STEREO Weekly Meeting Minutes for 2024-07-02 (Week 27) 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 26 (Jun 24-30) * On 177 (Jun 25), during the DSS-53 support, the station transmitter tripped offline at 0317z, due to a hardware problem. This anomaly resulted in the loss of 11 minutes of commanding, 2-way ranging, and 3644 frames of SSR data. The MOPs team repositioned the SSR pointers during the track and recovered all the affected data. See DR #M117069 for more information. * On day 177 (Jun 25), the MOPs team successfully conducted the 16th battery discharge event at 1440z to redistribute the electrolytes within the nickel hydrogen battery cells. * As of day 182 (Jun 30), all PLASTIC systems are behaving well, except there is a moderate background count rate, which the team is continuing to monitor. * The average daily science data return for Ahead was 6.5 Gbits during this week. Week 27 (July 1-7) * Ahead has ten passes during the week, all at 720 kbps, and overall coverage is nominal. * Due to problems with the transmitter, the station 53 pass last night (Jul 1) was downlink only. There are no further station 53 passes during the week. * APL will be closed on Thursday, July 4, for the Independence Day holiday. Week 28 (July 8-14) * Ahead has nine passes during the week, all at 720 kbps, and overall coverage is nominal. * A DSN network maintenance event is scheduled from Monday, July 8th at 23:00 to Tuesday, July 9th at 03:00. * The 168th momentum dump is scheduled for Wednesday, July 10, with ignition at 18:05 UT. Week 29 (July 15-21) * Ahead has eleven passes during the week, all at 720 kbps, and overall coverage is nominal. * On Wednesday, July 17th, an ESA Cebreros track is scheduled from 08:55 to 11:00 UT. Week 30 (July 22-28) * Ahead has eleven passes during the week, all at 720 kbps, and overall coverage is nominal. Week 31 (July 29-Aug 4) * Ahead has eight passes during the week, all at 720 kbps, and overall coverage is nominal. Week 32 (Aug 5-11) * Ahead has twelve passes during the week, all at 720 kbps, and overall coverage is nominal. * A DSN maintenance event is scheduled for Monday, August 5 (day 218) between 06:30 and 15:30 UT (2:30-11:30 EDT). Other COORDINATED OBSERVATIONS ------------------------------------------------------------------------------- Scheduled activities for Week 27: M Jul 01 (183) T Jul 02 (184) W Jul 03 (185) T Jul 04 (186) Independence Day holiday, PSP Perihelion ends F Jul 05 (187) S Jul 06 (188) S Jul 07 (189) Notes: * PSP Perihelion: -COR2 15 min pB (STA-PSP quadrature), June 26-28 -COR2 15 min pB with HI1 @ 20min (STA/Earth–PSP Quadrature), June 29-July 1 -COR2 Deep Exposure doubles, July 2-4 ------------------------------------------------------------------------------- Scheduled activities for Week 28: M Jul 08 (190) PSP Perihelion ends T Jul 09 (191) W Jul 10 (192) Ahead: Momentum dump, 18:05 UT T Jul 11 (193) F Jul 12 (194) S Jul 13 (195) S Jul 14 (196) Notes: * PSP Perihelion June 26-July 8 ------------------------------------------------------------------------------- Scheduled activities for Week 29: M Jul 15 (197) T Jul 16 (198) W Jul 17 (199) T Jul 18 (200) F Jul 19 (201) S Jul 20 (202) S Jul 21 (203) ------------------------------------------------------------------------------- Scheduled activities for Week 30: M Jul 22 (204) T Jul 23 (205) W Jul 24 (206) T Jul 25 (207) F Jul 26 (208) S Jul 27 (209) S Jul 28 (210) ------------------------------------------------------------------------------- Scheduled activities for Week 31: M Jul 29 (211) T Jul 30 (212) W Jul 31 (213) T Aug 01 (214) F Aug 02 (215) S Aug 03 (216) S Aug 04 (217) ------------------------------------------------------------------------------- Scheduled activities for Week 32: M Aug 05 (218) T Aug 06 (219) W Aug 07 (220) T Aug 08 (221) F Aug 09 (222) S Aug 10 (223) S Aug 11 (224) ------------------------------------------------------------------------------- Upcoming events: 2024: * 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