STEREO Weekly Meeting Minutes for 2025-04-01 (Week 14) 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 13 (Mar 24-30) * On day 086 (Mar 27), during the DSS-14 support, turbo decoder lock was lost briefly at 17:02 UT. This anomaly resulted in the loss of 1095 frames of SSR data. The MOPs team repositioned the SSR pointers during the support and recovered all the affected data. * On day 089 (Mar 30), during the DSS-53 support, turbo decoder lock was lost briefly at 06:23 UT. This anomaly resulted in the loss of 56 frames of SSR data. The MOPs team repositioned the SSR pointers during the support and recovered all the affected data. See DR #M117811 for more information. * The average daily science data return for Ahead was 7.2 Gbits during this week. Week 14 (Mar 31 - Apr 6) * Ahead has sixteen passes during the week, all at 720 kbps, and overall coverage is nominal. * Early on Monday, March 31, during the DSS-55 support, the antenna was declared red and the track was switched to DSS-65. Also during the DSS-14 support this morning, Tuesday, April 1, the antenna was declared red. Additional details about both events will be available in next week's MOC status report. * The station 35 track originally scheduled for today, April 1, was cancelled and replaced with a station 43 track (downlink only) in order to accommodate other demands on the DSN. The track is going well and we should be okay to complete the scheduled momentum dump later today, but the MOC will continue to monitor. * The 175th momentum dump is scheduled for Tuesday, April 1, at 18:15 UT. * On Wednesday, April 2, an ESA New Norcia track is scheduled from 02:05 to 05:35 UT. * SECCHI is conducting a special observing campaign on Sunday, April 6, to observe the star Betelgeuse. Week 15 (Apr 7-13) * Ahead has fifteen passes during the week, all at 720 kbps, and overall coverage is nominal. * The Ahead spacecraft will observe a transit of Mercury on Monday, April 7. * There is a DSN network maintenance event scheduled for Tuesday, April 8 through Wednesday, April 9. * SECCHI is conducting a special observing campaign on Sunday, April 13, to observe the star Betelgeuse. Week 16 (Apr 14-20) * Ahead has twelve passes during the week, all at 720 kbps, and overall coverage is nominal. * SECCHI is conducting a special observing campaign on Sunday, April 20, to observe the star Betelgeuse. Week 17 (Apr 21-27) * Ahead has seventeen passes during the week, all at 720 kbps, and overall coverage is nominal. * The 21st Solar Orbiter remote sensing window begins Friday, April 25th. Week 18 (Apr 28 - May 4) * Ahead has sixteen passes during the week, all at 720 kbps, and overall coverage is nominal. Week 19 (May 5-11) * Ahead has fifteen passes during the week, all at 720 kbps, and overall coverage is nominal. Other COORDINATED OBSERVATIONS ------------------------------------------------------------------------------- Scheduled activities for Week 14: M Mar 31 (090) T Apr 01 (091) Ahead: Momentum dump, 18:15 UT W Apr 02 (092) T Apr 03 (093) F Apr 04 (094) S Apr 05 (095) S Apr 06 (096) Betelgeuse campaign, 12:00-14:00 Notes: * Betelgeuse campaign: - HI-2 short-exposure, high-resolution - 1 HI-1 image - no EUVI, COR1 or COR2 ------------------------------------------------------------------------------- Scheduled activities for Week 15: M Apr 07 (097) Ahead: Mercury transit T Apr 08 (098) W Apr 09 (099) T Apr 10 (100) F Apr 11 (101) S Apr 12 (102) S Apr 13 (103) Betelgeuse campaign, 12:00-14:00 Notes: * Betelgeuse campaign: - HI-2 short-exposure, high-resolution - 1 HI-1 image - no EUVI, COR1 or COR2 ------------------------------------------------------------------------------- Scheduled activities for Week 16: M Apr 14 (104) T Apr 15 (105) W Apr 16 (106) T Apr 17 (107) F Apr 18 (108) S Apr 19 (109) S Apr 20 (110) Betelgeuse campaign, 12:00-14:00 Notes: * Betelgeuse campaign: - HI-2 short-exposure, high-resolution - 1 HI-1 image - no EUVI, COR1 or COR2 ------------------------------------------------------------------------------- Scheduled activities for Week 17: M Apr 21 (111) T Apr 22 (112) W Apr 23 (113) T Apr 24 (114) F Apr 25 (115) Solar Orbiter Remote Sensing Window 21 begins S Apr 26 (116) S Apr 27 (117) Notes: * Solar Orbiter Remote Sensing Window 21, Apr 25-30 ------------------------------------------------------------------------------- Scheduled activities for Week 18: M Apr 28 (118) T Apr 29 (119) W Apr 30 (120) Solar Orbiter Remote Sensing Window 21 ends T May 01 (121) F May 02 (122) S May 03 (123) S May 04 (124) Notes: * Solar Orbiter Remote Sensing Window 21, Apr 25-30 ------------------------------------------------------------------------------- Scheduled activities for Week 19: M May 05 (125) T May 06 (126) W May 07 (127) T May 08 (128) F May 09 (129) S May 10 (130) S May 11 (131) Upcoming events: 2025: * Jun 15-24 Parker Solar Probe perihelion pass * Sep 7-12 Solar Orbiter Remote Sensing Window 22 * Sep 13-23 Solar Orbiter Remote Sensing Window 23 * Sep 12-20 Parker Solar Probe perihelion pass * Oct 1-16 Solar Orbiter Remote Sensing Window 24 * Dec 9-17 Parker Solar Probe perihelion pass 2026: * Mar 8-16 Parker Solar Probe perihelion pass * Jun 4-12 Parker Solar Probe perihelion pass * Sep 1-9 Parker Solar Probe perihelion pass * 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=NzM5MjQ2IHNoYWVsYS5pLmpvbmVzbWVjaG9sc2t5QE5BU0EuR09WIFNURVJFTy1TQ0ktT1BTID6aADWmLhmq&c=SIGNOFF ########################################################################