STEREO Weekly Meeting Minutes for 2025-09-09 (Week 37) ANNOUNCEMENTS ------------- * In response to a request from the instrument teams, the MOC has added an additional daily Level Zero Telemetry Processing run at 19:00 UT. All instrument teams should see the additional level-0 files in the SSC after approximately 19:30 UT. 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 36 (Sep 1-7) * On day 244 (Sep 1), during the DSS-63 support, turbo decoder lock was lost intermittently from 01:35-03:11 UT, due to a sub-reflector problem. This anomaly resulted in the loss of 7503 frames of SSR data. The MOPs team repositioned the SSR pointers during the support and recovered all the affected data. See DR #M118256 for more information. * On day 244 (Sep 1), during the DSS-55 support, turbo decoder lock was lost briefly at 07:28 UT. 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 247 (Sep 4), during the DSS-55 support, turbo decoder lock was lost intermittently from 05:57-05:58 UT. This anomaly resulted in the loss of seven frames of SSR data. The MOPs team repositioned the SSR pointers during the support and recovered all the affected data. * On day 247 (Sep 4), the 179th momentum dump was executed successfully at 19:30 UT, which imparted an estimated delta V of 0.068 m/sec. This was the 98th momentum dump conducted without gyro use. After thruster operations completed, there was a 0.9 degree of roll angle error. Fine pointing stabilized 2.6 minutes after completion of the momentum dump. * The average daily science data return for Ahead was 7.9 Gbits during this week. Week 37 (Sep 8-14) * Ahead has sixteen passes during the week, all at 720 kbps, and overall coverage is nominal. * There is a DSN network maintenance event scheduled from Monday, September 8th, at 22:00 UT to Tuesday at 06:00 UT * On Tuesday, September 9th, there will be a PLASTIC real time commanding window between 18:20 and 21:45 UT to allow them to increase MCP voltage. A backup window is scheduled for Wednesday, September 10th, from 19:10 to 23:10 UT. * Beginning Friday, September 12th, SECCHI will be conducting special observations in conjunction with the Parker Solar Probe perihelion. * The 23rd Solar Orbiter remote sensing window begins Saturday, September 13th. Week 38 (Sep 15-21) * Ahead has eighteen passes during the week, all at 720 kbps, and overall coverage is nominal. Week 39 (Sep 22-28) * Ahead has sixteen passes during the week, all at 720 kbps, and overall coverage is nominal. * The IMAP is scheduled to launch on Tuesday, September 23rd. There are several possible track deletions during the week if this launch is postponed. 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. * The DSN ECC test originally scheduled for this week has been pushed back to December 9th. Week 42 (Oct 13-19) * Ahead has twelve 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. Other COORDINATED OBSERVATIONS ------------------------------------------------------------------------------- Scheduled activities for Week 37: M Sep 08 (251) T Sep 09 (252) W Sep 10 (253) T Sep 11 (254) F Sep 12 (255) SolO RSW 22 ends S Sep 13 (256) SolO RSW 23 begins S Sep 14 (257) PSP perihelion begins Notes: * Solar Orbiter Remote Sensing Window 22, Sep 6-12 * Solar Orbiter Remote Sensing Window 23, Sep 13-23 * PSP Perihelion: -COR2 5-min pB, Sep 14 00:00 - Sep 15 24:00 (STA-PSP Quadrature) ------------------------------------------------------------------------------- Scheduled activities for Week 38: M Sep 15 (258) T Sep 16 (259) W Sep 17 (260) T Sep 18 (261) F Sep 19 (262) S Sep 20 (263) S Sep 21 (264) Notes: * Solar Orbiter Remote Sensing Window 23, Sep 13-23 * PSP Perihelion: -COR2 5-min pB, Sep 14 00:00 - Sep 15 24:00 (STA-PSP Quadrature) -HI1 20-min cadence, Sep 16 00:00 - Sep 18 24:00 (Opp w/ STA) -COR2 deep field (36 sec exp/5-min cadence), Sep 20 00:00 - Sep 23 24:00, (Q w/STA & Earth; Support for Solar Orbiter) ------------------------------------------------------------------------------- Scheduled activities for Week 39: M Sep 22 (265) T Sep 23 (266) SolO RSW 23 ends; PSP perihelion ends W Sep 24 (267) T Sep 25 (268) F Sep 26 (269) S Sep 27 (270) S Sep 28 (271) Notes: * Solar Orbiter Remote Sensing Window 23, Sep 13-23 * PSP Perihelion: -COR2 deep field (36 sec exp/5-min cadence), Sep 20 00:00 - Sep 23 24:00, (Q w/STA & Earth; Support for Solar Orbiter) ------------------------------------------------------------------------------- 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) F Oct 17 (290) S Oct 18 (291) S Oct 19 (292) Notes: ------------------------------------------------------------------------------- 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 ########################################################################