STEREO Weekly Meeting Minutes for 2013-10-01 (Week 40) ANNOUNCEMENTS ------------- * The NASA MUG system used for monitoring telemetry will be upgraded on Tuesday, Oct 1, from 15-17 UT, which is outside track time. The backup date is Thursday, Oct 3, between 12-14 UT, also outside track time. INSTRUMENT and SPACECRAFT STATUS -------------------------------- * All subsystems on both spacecraft are nominal. DISCUSSION AND OPERATIONS CONSTRAINTS ------------------------------------- Week 39 (Sep 23-29) * On day 266 (Sep 23), during the DSS-34 support for Ahead, turbo decoder lock was lost briefly at 2214z. This anomaly resulted in the loss of one frame of SSR data. * On day 270 (Sep 27), during the DSS-14 support for Ahead, telemetry was delayed by 17 minutes until 1822z due to maintenance for a transmitter problem. The transmitter was brought online at 1831z and the planned commanding was conducted. The SSR pointers were repositioned prior to the outage and all data was recovered. See DR #G114297 for more information. * On day 271 (Sep 28), during the DSS-54 support for Ahead, turbo decoder lock was lost intermittently beginning at 1019z through 1021z due to adverse weather conditions. This anomaly resulted in the loss of 890 frames of SSR data. See DR #M107530 for more information. * On day 271 (Sep 28), during the DSS-55 support for Behind, turbo decoder lock was lost intermittently beginning at 1018z through 1710z due to adverse weather conditions. This anomaly resulted in the loss of 6402 frames of SSR data. See DR #M107531 for more information. * On day 272 (Sep 29), during the DSS-65 support for Behind, turbo decoder lock was lost intermittently beginning at 1113z through 1139z. This anomaly resulted in the loss of 110 frames of SSR data. See DR #N109132 for more information. * The average daily SSR playback volume during the week was 3.7 gigabits for Ahead, and 3.8 gigabits for Behind. Week 40 (Sep 30-Oct 6) * NASA MUG upgrade on Tuesday, Oct 1, with a backup on Thursday, Oct 3. See announcement above for details. * The laser gyro on Ahead will be tested on Friday, Oct 4, between 14-19 UT. The plan is to turn on the IMU and use it in the normal fashion, using the regular scripts for that purpose. * Ahead has 10 passes during the week, and overall coverage is nominal. 70 meter passes are scheduled for Tuesday, Oct 1 (D63), Wednesday, Oct 2 (D43 at 720 kbps), Friday, Oct 4 (D14 at 720 kbps), Saturday, Oct 5 (D63), and Sunday, Oct 6 (D63). The following passes will be carried out at 160 kbps, both using station 26: Monday, Sep 30, and Tuesday, Oct 1. An ESA Malargue pass is scheduled for Thursday, Oct 3. * Behind has 11 passes during the week, and overall coverage is nominal. 70 meter passes are scheduled for Monday, Sep 30 (D63 at 720 kbps), Tuesday, Oct 1 (D63 at 720 kbps), Wednesday, Oct 2 (D63), Thursday, Oct 3 (D14), Friday, Oct 4 (D14), and Saturday, Oct 5 (D63). The following passes will be carried out at 160 kbps: Monday, Sep 30 (D34), and Tuesday, Oct 1 (D26). Week 41 (Oct 7-13) * Attenuator engineering demos will be carried out with beacon telemetry from the Ahead spacecraft using station 54 on Monday, Oct 7, at 05:40 UT, and station 34 on Thursday, Oct 10, at 20:50 UT. * A test 290 degree roll of the Behind spacecraft to prepare for the Comet ISON observations is scheduled for Tuesday, Oct 8, from 16-20 UT. * Ahead has 9 passes during the week, and overall coverage is nominal. 70 meter passes are scheduled for Tuesday, Oct 8 (D63), Wednesday, Oct 9 (D14 at 720 kbps), Friday, Oct 11 (D63 at 720 kbps), and Saturday, Oct 12 (D63). The station 45 pass on Sunday, Oct 13, will be carried out at 160 kbps. * Behind has 12 passes during the week, and overall coverage is nominal. 