STEREO Weekly Meeting Minutes for 2026-02-24 (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 16-22) * On day 047 (Feb 16), during the DSS-65 support, telemetry was lost three minutes before end of track at 08:41 UT, due to a hardware problem. This anomaly resulted in the loss of three minutes of real-time data. All the affected data was recovered during the subsequent DSS-34 track. See DR #M118874 for more information. * On day 048 (Feb 17), during the DSS-24 support, the antenna was declared red, due to a hardware problem caused by high winds. This anomaly resulted in the loss of 3.8 hours of real-time telemetry, commanding, tracking, and SSR data. Another track was scheduled for DOY 048 on DSS-54 to prevent data loss. See DR #G125871 for more information. * On day 048 (Feb 17), DSN conducted a Mission Network Maintenance from 16:00 through 00:00 UT on Feb 18. After the maintenance, the MOPs team verified the SLE telemetry and command connectivity with DSN. * On day 050 (Feb 19), during the DSS-36 support, turbo decoder lock was lost briefly at 18:28 UT. This anomaly resulted in the loss of 57 frames of SSR data. The MOPs team repositioned the SSR pointers during the support and recovered all the affected data. See DR #C119052 for more information. * On day 052 (Feb 21), during the DSS-65 support, turbo decoder lock was lost briefly at 07:52 UT. This anomaly resulted in the loss of 99 frames of SSR data. The MOPs team repositioned the SSR pointers during the support and recovered all the affected data. See DR #M118893 for more information. * On day 053 (Feb 22), during the DSS-65 support, turbo decoder lock was lost briefly at 06:14 UT, due to weather. This anomaly resulted in the loss of 82 frames of SSR data. The MOPs team repositioned the SSR pointers during the support and recovered all the affected data. See DR #M118898 for more information. * The average daily science data return for Ahead was 6.9 Gbits during this week. Week 9 (Feb 23 - Mar 1) * Ahead has thirteen passes during the week, all at 720 kbps, and overall coverage is nominal. * There will be a NASCOM IONET network maintenance today, Tuesday, February 24th, from 18:15-21:00 UT. * 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. * On Tuesday, March 3rd, a MOC IONET security scan is scheduled from 13:00 to 15:00 UT. * The Artemis II launch window originally scheduled from March 6-11 was cancelled. * Daylight Savings Time begins Sunday, March 8th. * Beginning Sunday, March 8th, SECCHI will be conducting special observations in conjunction with the Parker Solar Probe perihelion. Week 11 (Mar 9-15) * Ahead has fourteen passes during the week, eleven at 720 kbps, and three at 480 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. * There will be an ESA New Norcia pass on Saturday, March 14, from 18:45-21:45 UT. * See note below under "Other" regarding SDAC and SPDF moves during week 11. Week 12 (Mar 16-22) * Ahead has eleven passes during the week, all at 720 kbps, and overall coverage is nominal. * There is a DSN network maintenance event scheduled for Tuesday, March 17th, from 21:00-05:00 March 18th. Week 13 (Mar 23-29) * Ahead has fourteen passes during the week, all at 480 kbps and overall coverage is nominal. * There will be an ESA New Norcia pass on Monday, March 23rd, from 18:45-20:45 UT. * The 184th momentum dump is scheduled for Tuesday, March 24th, at 14:00 UT. * An ESA Malargue track is scheduled for Wednesday, March 25th, from 07:45 to 08:50 UT. * The 27th Solar Orbiter remote sensing window begins Sunday, March 29th. Week 14 (Mar 30 - Apr 5) * Ahead has thirteen passes during the week, four at 720 kbps, and nine at 480 kbps. Overall coverage is nominal. * The Artemis II launch opportunity window opens on Wednesday, April 1st, and ends Friday, April 10th. Other * The SPDF and SDAC have been told they will be moving to their new building during the week of March 9th. Service from those facilities will be disrupted during the move. The exact date of the move is unknown, though SPDF is advocating for a move as early in the week as possible in order to minimize service disruption. * Dan Wilson has received Annual Health Assessment slides from the APL engineers, and will post to the final collection to the STEREO data server next Monday. Anyone who still has items to contribute, please send them along to him by then. COORDINATED OBSERVATIONS ------------------------------------------------------------------------------- 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 - HI1 20min + COR2 15-min pB, Mar 3-12 (tentative, as downlink permits) ------------------------------------------------------------------------------- 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 - HI1 20min + COR2 15-min pB, Mar 3-12 (tentative, as downlink permits) - COR2 Deep Field (36-sec, 5-min), Mar 13-15 (as downlink permits) ------------------------------------------------------------------------------- Scheduled activities for Week 12: M Mar 16 (075) T Mar 17 (076) W Mar 18 (077) T Mar 19 (078) F Mar 20 (079) S Mar 21 (080) S Mar 22 (081) Notes: * Parker Solar Probe Perihelion pass, Mar 8-16 ------------------------------------------------------------------------------- Scheduled activities for Week 13: M Mar 23 (082) T Mar 24 (083) Ahead: Momentum dump, 14:00 UT W Mar 25 (084) T Mar 26 (085) F Mar 27 (086) S Mar 28 (087) S Mar 29 (088) Solar Orbiter Remote Sensing Window 27 begins Notes: * Solar Orbiter Remote Sensing Window 27, Mar 29-Apr 3 ------------------------------------------------------------------------------- Scheduled activities for Week 14: M Mar 30 (089) T Mar 31 (090) W Apr 01 (091) Artemis II launch window begins T Apr 02 (092) F Apr 03 (093) S Apr 04 (094) S Apr 05 (095) Notes: * Solar Orbiter Remote Sensing Window 27, Mar 29-Apr 3 * Artemis II launch window, Apr 1-10 ------------------------------------------------------------------------------- Upcoming events: 2026: * 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 ########################################################################