STEREO Weekly Meeting Minutes for 2023-02-28 (Week 9) ANNOUNCEMENTS ------------- * None 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 8 (Feb 20-26) * On 051 (Feb 20), APL network engineers successfully performed the MOC annual IONET IT security scans. * On day 051 (Feb 20), during the DSS-65 support, the beginning of track was delayed 30 minutes until 1955z, due to a LNA (Low Noise Amplifier) problem. This anomaly resulted in the loss of 30 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. Later in the track, an operator error sent predicts for another mission to the wrong antenna, which caused the receiver to drop lock from 2025z to 2028z. This anomaly resulted in the loss of three minutes of real-time telemetry, commanding, tracking, and SSR data. See DRs #M115570 and #G123509 for more information. * On day 052 (Feb 21), during the DSS-35 support, turbo decoder lock was lost briefly at 0411z, and again at 0412z. This anomaly resulted in the loss of 602 frames of SSR data. See DR #C117149 for more information. * On day 054 (Feb 23), during the DSS-26 support, the beginning of track telemetry was delayed 2.5 minutes until 0432z, due to an unknown reason. This anomaly resulted in the loss of 2.5 minutes of real-time telemetry and SSR data. The MOPs team repositioned the SSR pointers during the subsequent DSS-65 track and recovered all the affected data. See DR #M115542 for more information. * On day 055 (Feb 24), the 65th SECCHI stepped calibration was executed at 1255z for aphelion in the Ahead orbit. This was the 34th SECCHI stepped calibration roll conducted without gyro use. * As of day 057 (Feb 26), all PLASTIC systems 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 6.1 Gbits during this week. Week 9 (Feb 27-Mar 5) * Ahead has ten tracks during the week, all at 720 kbps, and overall coverage is nominal. * A Project Interface Test was successfully carried out yesterday (Feb 27) in parallel with a normal track. 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 (DOY 72-82). Week 12 (Mar 20-26) * Ahead has ten tracks during the week, all at 720 kbps, and overall coverage is nominal. * The Solar Orbiter Remote Sensing Window #7 starts on Wednesday, Mar 22, and runs through Apr 1 (DOY 81-91). Week 13 (Mar 27-Apr 2) * Ahead has ten tracks during the week, all at 720 kbps, and overall coverage is nominal. Week 14 (Apr 2-9) * The Solar Orbiter Remote Sensing Window #8 starts on Tuesday, Apr 4, and runs through April 17 (DOY 94-107). Other * The STEREO planners are looking into scheduling a SECCHI high data campaign around the period when STEREO-A is close to the Sun-Earth line, similar to what was done early in the mission. So far, it looks like this may be possible. COORDINATED OBSERVATIONS ------------------------------------------------------------------------------- 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 pB campaign T Mar 16 (075) Ahead: SECCHI COR2 pB 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 ------------------------------------------------------------------------------- Scheduled activities for Week 12: M Mar 20 (079) Ahead: SECCHI COR2 Deep Field + EUVI 171A Deep Field campaign T Mar 21 (080) W Mar 22 (081) Start of Solar Orbiter Remote Sensing Window 7 T Mar 23 (082) End of Parker Solar Probe perihelion pass F Mar 24 (083) S Mar 25 (084) S Mar 26 (085) Notes: * Parker Solar Probe perihelion pass, Mar 13-23 * SECCHI COR2 Deep Field + EUVI 171A Deep Field campaign, Mar 17-20 * Solar Orbiter Remote Sensing Window 7, Mar 22-Apr 1 ------------------------------------------------------------------------------- Scheduled activities for Week 13: M Mar 27 (086) T Mar 28 (087) W Mar 29 (088) T Mar 30 (089) F Mar 31 (090) S Apr 01 (091) End of Solar Orbiter Remote Sensing Window 7 S Apr 02 (092) Notes: * Solar Orbiter Remote Sensing Window 7, Mar 22-Apr 1 ------------------------------------------------------------------------------- Scheduled activities for Week 14: M Apr 03 (093) T Apr 04 (094) Start of Solar Orbiter Remote Sensing Window 8 W Apr 05 (095) T Apr 06 (096) F Apr 07 (097) S Apr 08 (098) S Apr 09 (099) Notes: * Solar Orbiter Remote Sensing Window 8, Apr 4-17 ------------------------------------------------------------------------------- Upcoming events: 2023: * Apr 4-17 Solar Orbiter Remote Sensing Window 8 * Apr 16 Solar Orbiter Venus occultation * Apr 20-24 Solar Orbiter Remote Sensing Window 9 * Jun 17-27 Parker Solar Probe perihelion pass * Jun 27 Solar Orbiter Mercury transit * Jul 2 Behind: Closest approach to Earth * Aug 17 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 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