (Jan 30), during the DSS-63 support for Ahead, turbo decoder lock was lost briefly beginning at 0923z. This anomaly resulted in the loss of five frames of SSR data. See DR# N107919 for more information. * On day 036 (Feb 5), during the DSS-55 support for Ahead, turbo decoder lock was lost briefly beginning at 0953z. This anomaly resulted in the loss of four frames of SSR data. A DR has been requested. * On day 032 (Feb 1), the 44th momentum dump was successfully executed on Ahead at 1700Z, which imparted a delta V of 0.0947 m/sec. * On day 030 (Jan 30), for the DSS 43 support for Behind, the transmitter was declared red prior to the start of the track at 2350z. This anomaly resulted in the loss of all commanding and two-way tracking data for the duration of the support. All SSR data were received. See DR# C108497 for more information. * On day 032 (Feb 1), during the DSS-15 support for Behind, real-time telemetry was lost at 2145z due to a DCD anomaly. The redundant DCD was placed on-line and real-time telemetry was received again at 2214z. This anomaly resulted in the loss of two hours of SSR data for each instrument. See DR# G112321 for more information. The MOC has requested that the DSN try to recover the data. * On day 033 (Feb 2), during the DSS-63 support for Behind, turbo decoder lock was lost briefly at 1620z. This anomaly resulted in the loss of 180 frames of SSR data. See DR# N107925 for more information. * On day 036 (Feb 5), during the DSS-25 support for Behind, turbo decoder lock was lost briefly at 0152z. This anomaly resulted in the loss of one frame of SSR data. A DR has been requested. * On day 032 (Feb 1), the 38th momentum dump was successfully executed on Behind at 2300Z, which imparted a delta V of 0.0811 m/sec. * The average daily SSR playback volume was 4.9 gigabits for Ahead and 5.2 gigabits for Behind. Week 6 (Feb 6-12) * There is a shadow track for Ahead using station 24 on Wednesday, Feb 8, for APCA testing. The operational track is on station 26. The shadow track will be downlink only, and the data should not be visible in the MOC. * Ahead has 70 meter passes on Tuesday, Feb 7, Thursday, Feb 9, Friday, Feb 10, Saturday, Feb 11, and Sunday, Feb 12, all using station D14. There are 10 passes during the week, and overall coverage is nominal. * Behind has 70 meter passes on Tuesday, Feb 7 (D63), Wednesday, Feb 8 (D63), Thursday, Feb 9 (D63), Friday, Feb 10 (D14 at 720 kbps), and Sunday, Feb 12 (D63). There are 11 passes during the week, and overall coverage is nominal. The station 55 pass on Monday, Feb 6 will be carried out at 240 kbps. Week 7 (Feb 13-19) * The 20th SECCHI stepped calibration on Behind is scheduled for Tuesday, Feb 14, starting at 07:05 UT. System momentum is expected to be 5 N-m-s. * Ahead has 70 meter passes on Wednesday, Feb 15 (D14), Friday, Feb 17 (D14), Saturday, Feb 18 (D43), and Sunday, Feb 19 (D43). There are 9 passes during the week, and overall coverage is nominal. * Behind has 70 meter passes on Monday, Feb 13 (D63), Tuesday, Feb 14 (D63 at 720 kbps), Wednesday, Feb 15 (D14), Friday, Feb 17 (D14), Saturday, Feb 18 (D63), and Sunday, Feb 19 (D63, D43). There are 12 passes during the week, and overall coverage is nominal. A pass is scheduled with the ESA New Norcia station on Sunday, Feb 19. Week 8 (Feb 20-26) * Ahead has 70 meter passes on Monday, Feb 20 (D14), Tuesday, Feb 21 (D14, D43 at 720 kbps), Thursday, Feb 23 (D14), Saturday, Feb 25 (D14), and Sunday, Feb 26 (D14, D43 at 720 kbps). There are 9 passes during the week, and overall coverage is nominal. * Behind