STEREO Weekly Meeting Minutes for 2023-02-07 (Week 6) ANNOUNCEMENTS ------------- * The next STEREO Annual Assessment is planned for Thursday, Feb 16, 2023, from 8:30-12:00 EST. The instrument teams are invited to present their instrument status. The meeting will be done via Zoom, not Conference Manager as previously announced. Meeting invitations have been sent out. INSTRUMENT and SPACECRAFT STATUS -------------------------------- * Ahead is operating nominally. PLASTIC is in operational mode, but with a moderately higher than normal background rate. * Four years after the initial loss of communications anomaly with the Behind observatory, NASA has directed to cease periodic recovery operations with the last support on October 17, 2018. DISCUSSION AND OPERATIONS CONSTRAINTS ------------------------------------- Week 5 (Jan 30-Feb 5) * On day 031 (Jan 031), the MOC conducted L3VPN SLE Portal Telemetry Bind testing with JPL from 1600z to 1730z. The MOC successfully bound with all eight portals (slegp 1-4 and testslegp 1-4) from the three MOC workstations. The MOC also conducted a track at 2225z with DSS-25, and received telemetry on the three MOC workstations. The MOC will be using the L3VPN network for telemetry and command (CMD switched in 2021) going forward. * On day 032 (Feb 1), DSN conducted a Mission Network maintenance from 1230z through 2130z to replace networking equipment. After the maintenance, DSN experienced intermittent network connectivity issues with multiple projects. JPL Network Engineering resolved the issue by 2300z with a partial roll back of the routing protocol migration from the MNET Palo Alto to MNET Juniper Core. * On day 032 (Feb 1), during the DSS-55 support for Ahead, the beginning of track was delayed 32 minutes until 2202z, due to an uplink interface failure that was caused by the DSN scheduled maintenance on the WAN routers and core switches. This anomaly resulted in the loss of 32 minutes of real-time telemetry, commanding, tracking, and SSR data. The MOPs team repositioned the SSR pointers during the support and recovered all the affected data. See DRs #M115491 and #N112502 for more information. * The DSN plans to try again, possibly using a backup string for testing. * On day 033 (Feb 2), during the DSS-34 support for Ahead, turbo decoder lock was lost briefly at 1010z and 1030z. This anomaly resulted in the loss of eleven frames of SSR data. Also, ranging dropped lock unexpectedly at 1132z to 1139z. See DR #C117093 for more information. * On day 034 (Feb 3), during the DSS-54 support for Ahead, turbo decoder lock was lost briefly at 1735z. This anomaly resulted in the loss of 22 frames of SSR data. The MOPs team repositioned the SSR pointers during the support and recovered all the affected data. * On day 035 (Feb 4), during the DSS-56 support for Ahead, the transmitter was declared red, due to a hardware problem. This anomaly resulted in the loss of 3.9 hours of real-time commanding and 2-way tracking data. See DR #G115515 for more information. * As of day 036 (Feb 5), all PLASTIC systems on Ahead are behaving well, except there is a moderate background count rate, which the team is continuing to monitor. * The average daily science data return for Ahead was 6.3 Gbits during this week. Week 6 (Feb 6-12) * Ahead has nine tracks during the week, all at 720 kbps, and overall coverage is nominal. * The maintenance on the MOC network originally scheduled for Monday, Feb 6, has been moved to Feb 13. Week 7 (Feb 13-19) * Ahead has eight tracks during the week, all at 720 kbps,and overall coverage is nominal. * The aborted Project Interface Test on Jan 24 will now be carried out with station 36 on Monday, Feb 13, between 01:10-03:05 UT. There will be no instrument commanding or SSR playback during this test. * Maintenance on the MOC network will be performed between 13-14 UT (8-9 AM local) on Monday, Feb 13. * The next STEREO Annual Assessment is planned for Thursday, Feb 16, 2023, from 8:30-12:00 EST. * The 13th battery discharge maintenance event is scheduled for Thursday, Feb.16, starting at 14:00 UT. Week 8 (Feb 20-26) * Ahead has ten tracks during the week, all at 720 kbps, and overall coverage is nominal. * Maintenance on the MOC network will be performed between 13-15 UT on Monday, Feb 20. * The 65th SECCHI stepped