STEREO Weekly Meeting Minutes for 2024-04-16 (Week 16) 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 15 (April 8-14) * On day 099 (Apr 8), during the DSS-36 support, one VC6 and one VC7 IDR files were not generated for 19:02:00z to 19:20:00z. This anomaly resulted in the loss of 13 minutes of SSR data. The MOPs team repositioned the SSR pointers during the subsequent DSS-55 track and recovered all the affected data. DSN is currently investigating the File Delivery Service (FDS) anomaly. See DR #N113066 for more information. * On day 100 (Apr 9), during the DSS-35 support, the VC6 IDR file was not generated for 15:57:00z to 16:27:00z. This anomaly resulted in the loss of 30 minutes of SSR data. The MOPs team repositioned the SSR pointers during the track and recovered all the affected data. On day 101, DSN identified and corrected a limit problem with the IDR file ID numbers in the File Delivery Service (FDS) software. See DR #N113067 for more information. * On day 104 (Apr 13), during the DSS-36 support, turbo decoder lock was lost briefly at 1636z. This anomaly resulted in the loss of one frame of SSR data. The MOPs team repositioned the SSR pointers during the support and recovered all the affected data. * On day 105 (Apr 14), the second week of the SECCHI high downlink campaign (HDC) was completed. During the HDC, SECCHI collected high cadence COR-2 & HI-1 images for the Solar Eclipse that occurred on Apr 8. Extra DSN track coverage was planned for the HDC (Apr 1 - 15, 2024) to increase the daily science data return to 10-11 Gbits per day (normally 5-6 Gbits). * The average daily science data return for Ahead was 8.8 Gbits during this week. Week 16 (Apr 15-21) * Ahead has eleven passes during the week, all at 720 kbps, and overall coverage is nominal. * The SECCHI high downlink campaign for the solar eclipse ended Monday, April 15. * On Wednesday, April 17 an ESA Cebreros track is scheduled from 05:25 to 06:55 UT. * Wednesday, April 17 through Thursday, April 18, SECCHI will conduct a special observing campaign to take advantage of the SolO quadrature. * On Friday, April 19, SECCHI-HI will be conducting a special observing campaign targeting the star Betelgeuse from 12:00 to 14:00 UT. No spacecraft maneuver is required for this campaign. * The 70th SECCHI stepped calibration roll is scheduled for Saturday, April 20, starting at 10:55 UT. Week 17 (April 22-28) * Ahead has thirteen passes during the week, all at 720 kbps, and overall coverage is nominal. * The 166th momentum dump is scheduled for Tuesday, April 23, with ignition at 12:30 UT. * An ESA Cebreros track is scheduled for Tuesday, April 23 from 03:40-05:40 UT. * An ESA Cebreros track is scheduled for Wednesday, April 24 from 04:45-06:45 UT. * On Friday, April 26, SECCHI will be conducting a special observing campaign targeting the star Betelgeuse from 12:00 to 14:00 UT. No spacecraft maneuver is required for this campaign. Week 18 (April 29-May 5) * Ahead has eleven passes during the week, all at 720 kbps, and overall coverage is nominal. * On Friday, May 3, SECCHI will be conducting a special observing campaign targeting the star Betelgeuse from 12:00 to 14:00 UT. No spacecraft maneuver is required for this campaign. Week 19 (May 6-12) * Ahead has ten passes during the week, all at 720 kbps, and overall coverage is nominal. * On Friday, May 10, SECCHI will be conducting a special observing campaign targeting the star Betelgeuse from 12:00 to 14:00 UT. No spacecraft maneuver is required for this campaign. Week 20 (May 13-19) * Ahead has eleven passes during the week, all at 720 kbps, and overall coverage is nominal. * On Thursday, May 16 an ESA Cebreros track is scheduled from 06:05 to 08:05 UT. Week 21 (May 20-26) * Ahead has nine passes during the week, all at 720 kbps, and overall coverage is nominal. Other COORDINATED OBSERVATIONS ------------------------------------------------------------------------------- Scheduled activities for Week 16: M Apr 15 (106) End of SECCHI high downlink campaign; End of SolO RSW 15 T Apr 16 (107) W Apr 17 (108) SolO Quadrature: COR2 15-min pB only T Apr 18 (109) SolO Quadrature: COR2 15-min pB only F Apr 19 (110) Betelgeuse campaign, 12:00-14:00 S Apr 20 (111) Ahead: SECCHI stepped calibration roll, 10:55 UT S Apr 21 (112) Notes: * Solar Orbiter Remote Sensing Window 15, April 12-15 * SECCHI High-downlink Campaign for solar eclipse: April 1-15 - COR2 2.5dd-min + HI1 20-min, April 1-6 - COR2 pB 5-min program, April 7-9 * Betelgeuse campaign: - HI-2 short-exposure, high-resolution - 1 HI-1 image - no EUVI, COR1 or COR2 ------------------------------------------------------------------------------- Scheduled activities for Week 17: M Apr 22 (113) T Apr 23 (114) Ahead: Momentum dump, 12:30 UT W Apr 24 (115) T Apr 25 (116) F Apr 26 (117) Betelgeuse campaign, 12:00-14:00 S Apr 27 (118) S Apr 28 (119) Notes: * Betelgeuse campaign: - HI-2 short-exposure, high-resolution - 1 HI-1 image - no EUVI, COR1 or COR2 ------------------------------------------------------------------------------- Scheduled activities for Week 18: M Apr 29 (120) T Apr 30 (121) W May 01 (122) T May 02 (123) F May 03 (124) Betelgeuse campaign, 12:00-14:00 S May 04 (125) S May 05 (126) Notes: * Betelgeuse campaign: - HI-2 short-exposure, high-resolution - 1 HI-1 image - no EUVI, COR1 or COR2 ------------------------------------------------------------------------------- Scheduled activities for Week 19: M May 06 (127) T May 07 (128) W May 08 (129) T May 09 (130) F May 10 (131) Betelgeuse campaign, 12:00-14:00 S May 11 (132) S May 12 (133) Notes: * Betelgeuse campaign: - HI-2 short-exposure, high-resolution - 1 HI-1 image - no EUVI, COR1 or COR2 ------------------------------------------------------------------------------- Scheduled activities for Week 20: M May 13 (134) T May 14 (135) W May 15 (136) T May 16 (137) F May 17 (138) S May 18 (139) S May 19 (140) ------------------------------------------------------------------------------- Scheduled activities for Week 21: M May 20 (141) T May 21 (142) W May 22 (143) T May 23 (144) F May 24 (145) S May 25 (146) S May 26 (147) ------------------------------------------------------------------------------- Upcoming events: 2024: * Jun 26-Jul 5 Parker Solar Probe perihelion pass * Sep 25-30 Solar Orbiter Remote Sensing Window 16 * Sep 26-Oct 5 Parker Solar Probe perihelion pass * Oct 2-15 Solar Orbiter Remote Sensing Window 17 * Oct 17-26 Solar Orbiter Remote Sensing Window 18 * Nov 6 Parker Solar Probe Venus flyby, in HI2-A field-of-view * Nov 6 Solar Orbiter full disk mosaic * Dec 24 Solar Obiter off-point and roll for Parker Solar Probe * Dec 20-29 Parker Solar Probe perihelion pass 2025: * Feb 18 Solar Orbiter Venus flyby * Mar 19-27 Parker Solar Probe perihelion pass * Apr 7 Ahead: Mercury transit * Jun 15-24 Parker Solar Probe perihelion pass 2026: * 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