has 70 meter passes on Tuesday, Feb 21 (D14 at 720 kbps), Wednesday, Feb 22 (D43), Thursday, Feb 23 (D43), and Friday, Feb 24 (D14 at 720 kbps). There are 8 passes during the week, and overall coverage is nominal. A pass is scheduled with the ESA New Norcia station on Friday, Feb 24. Week 9 (Feb 27-Mar 4) * Ahead has 70 meter passes on Tuesday, Feb 28 (D14), Friday, Mar 2 (D43), and Saturday, Mar 3 (D43 at 720 kbps). There are 11 passes during the week, and overall coverage is nominal. The station 26 pass on Friday, Mar 2, will be carried out at 240 kbps. * Behind has 70 meter passes on Tuesday, Feb 28 (D43), and Thursday, Mar 1 (D14), both at 720 kbps. There are 12 passes during the week, and overall coverage is nominal. The station 45 pass on Friday, Mar 2, will be carried out at 240 kbps. Passes are scheduled with the ESA New Norcia station on Monday, Feb 27, and Sunday, Mar 4. Week 10 (Mar 5-11) * The 45th momentum dump is scheduled for Ahead on Monday, day 65 (Mar 5), starting at 18:00 UT. * The 39th momentum dump is scheduled for Behind on Thursday, day 68 (Mar 8), starting at 16:00 UT. * A PIT test is scheduled on Friday, Mar 9, using station 15 with Ahead. * Sunday, Mar 11, marks the start of daylight savings time in the U.S. * Ahead has 70 meter passes on Tuesday, Mar 6, Wednesday, Mar 7, Friday, Mar 9, Saturday, Mar 10, and Sunday, Mar 11, all using station 14. There are 13 passes during the week, and overall coverage is nominal. The station 54 pass on Sunday, Mar 11, will be carried out at 240 kbps. Passes are scheduled with the ESA New Norcia station on Monday, Mar 5, and Friday, Mar 9. * Behind has 70 meter passes on Friday, Mar 9, and Saturday, Mar 10, both using station 43. There are 13 passes during the week, and overall coverage is nominal. The station 45 pass on Monday, Mar 5, the station 55 pass on Wednesday, Mar 7, and the station 24 pass on Sunday, Mar 11, will all be carried out at 240 kbps. Week 11 (Mar 12-18) * Ahead has 70 meter passes on Monday, Mar 12 (D63), Wednesday, Mar 14 (D63), Saturday, Mar 17 (D63), and Sunday, Mar 18 (D43). There are 10 passes during the week, and overall coverage is nominal. An ESA New Norcia pass is scheduled for Thursday, Mar 15. * Behind has 70 meter passes on Monday, Mar 12 (D43), Tuesday, Mar 13 (D63), and Friday, Mar 16 (D63). There are 11 passes during the week, and overall coverage is nominal. The station 65 pass on Wednesday, Mar 14, and the station 24 pass on Thursday, Mar 15, will both be carried out at 240 kbps. Week 12 (Mar 19-25) * Ahead has 70 meter passes on Tuesday, Mar 20, Friday, Mar 23, and Sunday, Mar 25, all using station 43. There are 9 passes during the week, and overall coverage is nominal. * Behind has 70 meter passes on Monday, Mar 19 (D63), Tuesday, Mar 20 (D63), Friday, Mar 23 (D43), Saturday, Mar 24 (D63), and Sunday, Mar 25 (D63). There are 11 passes during the week, and overall coverage is nominal. The station 54 pass on Wednesday, Mar 21, will be carried out at 240 kbps. COORDINATED OBSERVATIONS ------------------------ ------------------------------------------------------------------------------- Scheduled activities for Week 06: M Feb 06 (037) T Feb 07 (038) Ahead: 70 meter downlink on station 14 Behind: 70 meter downlink on station 63 W Feb 08 (039) Ahead: Shadow track using station 24 Behind: 70 meter downlink on station 63 T Feb 09 (040) Ahead: 70 meter downlink on station 14 Behind: 70 meter downlink on station 63 F Feb 10 (041) Ahead: 70 meter downlink on station 14 Behind: 70 meter downlink on station 14 S Feb 11 (042) Ahead: 