STEREO Weekly Meeting Minutes for 2026-02-03 (Week 6) 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 5 (Jan 26 - Feb 1) * On day 027 (Jan 27), during the DSS-54 support, turbo decoder lock was lost briefly at 05:02 UT. This anomaly resulted in the loss of two frames of SSR data. The MOPs team repositioned the SSR pointers during the support and recovered all the affected data. * On day 028 (Jan 28), during the DSS-65 support, the turbo decoder as unable to lock from 05:05 to 07:30 UT, due to a hardware problem (HEMT-X) and heavy rain. This anomaly resulted in the loss of 2.3 hours of real-time telemetry, command, tracking, and SSR data. The station operator was able to provide telemetry via DSS-54 for minutes from 05:47 to 06:20 UT. The MOPs team repositioned the SSR pointers during the subsequent DSS-24 support and recovered all the affected data, except for the loss of ~14.2 hours of SECCHI data for January 27th from 09:50 to 13:27 UT and January 27th 17:50 thru January 28th at 04:28 UT. See DR #M118795 for more information. * On day 029 (Jan 29), DSN conducted a Mission Network Maintenance from 07:30 through 15:30 UT. After the maintenance, the MOPs team verified the SLE telemetry and command connectivity with DSN. * On day 031 (Jan 31), during the DSS-34 support, turbo decoder lock was lost briefly at 18:28 UT. This anomaly resulted in the loss of three 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 7.3 Gbits during this week. Week 6 (Feb 2-8) * Ahead has fifteen passes during the week, all at 720 kbps, and overall coverage is nominal. * The 78th SECCHI stepped calibration roll was conducted successfully on Monday, February 2nd, at 07:35 UT. * The Artemis II launch opportunity window scheduled to open on Friday, February 6th, has been cancelled. This has freed up more time at DSN, which may result in schedule changes to week 7. Week 7 (Feb 9-15) * Ahead has twelve passes during the week, all at 720 kbps, and overall coverage is nominal. * The 183rd momentum dump is scheduled for Wednesday, February 11th, at 14:30 UT. * The 25th Solar Orbiter remote sensing window begins Thursday, February 12th. Week 8 (Feb 16-22) * Ahead has fourteen passes during the week, all at 720 kbps, and overall coverage is nominal. * The ESA New Norcia track originally planned for this week was cancelled due to schedule changes after the Artemis II launch was postponed. * There is a DSN network maintenance event scheduled for Tuesday, February 17th, from 16:00-00:00 February 18th. Week 9 (Feb 23 - Mar 1) * Ahead has thirteen passes during the week, all at 720 kbps, and overall coverage is nominal. * The 26th Solar Orbiter remote sensing window begins Saturday, February 28th. Week 10 (Mar 2-8) * Ahead has thirteen passes during the week, all at 720 kbps, and overall coverage is nominal. * Beginning Sunday, March 8th, SECCHI will be conducting special observations in conjunction with the Parker Solar Probe perihelion. * Daylight Savings Time begins Sunday, March 8th. Week 11 (Mar 9-15) * Ahead has fifteen passes during the week, thirteen at 720 kbps, and two at 460 kbps. Overall coverage is nominal. * There will be an ESA New Norcia pass on Tuesday, March 10, from 18:20-21:25 UT. * There will be an ESA Malargue pass on Wednesday, March 11, from 12:30-13:45 UT. Other COORDINATED OBSERVATIONS ------------------------------------------------------------------------------- Scheduled activities for Week 06: M Feb 02 (033) Ahead: SECCHI stepped calibration roll, 07:35 T Feb 03 (034) W Feb 04 (035) T Feb 05 (036) F Feb 06 (037) S Feb 07 (038) S Feb 08 (039) ------------------------------------------------------------------------------- Scheduled activities for Week 07: M Feb 09 (040) T Feb 10 (041) W Feb 11 (042) Ahead: Momentum dump, 14:30 UT T Feb 12 (043) SolO RSW 25 begins F Feb 13 (044) S Feb 14 (045) S Feb 15 (046) Notes: * Solar Orbiter Remote Sensing Window 25, Feb 12-27 ------------------------------------------------------------------------------- Scheduled activities for Week 08: M Feb 16 (047) T Feb 17 (048) W Feb 18 (049) T Feb 19 (050) F Feb 20 (051) S Feb 21 (052) S Feb 22 (053) Notes: * Solar Orbiter Remote Sensing Window 25, Feb 12-27 ------------------------------------------------------------------------------- Scheduled activities for Week 09: M Feb 23 (054) T Feb 24 (055) W Feb 25 (056) T Feb 26 (057) F Feb 27 (058) SolO RSW 25 ends S Feb 28 (059) SolO RSW 26 begins S Mar 01 (060) Notes: * Solar Orbiter Remote Sensing Window 25, Feb 12-27 * Solar Orbiter Remote Sensing Window 26, Feb 28 - Mar 10 ------------------------------------------------------------------------------- Scheduled activities for Week 10: M Mar 02 (061) T Mar 03 (062) W Mar 04 (063) T Mar 05 (064) F Mar 06 (065) Artemis II launch window begins S Mar 07 (066) S Mar 08 (067) Start of PSP perihelion pass, Daylight Savings Time begins Notes: * Solar Orbiter Remote Sensing Window 26, Feb 28 - Mar 10 * Artemis II launch window, Mar 6-11 * Parker Solar Probe Perihelion pass, Mar 8-16 ------------------------------------------------------------------------------- Scheduled activities for Week 11: M Mar 09 (068) T Mar 10 (069) Solar Orbiter Remote Sensing Window 26 ends W Mar 11 (070) Artemis II launch window ends T Mar 12 (071) F Mar 13 (072) S Mar 14 (073) S Mar 15 (074) Notes: * Solar Orbiter Remote Sensing Window 26, Feb 28 - Mar 10 * Artemis II launch window, Mar 6-11 * Parker Solar Probe Perihelion pass, Mar 8-16 ------------------------------------------------------------------------------- Upcoming events: 2026: * Mar 29-Apr 3 Solar Orbiter Remote Sensing Window 27 * Apr 1-6 Artemis II launch window * 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=NzM5NjAzIHNoYWVsYS5pLmpvbmVzbWVjaG9sc2t5QE5BU0EuR09WIFNURVJFTy1TQ0ktT1BTIGvQ3MCEIhMC&c=SIGNOFF ########################################################################