STEREO Weekly Meeting Minutes for 2019-11-12 (Week 46) ANNOUNCEMENTS ------------- * Restoration of the IMPACT server at UCLA is awaiting completion of the hiring of a programmer. INSTRUMENT and SPACECRAFT STATUS -------------------------------- * Ahead is operating nominally. * 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 45 (Nov 4-10) * On day 309 (Nov 5), during the DSS-43 support for Ahead, the station was not able to acquire turbo decoder lock and provide telemetry due to a low SSNR. The antenna is orange due to a Z-axis problem with the sub-reflector (fixed at 45 degrees) with an estimated return to operations on DOY 316 (Nov 12). This anomaly resulted in the loss of 20 hours of SSR data. See DR #C114579 more information. * On day 309 (Nov 5), during the DSS-74 (ESA New Norcia) support, a SLE bluebook V4 Bind and Dataflow test was conducted successfully to verify SLE V4 Bind configurations, telemetry and command operations with ESA. The SLE telemetry bind operations were delayed by 50 minutes due to a configuration issue with the JPL SLE telemetry server. While SLE telemetry binds were successful, the MOC did not receive the simulated telemetry due to a suspected problem with the ESA PSS (portable satellite simulator). * On day 310 (Nov 6), DSS-25 conducted a successful Project Interface Test for the three links per operator (3-LPO) process. * On day 311 (Nov 7), during the DSS-43 support, the downlink rate was reduced from 720 Kbps to 240 Kbps to improve the downlink performance. The antenna is orange due to a Z-axis problem with the sub-reflector (fixed at 45 degrees) with an estimated return to operations on DOY 316 (Nov 12). * On day 312 (Nov 8), during the DSS-83 (ESA Cebreros) support a SLE bluebook V4 Bind and Dataflow test was conducted successfully with real-time spacecraft data to verify SLE V4 Bind configurations, telemetry and command operations with ESA. This was the last ESA SLE V4 Bind connectivity test and the three stations have been verified successfully. * On day 313 (Nov 9), during the DSS-24 support, the transmitter was declared red due to inability to calibrate the transmitter. This anomaly resulted in the loss of 230 minutes of command and tracking data. See DR# G120625 for more information. * On day 311 (Nov 7), due to reducing the downlink rate from 720 Kbps to 240 Kbps for the degraded DSS-43 support, the SSR science partitions filled as follows: SWAVES (Part 13) reached 100% full at 1646z for 8.7 hours. PLASTIC (Part 17) reached 95% full at 1721z for 8.2 hours. SECCHI (Part 19) reached 100% full at 1555z for 9.6 hours. * The average daily science data return for Ahead was 4.6 Gbits during this week. Week 46 (Nov 11-17) * Ahead has ten passes during the week, and overall coverage is nominal. There are seven passes at 720 kbps, two at 360 kbps, and one at 160 kbps. * There will be a return-to-service pass for station 55 on Saturday, Nov 16, 15:45-18:45 UT. There will be no instrument commanding or SSR playback during this test. Week 47 (Nov 18-24) * Ahead has eleven passes during the week, and overall coverage is nominal. There are nine passes at 720 kbps, one at 480 kbps, and one at 160 kbps. * The annual STEREO assessment review has now been moved to Thursday, Nov 21, one week before Thanksgiving, from 8:30 AM to 12 noon EST. Week 48 (Nov 25-Dec 1) * Ahead has nine passes during the week, and overall coverage is nominal. There are eight passes at 720 kbps, and one at 160 kbps. * Thursday, Nov 28, is Thanksgiving. APL will be closed Nov 28-29. Week 49 (Dec 2-8) * Ahead has eleven passes during the week, and overall coverage is nominal. There are ten passes at 720 kbps, and one at 480 kbps. Week 50 (Dec 9-15) * Ahead has twelve passes during the week, and overall coverage is nominal. An ESA New Norcia pass was added on Thursday, Dec 12. There are nine passes at 720 kbps, two at 360 kbps, and