70 meter passes are scheduled for Monday, Oct 7 (D43 at 720 kbps), Tuesday, Oct 8 (D43 at 720 kbps), Wednesday, Oct 9 (D14), Friday, Oct 11 (D63, D14), and Sunday, Oct 13 (D63). The station 26 pass on Thursday, Oct 10, will be carried out at 240 kbps. The following passes will be carried out at 160 kbps: Monday, Oct 7 (D65), and Sunday, Oct 13 (D34). Week 42 (Oct 14-20) * An attenuator engineering demo is scheduled for the Ahead spacecraft using station 45 on Monday, Oct 14, starting at 20:35 UT, and on the Behind spacecraft using station 45 on Tuesday, Oct 15, at 04:30 UT. * The 61st momentum dump on Ahead is scheduled for Wednesday, Oct 16, with ignition at 14:00 UT. * The 56th momentum dump on Behind is scheduled for Wednesday, Oct 16, with ignition at 15:00 UT. * Ahead has 8 passes during the week, and overall coverage is nominal. 70 meter passes are scheduled for Monday, Oct 14 (D63), and Saturday, Oct 19 (D63). * Behind has 12 passes during the week, and overall coverage is nominal. 70 meter passes are scheduled for Monday, Oct 14 (D14), Friday, Oct 18 (D43 at 720 kbps), and Sunday, Oct 20 (D43 at 720 kbps, D63). The following passes will be carried out at 160 kbps: Tuesday, Oct 15 (D26), Friday, Oct 18 (D26), and Saturday, Oct 19 (D25). Week 43 (Oct 21-27) * An attenuator engineering demo is scheduled for the Ahead spacecraft using station 54, on Wednesday, Oct 23, starting at 07:20 UT. * The first 180 degree rolls of the Behind spacecraft to observe Comet ISON will be carried out Thursday-Saturday, Oct 24-26, from 6-10 UT each day. * Ahead has 9 passes during the week, and overall coverage is nominal. 70 meter passes are scheduled for Monday, Oct 21 (D14), Tuesday, Oct 22 (D63), Friday, Oct 25 (D63), and Saturday, Oct 26 (D63). * Behind has 12 passes during the week, and overall coverage is nominal. 70 meter passes are scheduled for Monday, Oct 21 (D43, D63, both at 720 kbps), Tuesday, Oct 22 (D43), Saturday, Oct 26 (D63), and Sunday, Oct 27 (D63). The station 24 pass on Tuesday, Oct 24, will be carried out at 160 kbps. Week 44 (Oct 28-Nov 3) * Daylight savings time ends in the U.S. on Sunday, Nov 3, at 06:00 UT. * 180 degree rolls of the Behind spacecraft to observe Comet ISON will be carried out Monday-Wednesday, Oct 28-30, from 14-18 UT each day. * The MOM mission is scheduled for launch on Monday, Oct 28. * Ahead has 11 passes during the week, and overall coverage is nominal. 70 meter passes are scheduled for Monday, Oct 28 (D43, D63, both at 720 kbps), and Saturday, Nov 2 (D14 at 720 kbps). The station 54 pass on Friday, Nov 1, will be carried out at 160 kbps. ESA New Norcia passes are scheduled for Tuesday, Oct 29, and Wednesday, Oct 30. * Behind has 12 passes during the week, and overall coverage is nominal. A 70 meter pass is scheduled for Tuesday, Oct 29 (D43 at 720 kbsp). The following passes will be carried out at 160 kbps, both using station 26: Thursday, Oct 31, and Sunday, Nov 3. An ESA Malargue pass is scheduled for Wednesday, Oct 30, and an ESA New Norcia pass is scheduled for Saturday, Nov 2. Week 45 (Nov 4-10) * 180 degree rolls of the Behind spacecraft to observe Comet ISON will be carried out Monday-Wednesday, Nov 4-6, from 6-10 UT each day. * Ahead has 8 passes during the week, and overall coverage is nominal. 