calibration roll is scheduled for Friday, Feb 24, starting at 12:55 UT. Note that this is five minutes earlier than originally announced. Week 9 (Feb 27-Mar 5) * Ahead has ten tracks during the week, all at 720 kbps, and overall coverage is nominal. Week 10 (Mar 6-12) * Ahead has nine tracks during the week, all at 720 kbps, and overall coverage is nominal. * The 154th momentum dump on Ahead is scheduled for Monday, Mar 6, with ignition at 22:00 UT. * Daylight Savings Time in the US begins on Sunday, Mar 12. Week 11 (Mar 13-19) * Ahead has nine tracks during the week, all at 720 kbps, and overall coverage is nominal. * The Parker Solar Probe perihelion pass starts on Mar 13, and runs through Mar 23. COORDINATED OBSERVATIONS ------------------------------------------------------------------------------- Scheduled activities for Week 06: M Feb 06 (037) T Feb 07 (038) W Feb 08 (039) T Feb 09 (040) F Feb 10 (041) S Feb 11 (042) S Feb 12 (043) ------------------------------------------------------------------------------- Scheduled activities for Week 07: M Feb 13 (044) Ahead: Project Interface Test with station 36, 01:10-03:05 UT MOC network maintenance, 13-14 UT T Feb 14 (045) W Feb 15 (046) T Feb 16 (047) Ahead: Battery maintenance, 14:00 UT F Feb 17 (048) S Feb 18 (049) S Feb 19 (050) Notes: * STEREO Annual Assessment, Thursday, Feb 16, 8:30-12:00 EST, APL ------------------------------------------------------------------------------- Scheduled activities for Week 08: M Feb 20 (051) MOC network maintenance, 13-15 UT T Feb 21 (052) W Feb 22 (053) T Feb 23 (054) F Feb 24 (055) Ahead: SECCHI stepped calibration roll, 13 UT S Feb 25 (056) S Feb 26 (057) ------------------------------------------------------------------------------- Scheduled activities for Week 09: M Feb 27 (058) T Feb 28 (059) W Mar 01 (060) T Mar 02 (061) F Mar 03 (062) S Mar 04 (063) S Mar 05 (064) ------------------------------------------------------------------------------- Scheduled activities for Week 10: M Mar 06 (065) Ahead: Momentum dump, 22:00 UT T Mar 07 (066) W Mar 08 (067) T Mar 09 (068) F Mar 10 (069) S Mar 11 (070) S Mar 12 (071) Daylight Savings Time begins in US ------------------------------------------------------------------------------- Scheduled activities for Week 11: M Mar 13 (072) Beginning of Parker Solar Probe perihelion pass T Mar 14 (073) W Mar 15 (074) Ahead: SECCHI COR2 campaign T Mar 16 (075) Ahead: SECCHI COR2 campaign F Mar 17 (076) Ahead: SECCHI COR2 Deep Field + EUVI 171A Deep Field campaign S Mar 18 (077) Ahead: SECCHI COR2 Deep Field + EUVI 171A Deep Field campaign S Mar 19 (078) Ahead: SECCHI COR2 Deep Field + EUVI 171A Deep Field campaign Notes: * Parker Solar Probe perihelion pass, Mar 13-23 * SECCHI COR2 Deep Field + EUVI 171A Deep Field campaign, Mar 17-20 ------------------------------------------------------------------------------- Upcoming events: Behind events are contingent on recovering the spacecraft. 2023: * Mar 22-Apr 1 Solar Orbiter Remote Sensing Window 7 * Apr 4-17 Solar Orbiter Remote Sensing Window 8 * Apr 16 Solar Orbiter Venus occultation * Apr 20-24 Solar Orbiter Remote Sensing Window 9 * May 5 Behind: Mercury transit * Jun 17-27 Parker Solar Probe perihelion pass * Jun 27 Solar Orbiter Mercury transit * Jul 17 Behind: Closest approach to Earth * Aug 13 Ahead: Closest approach to Earth * Aug 21 Parker Solar Probe Venus flyby * Sep 23-Oct 3 Parker Solar Probe perihelion pass * Oct 1-10 Solar Orbiter Remote Sensing Window 10 * Oct 12-21 Solar Orbiter Remote Sensing Window 11 * Oct 23-Nov 1 Solar Orbiter Remote Sensing Window 12 * Dec 25-Jan 3 Parker Solar Probe perihelion pass 2024: * Mar 26-Apr 4 Parker Solar Probe perihelion pass * Jun 26-Jul 5 Parker Solar Probe perihelion pass * Sep 26-Oct 5 Parker Solar Probe perihelion pass * Nov 6 Parker Solar Probe Venus flyby, in HI2-A field-of-view * Dec 20-29 Parker Solar Probe perihelion pass 2025: * Feb 18 Solar Orbiter Venus flyby * Mar 19-27 Parker Solar Probe perihelion pass * Apr 7 Ahead: Mercury transit * Jun 15-24 Parker Solar Probe perihelion pass 2026: * Dec 24 Solar Orbiter Venus flyby 2027: * Feb 1 Behind: Mercury transit 2028: * Mar 18 Solar Orbiter Venus flyby 2029: * Jun 10 Solar Orbiter Venus flyby * Jun 30 Ahead: Mercury transit 2030: * Sep 3 Solar Orbiter Venus flyby