70 meter downlink on station 14 S Feb 12 (043) Ahead: 70 meter downlink on station 14 Behind: 70 meter downlink on station 63 ------------------------------------------------------------------------------- Scheduled activities for Week 07: M Feb 13 (044) Behind: 70 meter downlink on station 63 T Feb 14 (045) Behind: SECCHI stepped calibration, 07:05 UT Behind: 70 meter downlink on station 63 W Feb 15 (046) Ahead: 70 meter downlink on station 14 Behind: 70 meter downlink on station 14 T Feb 16 (047) F Feb 17 (048) Ahead: 70 meter downlink on station 14 Behind: 70 meter downlink on station 14 S Feb 18 (049) Ahead: 70 meter downlink on station 43 Behind: 70 meter downlink on station 63 S Feb 19 (050) Ahead: 70 meter downlink on station 43 Behind: 70 meter downlink on stations 63 and 43 ------------------------------------------------------------------------------- Scheduled activities for Week 08: M Feb 20 (051) Ahead: 70 meter downlink on station 14 T Feb 21 (052) Ahead: 70 meter downlink on stations 14 and 43 Behind: 70 meter downlink on station 14 W Feb 22 (053) Behind: 70 meter downlink on station 43 T Feb 23 (054) Ahead: 70 meter downlink on station 14 Behind: 70 meter downlink on station 43 F Feb 24 (055) Behind: 70 meter downlink on station 14 S Feb 25 (056) Ahead: 70 meter downlink on station 14 S Feb 26 (057) Ahead: 70 meter downlink on stations 14 and 43 ------------------------------------------------------------------------------- Scheduled activities for Week 09: M Feb 27 (058) T Feb 28 (059) Ahead: 70 meter downlink on station 14 Behind: 70 meter downlink on station 43 W Feb 29 (060) T Mar 01 (061) Behind: 70 meter downlink on station 14 F Mar 02 (062) Ahead: 70 meter downlink on station 43 S Mar 03 (063) Ahead: 70 meter downlink on station 43 S Mar 04 (064) ------------------------------------------------------------------------------- Scheduled activities for Week 10: M Mar 05 (065) Ahead: Momentum dump, 18:00 UT T Mar 06 (066) Ahead: 70 meter downlink on station 14 W Mar 07 (067) Ahead: 70 meter downlink on station 14 T Mar 08 (068) Behind: Momentum dump, 16:00 UT F Mar 09 (069) Ahead: PIT test using station 15 Ahead: 70 meter downlink on station 14 Behind: 70 meter downlink on station 43 S Mar 10 (070) Ahead: 70 meter downlink on station 14 Behind: 70 meter downlink on station 43 S Mar 11 (071) Ahead: 70 meter downlink on station 14 ------------------------------------------------------------------------------- Scheduled activities for Week 11: M Mar 12 (072) Ahead: 70 meter downlink on station 63 Behind: 70 meter downlink on station 43 T Mar 13 (073) Behind: 70 meter downlink on station 63 W Mar 14 (074) Ahead: 70 meter downlink on station 63 T Mar 15 (075) F Mar 16 (076) Behind: 70 meter downlink on station 63 S Mar 17 (077) Ahead: 70 meter downlink on station 63 S Mar 18 (078) Ahead: 70 meter downlink on station 43 ------------------------------------------------------------------------------- Scheduled activities for Week 12: M Mar 19 (079) Behind: 70 meter downlink on station 63 T Mar 20 (080) Ahead: 70 meter downlink on station 43 Behind: 70 meter downlink on station 63 W Mar 21 (081) T Mar 22 (082) F Mar 23 (083) Ahead: 70 meter downlink on station 43 Behind: 70 meter downlink on station 43 S Mar 24 (084) Behind: 70 meter downlink on station 63 S Mar 25 (085) Ahead: 70 meter downlink on station 43 Behind: 70 meter downlink on station 63 ------------------------------------------------------------------------------- Upcoming events: 2012: * 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