STEREO Weekly Meeting Minutes for 2012-01-17 (Week 03) ANNOUNCEMENTS ------------- * None INSTRUMENT and SPACECRAFT STATUS -------------------------------- * All subsystems on both spacecraft are nominal. DISCUSSION AND OPERATIONS CONSTRAINTS ------------------------------------- Week 2 (Jan 9-15) * On day 009 (Jan 9), during the DSS-54 support for Ahead, turbo decoder lock was lost briefly at 0907z. This anomaly resulted in the loss of two frames of SSR data. See DR# N107866 for more information. * On day 011 (Jan 11), during the DSS-54 support for Ahead, turbo decoder lock was lost briefly at 0945z. This anomaly resulted in the loss of two frames of SSR data. See DR# N107873 for more information. * On day 012 (Jan 12), during the DSS-43 support for Ahead, real-time telemetry was lost for 12 minutes beginning at 0149z due to a DCD anomaly. The on-line DCD was reconfigured and real-time telemetry was received again at 0201z. All SSR data were recovered. See DR# N107877 for more information. * On day 012 (Jan 12), during the DSS-15 support for Ahead, real-time telemetry was lost for 12 minutes beginning at 1623z due to an incorrectly specified SOE configuration by the project. Once the correct downlink settings were configured, telemetry lock was re-established at 1635z. SSR pointers were repositioned and all SSR data were recovered. See DR# G112257 for more information. * On day 014 (Jan 14), during the DSS-34 support for Ahead, turbo decoder lock was lost intermittently at 0126z, 0203z and again at 0253z. This anomaly resulted in the loss of 11 frames of SSR data. A DR has been requested. * On day 015 (Jan 15), the SECCHI SSR1 science partition reached 100% full beginning at 1401z for 33 minutes due to a cumulative effect of ground anomaly on day 012 and insufficient track time. * On day 010 (Jan 10), the 20th SECCHI stepped calibration on Ahead, for the midpoint in the orbit, was executed at 0240z. * The 15th HGA Calibration was successfully executed on Ahead on day 012 (Jan 12), at 1913z, and on Behind on day 010 (Jan 10), at 1626z. * On day 012 (Jan 12), a flight software patch was loaded to the IMPACT HET instrument on both spacecraft to correctly report the gain state in beacon mode. * On day 010 (Jan 10), during the DSS-54 support for Behind, while reconfiguring the downlink after the HGA calibration, real-time telemetry was lost for 13 minutes beginning at 1733z due to a telemetry processor error. DCC2 was brought on-line and telemetry lock was re-established at 1746z. All SSR data were recovered. See DR# M106602 for more information. * On day 011 (Jan 11), during the DSS-65 support for Behind, turbo decoder lock was lost briefly at 1623z. This anomaly resulted in the loss of three frames of SSR data. See DR# N107880 for more information. * On day 013 (Jan 13), for the DSS-25 support for Behind, initial telemetry lock was delayed 25 minutes due to an antenna pointing anomaly. The alarm was cleared and telemetry lock was established at 2225z. SSR pointers were repositioned and all SSR data were recovered. See DR# G112259 for more information. * On day 015, during the DSS-25 support, turbo decoder lock was lost briefly at 0023z. This anomaly resulted in the loss of one frame of SSR data. See DR# N107889 for more information. * The average daily SSR playback volume was 4.3 gigabits for Ahead, and 4.0 gigabits for Behind. Week 3 (Jan 16-22) * A 2.25 hour pass for Behind is scheduled on the ESA New Norcia D32 station on Thursday, Jan 19, starting at 06:30 UT. * Ahead has 70 meter passes on Monday, Jan 16 (D63), Tuesday, Jan 17 (D43), Thursday, Jan 19 (D14, D43 at 720 kbps), and Saturday, Jan 21 (D43 twice, first at 720 kbps). There are 10 passes during the week, and overall coverage is nominal. * Behind has 70 meter passes on Monday, Jan 16, Tuesday, Jan 17, Thursday, Jan 19, Saturday, Jan 21, and Sunday, Jan 22, all using station 63. There are 15 passes during the week, and overall coverage is nominal. The station 