STEREO Weekly Meeting Minutes for 2024-04-23 (Week 17) 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 16 (Apr 15-21) * On day 106 (Apr 15), the final day of the SECCHI high downlink campaign (HDC) was completed. During the HDC, SECCHI collected high cadence COR-2 & HI-1 images for the Solar Eclipse that occurred on Apr 8. Extra DSN track coverage was planned for the HDC (Apr 1 - 15, 2024) to increase the daily science data return to 10-11 Gbits per day (normally 5-6 Gbits). * On day 108 (Apr 17), during the DSS-83 (ESA Cebreros) support, the MOC lost telemetry briefly at 0536z. This anomaly resulted in the loss of one minute of real-time telemetry and SSR data. The MOPs team repositioned the SSR pointers during the subsequent DSS-35 track and recovered all the affected data. * On day 109 (Apr 18), during the DSS-36 support, turbo decoder lock was lost briefly at 1719z. This anomaly resulted in the loss of four frames of SSR data. The MOPs team repositioned the SSR pointers during the support and recovered all the affected data. * On day 111 (Apr 20), the 70th SECCHI stepped calibration was executed at 1055z for midpoint in the Ahead orbit. This was the 39th SECCHI stepped calibration roll conducted without gyro use. * The average daily science data return for Ahead was 6.6 Gbits during this week. Week 17 (April 22-28) * Ahead has thirteen passes during the week, all at 720 kbps, and overall coverage is nominal. * The 166th momentum dump was conducted on Tuesday, April 23, with ignition at 12:30 UT. * An ESA Cebreros track is scheduled for Tuesday, April 23 from 03:40-05:40 UT. * An ESA Cebreros track is scheduled for Wednesday, April 24 from 04:45-06:45 UT. * On Friday, April 26, SECCHI will be conducting a special observing campaign targeting the star Betelgeuse from 12:00 to 14:00 UT. No spacecraft maneuver is required for this campaign. Week 18 (April 29-May 5) * Ahead has eleven passes during the week, all at 720 kbps, and overall coverage is nominal. * A five minute internet outage at APL is expected to occur on Wednesday, May 1, between 20:00-21:00 EDT. * On Friday, May 3, SECCHI will be conducting a special observing campaign targeting the star Betelgeuse from 12:00 to 14:00 UT. No spacecraft maneuver is required for this campaign. Week 19 (May 6-12) * Ahead has ten passes during the week, all at 720 kbps, and overall coverage is nominal. * On Friday, May 10, SECCHI will be conducting a special observing campaign targeting the star Betelgeuse from 12:00 to 14:00 UT. No spacecraft maneuver is required for this campaign. Week 20 (May 13-19) * Ahead has eleven passes during the week, all at 720 kbps, and overall coverage is nominal. * On Thursday, May 16 an ESA Cebreros track is scheduled from 06:05 to 08:05 UT. Week 21 (May 20-26) * Ahead has nine passes during the week, all at 720 kbps, and overall coverage is nominal. Week 22 (May 27-Jun 2) * Ahead has eleven passes during the week, all at 720 kbps, and overall coverage is nominal. * APL will be closed on Monday, May 27, for the Memorial Day holiday. * The 167th momentum dump is scheduled for Friday, May 31, with ignition at 18:30 UT. Other COORDINATED OBSERVATIONS ------------------------------------------------------------------------------- Scheduled activities for Week 17: M Apr 22 (113) T Apr 23 (114) Ahead: Momentum dump, 12:30 UT W Apr 24 (115) T Apr 25 (116) F Apr 26 (117) Betelgeuse campaign, 12:00-14:00 S Apr 27 (118) S Apr 28 (119) Notes: * Betelgeuse campaign: - HI-2 short-exposure, high-resolution - 1 HI-1 image - no EUVI, COR1 or COR2 ------------------------------------------------------------------------------- Scheduled activities for Week 18: M Apr 29 (120) T Apr 30 (121) W May 01 (122) T May 02 (123) F May 03 (124) Betelgeuse campaign, 12:00-14:00 S May 04 (125) S May 05 (126) Notes: * Betelgeuse campaign: - HI-2 short-exposure, high-resolution - 1 HI-1 image - no EUVI, COR1 or COR2 * Five minute planned power outage at APL, May 2 between 00:00-01:00 UT. ------------------------------------------------------------------------------- Scheduled activities for Week 19: M May 06 (127) T May 07 (128) W May 08 (129) T May 09 (130) F May 10 (131) Betelgeuse campaign, 12:00-14:00 S May 11 (132) S May 12 (133) Notes: * Betelgeuse campaign: - HI-2 short-exposure, high-resolution - 1 HI-1 image - no EUVI, COR1 or COR2 ------------------------------------------------------------------------------- Scheduled activities for Week 20: M May 13 (134) T May 14 (135) W May 15 (136) T May 16 (137) F May 17 (138) S May 18 (139) S May 19 (140) ------------------------------------------------------------------------------- Scheduled activities for Week 21: M May 20 (141) T May 21 (142) W May 22 (143) T May 23 (144) F May 24 (145) S May 25 (146) S May 26 (147) ------------------------------------------------------------------------------- Scheduled activities for Week 22: M May 27 (148) Memorial Day holiday T May 28 (149) W May 29 (150) T May 30 (151) F May 31 (152) Ahead: Momentum dump, 18:30 UT S Jun 01 (153) S Jun 02 (154) ------------------------------------------------------------------------------- Upcoming events: 2024: * Jun 26-Jul 5 Parker Solar Probe perihelion pass * Sep 25-30 Solar Orbiter Remote Sensing Window 16 * Sep 26-Oct 5 Parker Solar Probe perihelion pass * Oct 2-15 Solar Orbiter Remote Sensing Window 17 * Oct 17-26 Solar Orbiter Remote Sensing Window 18 * Nov 6 Parker Solar Probe Venus flyby, in HI2-A field-of-view * Nov 6 Solar Orbiter full disk mosaic * Dec 24 Solar Obiter off-point and roll for Parker Solar Probe * 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