STEREO Weekly Meeting Minutes for 2018-11-27 (Week 48) ANNOUNCEMENTS ------------- * Debbie Knapp will be replacing David Quinn as Mission Director, after 9 years of service to STEREO. 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 47 (Nov 19-25) * On day 325 (Nov 21), during the DSS-83 (ESA Cebreros) support for Ahead, initial telemetry in the MOC was 33 minutes late at 1158z due to a problem with the SLE telemetry binds between JPL and ESA. All SSR data were recovered via an SLE offline data transfer after the track. See DR #N111012 for more information. * On day 329 (Nov 25), during the DSS-34 support for Ahead, turbo decoder lock was lost briefly at 330-0137z. This anomaly resulted in the loss of three frames of real-time telemetry and SSR data. * The average daily science data return for Ahead was 4.6 Gbits during this week. Week 48 (Nov 26-Dec 2) * The third SLE version 4 test is scheduled for Thursday, Nov 25, starting at 16:00 UT. * Chanukah starts on Dec 2, and runs though Dec 10. * Ahead has ten passes during the week, and overall coverage is nominal. There are four passes at 720 kbps, four at 360 kbps, one at 240 kbps, and one at 160 kbps. Week 49 (Dec 3-9) * The internet connection at APL will be taken down for maintenance late on Wednesday, Dec 5, between 23:00-01:30 UT. This will not affect any passes. However, there was some discussion that this activity may have been rescheduled for Monday, Dec 10, at the same time. * An SLE version 4 test with ESA is scheduled for Thursday, Dec 6. * Ahead has nine passes during the week, and overall coverage is nominal. There are four passes at 720 kbps, three at 360 kbps, and two at 240 kbps. Week 50 (Dec 10-16) * Ahead has eleven passes during the week, and overall coverage is nominal. There are seven passes at 720 kbps, one at 360 kbps, two at 240 kbps, and one at 160 kbps, including an ESA New Norcia pass on Thursday, Dec 13. Week 51 (Dec 17-23) * The 115th momentum dump on Ahead is scheduled for Wednesday, Dec 19, with ignition at 17:00 UT. This will be the 34th dump without using the gyros. This dump will be occuring during an ESA pass. * Ahead has twelve passes during the week, and overall coverage is nominal. There are four passes at 720 kbps, two at 360 kbps, two at 240 kbps, and four at 160 kbps, including two ESA Cebreros passes. Week 52 (Dec 24-30) * Tuesday, Dec 25, is Christmas. Monday, Dec 24 is also a holiday for APL. * Ahead has twelve passes during the week, and overall coverage is nominal. There are six passes at 720 kbps, two at 360 kbps, one at 240 kbps, and three at 160 kbps. Week 1 (Dec 31-Jan 6) * Tuesday, Jan 1, is the New Year's Day holiday. Monday, Dec 31 is also a holiday at APL. * On Thursday, Jan 3, the Ahead spacecraft resumes emergency rates of 120 bps upload and 633 bps download, using the LGA with a 70 meter station. * Ahead has eleven passes during the week, and overall coverage is nominal. There are eight passes at 720 kbps, two at 360 kbps, and one at 160 kbps. Week 2 (Jan 7-13) * Ahead has nine passes during the week, and overall coverage is nominal. There are six passes at 720 kbps, two at 360 kbps, and one at 240 kbps. COORDINATED OBSERVATIONS ------------------------------------------------------------------------------- Scheduled activities for Week 48: M Nov 26 (330) T Nov 27 (331) W Nov 28 (332) T Nov 29 (333) F Nov 30 (334) S Dec 01 (335) S Dec 02 (336) ------------------------------------------------------------------------------- Scheduled activities for Week 49: M Dec 03 (337) T Dec 04 (338) W Dec 05 (339) T Dec 06 (340) F Dec 07 (341) S Dec 08 (342) S Dec 09 (343) ------------------------------------------------------------------------------- Scheduled activities for Week 50: M Dec 10 (344) T Dec 11 (345) W Dec 12 (346) T Dec 13 (347) F Dec 14 (348) S Dec 15 (349) S Dec 16 (350) ------------------------------------------------------------------------------- Scheduled activities for Week 51: M Dec 17 (351) T Dec 18 (352) W Dec 19 (353) Ahead: Momentum dump, 17:00 UT T Dec 20 (354) F Dec 21 (355) S Dec 22 (356) S Dec 23 (357) ------------------------------------------------------------------------------- Scheduled activities for Week 52: M Dec 24 (358) Christmas Eve (APL holiday) T Dec 25 (359) Christmas W Dec 26 (360) T Dec 27 (361) F Dec 28 (362) S Dec 29 (363) S Dec 30 (364) ------------------------------------------------------------------------------- Scheduled activities for Week 01: M Dec 31 (365) New Year's Eve (APL holiday) T Jan 01 (001) New Year's Day W Jan 02 (002) T Jan 03 (003) F Jan 04 (004) S Jan 05 (005) S Jan 06 (006) ------------------------------------------------------------------------------- Scheduled activities for Week 02: M Jan 07 (007) T Jan 08 (008) W Jan 09 (009) T Jan 10 (010) F Jan 11 (011) S Jan 12 (012) S Jan 13 (013) ------------------------------------------------------------------------------- Upcoming events: Behind events are contingent on recovering the spacecraft. 2019: * Mar Ahead: Switch downlink rate to 240 kbps for 34 meter * Mar 31-Apr 10 Parker Solar Probe perihelion pass * Apr Behind: Switch downlink rate to 240 kbps for 34 meter * Aug 28-Sep 7 Parker Solar Probe perihelion pass * Nov 4 Ahead: Close approach of Parker Solar Probe 2020: * 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 * 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 * 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 * 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 * 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 * 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