STEREO Weekly Meeting Minutes for 2025-09-30 (Week 40) 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 39 (Sep 22-28) * On day 265 (Sep 22), during the DSS-55 support, turbo decoder lock was lost briefly at 05:15 UT. This anomaly resulted in the loss of 48 frames of SSR data. The MOPs team repositioned the SSR pointers during the support and recovered all the affected data. * On day 267 (Sep 24), the SECCHI instrument reset at 17:52:43 UT. The SECCHI team reconfigured the instrument to operational mode by 18:56 UT. This was the 86th reset of the SECCHI instrument on the Ahead observatory. * On day 267 (Sep 24), during the DSS-35 support, turbo decoder lock was lost briefly at 19:26 UT. This anomaly resulted in the loss of 15 frames of SSR data. The MOPs team repositioned the SSR pointers during the support and recovered all the affected data. * On day 268 (Sep 25), during the DSS-25 support, turbo decoder lock was lost briefly at 09:42 UT. This anomaly resulted in the loss of 51 frames of SSR data. The MOPs team repositioned the SSR pointers during the support and recovered all the affected data. * On day 270 (Sep 27), during the DSS-34 support, turbo decoder lock was lost briefly at 17:57 UT and again at 18:38 UT. This anomaly resulted in the loss of 35 frames of SSR data. The MOPs team repositioned the SSR pointers during the support and recovered all the affected data. * On day 271 (Sep 28), during the DSS-55 support, turbo decoder lock was lost briefly at 05:15 UT. This anomaly resulted in the loss of 30 frames of SSR data. The MOPs team repositioned the SSR pointers during the support and recovered all the affected data. * The average daily science data return for Ahead was 8.1 Gbits during this week. Week 40 (Sep 29 - Oct 5) * Ahead has twelve passes during the week, all at 720 kbps, and overall coverage is nominal. * The 24th Solar Orbiter remote sensing window begins Wednesday, October 1st. Week 41 (Oct 6-12) * Ahead has fourteen passes during the week, all at 720 kbps, and overall coverage is nominal. * The 180th momentum dump is scheduled for Thursday, October 9, at 20:00 UT. Week 42 (Oct 13-19) * Ahead has thirteen passes during the week, all at 720 kbps, and overall coverage is nominal. * There is a DSN network maintenance event scheduled for Monday, October 13th, from 06:30-14:30 UT. * An ESA Cebreros track is scheduled for Wednesday, October 15th, from 02:30 to 04:30 UT. * On Saturday, October 18th, the MOC will have a commercial power outage from 6am to 6pm eastern time, to facilitate power service being added to a new building being constructed nearby. During this time MOC operations will be moved to a backup location in another building. Week 43 (Oct 20-26) * Ahead has fourteen passes during the week, all at 720 kbps, and overall coverage is nominal. Week 44 (Oct 27-Nov 2) * Ahead has sixteen passes during the week, all at 720 kbps, and overall coverage is nominal. Week 45 (Nov 3-9) * Ahead has fourteen passes during the week, all at 720 kbps, and overall coverage is nominal. Other COORDINATED OBSERVATIONS ------------------------------------------------------------------------------- Scheduled activities for Week 40: M Sep 29 (272) T Sep 30 (273) W Oct 01 (274) SolO RSW 24 begins T Oct 02 (275) F Oct 03 (276) S Oct 04 (277) S Oct 05 (278) Notes: * Solar Orbiter Remote Sensing Window 24, Oct 1-16 ------------------------------------------------------------------------------- Scheduled activities for Week 41: M Oct 06 (279) T Oct 07 (280) W Oct 08 (281) T Oct 09 (282) Ahead: Momentum dump, 20:00 UT F Oct 10 (283) S Oct 11 (284) S Oct 12 (285) Notes: * Solar Orbiter Remote Sensing Window 24, Oct 1-16 ------------------------------------------------------------------------------- Scheduled activities for Week 42: M Oct 13 (286) T Oct 14 (287) W Oct 15 (288) T Oct 16 (289) SolO RSW 24 ends F Oct 17 (290) S Oct 18 (291) S Oct 19 (292) Notes: * Solar Orbiter Remote Sensing Window 24, Oct 1-16 ------------------------------------------------------------------------------- Scheduled activities for Week 43: M Oct 20 (293) T Oct 21 (294) W Oct 22 (295) T Oct 23 (296) F Oct 24 (297) S Oct 25 (298) S Oct 26 (299) ------------------------------------------------------------------------------- Scheduled activities for Week 44: M Oct 27 (300) T Oct 28 (301) W Oct 29 (302) T Oct 30 (303) F Oct 31 (304) S Nov 01 (305) S Nov 02 (306) ------------------------------------------------------------------------------- Scheduled activities for Week 45: M Nov 03 (307) T Nov 04 (308) W Nov 05 (309) T Nov 06 (310) F Nov 07 (311) S Nov 08 (312) S Nov 09 (313) ------------------------------------------------------------------------------- Upcoming events: 2025: * Dec 9-17 Parker Solar Probe perihelion pass 2026: * Feb 12-27 Solar Orbiter Remote Sensing Window 25 * Feb 28-Mar 10 Solar Orbiter Remote Sensing Window 26 * Mar 8-16 Parker Solar Probe perihelion pass * Mar 29-Apr 3 Solar Orbiter Remote Sensing Window 27 * Jun 4-12 Parker Solar Probe perihelion pass * Aug 4-14 Solar Orbiter Remote Sensing Window 28 * Aug 15-25 Solar Orbiter Remote Sensing Window 29 * Sep 1-9 Parker Solar Probe perihelion pass * Sep 11-21 Solar Orbiter Remote Sensing Window 30 * Nov 28-Dec 6 Parker Solar Probe perihelion pass * 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 ######################################################################## Access the STEREO-SCI-OPS Home Page and Archives: http://listserv.jhuapl.edu/scripts/wa.exe?A0=STEREO-SCI-OPS Unsubscribe from the STEREO-SCI-OPS List: http://listserv.jhuapl.edu/scripts/wa.exe?TICKET=NzM5NDA3IGxhbi5qaWFuQE5BU0EuR09WIFNURVJFTy1TQ0ktT1BTILQVWhe00afS&c=SIGNOFF ########################################################################