one at 240 kbps. * The 124th momentum dump on Ahead is scheduled for Tuesday, Dec 10, with ignition at 18:40 UT. Week 51 (Dec 16-22) * Ahead has fifteen passes during the week, and overall coverage is nominal. There are twelve passes at 720 kbps, two at 360 kbps, and one at 160 kbps. COORDINATED OBSERVATIONS ------------------------------------------------------------------------------- Scheduled activities for Week 46: M Nov 11 (315) T Nov 12 (316) W Nov 13 (317) T Nov 14 (318) F Nov 15 (319) S Nov 16 (320) Ahead: Return-to-service test with station 55, 15:45-18:45 UT S Nov 17 (321) ------------------------------------------------------------------------------- Scheduled activities for Week 47: M Nov 18 (322) T Nov 19 (323) W Nov 20 (324) T Nov 21 (325) STEREO subsystem review, 8:30-12 EST F Nov 22 (326) S Nov 23 (327) S Nov 24 (328) ------------------------------------------------------------------------------- Scheduled activities for Week 48: M Nov 25 (329) T Nov 26 (330) W Nov 27 (331) T Nov 28 (332) Thanksgiving F Nov 29 (333) S Nov 30 (334) S Dec 01 (335) ------------------------------------------------------------------------------- Scheduled activities for Week 49: M Dec 02 (336) T Dec 03 (337) W Dec 04 (338) T Dec 05 (339) F Dec 06 (340) S Dec 07 (341) S Dec 08 (342) ------------------------------------------------------------------------------- Scheduled activities for Week 50: M Dec 09 (343) T Dec 10 (344) Ahead: Momentum dump, 18:40 UT W Dec 11 (345) T Dec 12 (346) F Dec 13 (347) S Dec 14 (348) S Dec 15 (349) ------------------------------------------------------------------------------- Scheduled activities for Week 51: M Dec 16 (350) T Dec 17 (351) W Dec 18 (352) T Dec 19 (353) F Dec 20 (354) S Dec 21 (355) S Dec 22 (356) ------------------------------------------------------------------------------- Upcoming events: Behind events are contingent on recovering the spacecraft. 2019: * Dec 26 Parker Solar Probe Venus flyby 2020: * Jan 21-23 Ahead: COR2 deep field campaign (TBC) * Jan 24-Feb 4 Parker Solar Probe perihelion pass * May Behind: Switch downlink rate to 360 kbps for 34 meter * Jun Ahead: Switch downlink rate to 360 kbps for 34 meter * Jun Behind: Switch downlink rate to 480 kbps for 34 meter * Jun 2-13 Parker Solar Probe perihelion pass * Jul 11 Parker Solar Probe Venus flyby, in HI2-A field-of-view * Sep Ahead: Switch downlink rate to 480 kbps for 34 meter * Sep 22-Oct 2 Parker Solar Probe perihelion pass 2021: * Jan 13-23 Parker Solar Probe perihelion pass * Feb 20 Parker Solar Probe Venus flyby * Apr 25-May 4 Parker Solar Probe perihelion pass * Jul Behind: Switch downlink rate to 720 kbps for 34 meter * Aug Ahead: Switch downlink rate to 720 kbps for 34 meter * Aug 5-15 Parker Solar Probe perihelion pass * Oct 16 Parker Solar Probe Venus flyby * Nov 17-26 Parker Solar Probe perihelion pass 2022: * Feb 21-Mar 2 Parker Solar Probe perihelion pass * May 28-Jun 7 Parker Solar Probe perihelion pass * Sep 2-11 Parker Solar Probe perihelion pass * Dec 7-16 Parker Solar Probe perihelion pass 2023: * Mar 13-23 Parker Solar Probe perihelion pass * May 5 Behind: Mercury transit * Jun 17-27 Parker Solar Probe perihelion pass * Jul 17 Behind: Closest approach to Earth * Aug 13 Ahead: Closest approach to Earth * Aug 21 Parker Solar Probe Venus flyby * Sep 23-Oct 3 Parker Solar Probe perihelion pass * Dec 25-Jan 3 Parker Solar Probe perihelion pass 2024: * Mar 26-Apr 4 Parker Solar Probe perihelion pass * Jun 26-Jul 5 Parker Solar Probe perihelion pass * Sep 26-Oct 5 Parker Solar Probe perihelion pass * Nov 6 Parker Solar Probe Venus flyby, in HI2-A field-of-view * Dec 20-29 Parker Solar Probe perihelion pass 2025: * Mar 19-27 Parker Solar Probe perihelion pass * Apr 7 Ahead: Mercury transit * Jun 15-24 Parker Solar Probe perihelion pass 2026: 2027: * Feb 1 Behind: Mercury transit 2028: 2029: * Jun 30 Ahead: Mercury transit