34 pass on Monday will be carried out at 240 kbps. Week 4 (Jan 23-29) * Ahead has 70 meter passes on Wednesday, Jan 25 (D43), Friday, Jan 27 (D14), Saturday, Jan 28 (D63), and Sunday, Jan 29 (D63). There are 13 passes during the week, and overall coverage is nominal. A 6.1 hour pass is scheduled using the ESA New Norcia station D32 late Monday. * Behind has 70 meter passes on Tuesday, Jan 24 (D63), Thursday, Jan 26 (D14 at 720 kbps), and Saturday, Jan 28 (D43 at 720 kbps, D63). There are 11 passes during the week, and overall coverage is nominal. The station 15 pass on Saturday, Jan 28, will be carried out at 240 kbps. A 4.75 hour pass is scheduled using the ESA New Norcia station D32 on Thursday, starting at 4 UT. Week 5 (Jan 30-Feb 5) * Momentum dumps are scheduled on both spacecraft on Feb 1. The 44th momentum dump on Ahead is scheduled for 17:00 UT, and the 38th momentum dump on Behind is scheduled for 23:00 UT. * Ahead has 70 meter passes on Monday, Jan 30 (D63), Tuesday, Jan 31 (D63), Saturday, Feb 4 (D63 and D14), and Sunday, Feb 5 (D14). There are 13 passes during the week, and overall coverage is nominal. * Behind has 70 meter passes on Monday, Jan 30 (D14), and Thursday, Feb 2 (D63 at 720 kbps). There are 12 passes during the week, and overall coverage is nominal. The station 55 pass on Jan 31 will be carried out at 240 kbps. Week 6 (Feb 6-12) * 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 is scheduled for Tuesday, Feb 14, starting at 07:05 UT. * 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), 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 and D43), Thursday, Feb 23 (D14), Saturday, Feb 25 (D14), and Sunday, Feb 26 (D14 and D43). There are 9 passes during the week, and overall coverage is nominal. * Behind has 70 meter passes on Tuesday, Feb 21 (D14), Wednesday, Feb 22 (D43), Thursday, Feb 23 (D43), and Friday, Feb 24 (D14). There are 7 passes during the week, and overall coverage is nominal. COORDINATED OBSERVATIONS ------------------------ ------------------------------------------------------------------------------- Scheduled activities for Week 03: M Jan 16 (016) Ahead: 70 meter downlink on station 63 Behind: 70 meter downlink on station 63 T Jan 17 (017) Ahead: 70 meter downlink on station 43 Behind: 70 meter downlink on station 63 W Jan 18 (018) T Jan 19 (019) Ahead: 70 meter downlink on stations 14 and 43 Behind: 70 meter downlink on station 63 F Jan 20 (020) S Jan 21 (021) Ahead: 70 meter downlink on station 43 (twice) Behind: 70 meter downlink on station 63 S Jan 22 (022) Behind: 70 meter downlink on station 63 ------------------------------------------------------------------------------- Scheduled activities for Week 04: M Jan 23 (023) T Jan 24 (024) Behind: 70 meter downlink on station 63 W Jan 25 (025) Ahead: 70 meter downlink on station 43 T Jan 26 (026) Behind: 70 meter downlink on station 14 F Jan 27 (027) Ahead: 70 meter downlink on station 14 S Jan 28 (028) Ahead: 70 meter downlink on station 63 Behind: 70 meter downlink on stations 43 and 63 S Jan 29 (029) Ahead: 70 meter downlink on station 63 ------------------------------------------------------------------------------- Scheduled activities for Week 05: M Jan 30 (030) Ahead: 70 meter downlink on station 63 Behind: 70 meter downlink on station 14 T Jan 31 (031) Ahead: 70 meter downlink on station 63 W Feb 01 (032) Momentum dumps, Ahead: 17:00, Behind: 23:00 T Feb 02 (033) Behind: 70 meter downlink on station 63 F Feb 03 (034) S Feb 04 (035) Ahead: 70 meter downlink on stations 63 and 14 S Feb 05 (036) Ahead: 70 meter downlink on station 14 ------------------------------------------------------------------------------- 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) 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) Ahead: 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 ------------------------------------------------------------------------------- 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