70 meter passes are scheduled for Monday, Nov 4 (D63), Tuesday, Nov 5 (D14 at 720 kbps), and Saturday, Nov 9 (D14 at 720 kbps). An ESA New Norcia pass is scheduled for Thursday, Nov 7. * Behind has 9 passes during the week, and overall coverage is nominal. A 70 meter pass is scheduled for Tuesday, Nov 5 (D63). The following passes will be carried out at 160 kbps: Monday, Nov 4 (D26), Thursday, Nov 7 (D26), and Sunday, Nov 10 (D45). Other * DSN schedules are now available for weeks 46, 47, and 48, through Comet ISON's perihelion on Nov 28. The SECCHI team asks that preliminary weekly schedules be produced for this period to assist with planning. * The question was raised about the effect of the government shutdown on STEREO mission operations. All teams report that they are still able to support operations, though non-operational matters will have to wait until the shutdown is over. COORDINATED OBSERVATIONS ------------------------------------------------------------------------------- Scheduled activities for Week 40: M Sep 30 (273) T Oct 01 (274) NASA MUG upgrade, 15-17 UT (between tracks) W Oct 02 (275) T Oct 03 (276) NASA MUG upgrade backup, 12-14 UT (between tracks) F Oct 04 (277) Ahead: IMU test, 14-19 UT S Oct 05 (278) S Oct 06 (279) ------------------------------------------------------------------------------- Scheduled activities for Week 41: M Oct 07 (280) Ahead: Attenuator engineering demo using D54, 05:40 UT T Oct 08 (281) Behind: 290 degree test roll for Comet ISON, 16-20 UT W Oct 09 (282) T Oct 10 (283) Ahead: Comet ISON enters HI2 field-of-view Ahead: Attenuator engineering demo using D34, 20:50 UT F Oct 11 (284) S Oct 12 (285) S Oct 13 (286) ------------------------------------------------------------------------------- Scheduled activities for Week 42: M Oct 14 (287) Ahead: Attenuator engineering demo using D45, 20:35 UT T Oct 15 (288) Behind: Attenuator engineering demo using D45, 04:30 UT W Oct 16 (289) Momentum dumps, Ahead: 14:00 UT, Behind: 15:00 UT T Oct 17 (290) F Oct 18 (291) S Oct 19 (292) S Oct 20 (293) Notes: * Comet ISON in HI2 field-of-view on Ahead, Oct 10-Nov 23 ------------------------------------------------------------------------------- Scheduled activities for Week 43: M Oct 21 (294) T Oct 22 (295) W Oct 23 (296) Ahead: Attenuator engineering demo using D54, 07:20 UT T Oct 24 (297) Behind: 180 degree roll to observe Comet ISON, 6-10 UT F Oct 25 (298) Behind: 180 degree roll to observe Comet ISON, 6-10 UT S Oct 26 (299) Behind: 180 degree roll to observe Comet ISON, 6-10 UT S Oct 27 (300) Notes: * Comet ISON in HI2 field-of-view on Ahead, Oct 10-Nov 23 ------------------------------------------------------------------------------- Scheduled activities for Week 44: M Oct 28 (301) Behind: 180 degree roll to observe Comet ISON, 14-18 UT T Oct 29 (302) Behind: 180 degree roll to observe Comet ISON, 14-18 UT W Oct 30 (303) Behind: 180 degree roll to observe Comet ISON, 14-18 UT T Oct 31 (304) F Nov 01 (305) S Nov 02 (306) S Nov 03 (307) Daylight savings time ends in U.S. Notes: * Comet ISON in HI2 field-of-view on Ahead, Oct 10-Nov 23 ------------------------------------------------------------------------------- Scheduled activities for Week 45: M Nov 04 (308) Behind: 180 degree roll to observe Comet ISON, 6-10 UT T Nov 05 (309) Behind: 180 degree roll to observe Comet ISON, 6-10 UT W Nov 06 (310) Behind: 180 degree roll to observe Comet ISON, 6-10 UT T Nov 07 (311) F Nov 08 (312) S Nov 09 (313) S Nov 10 (314) Notes: * Comet ISON in HI2 field-of-view on Ahead, Oct 10-Nov 23 ------------------------------------------------------------------------------- Upcoming events: 2013: * Oct 10-Nov 23 Ahead: Comet ISON in HI2 field-of-view * Oct 24-Nov 20 Behind: 180 degree rolls 3 days/week for Comet ISON * Nov 21-26 Behind: Daily 180 degree rolls for Comet ISON * Nov 21-28 Ahead: Comet ISON in HI1 field-of-view * Nov 28 Both: Perihelion passage of Comet ISON http://stereo-ssc.nascom.nasa.gov/comet_ison/ * Nov 30-Dec 7 Behind: Daily 290 degree rolls for Comet ISON * Dec 1-7 Ahead: Comet ISON in HI1 field-of-view unrolled * Dec 3-Jan 8 Ahead: 30 degree rolls 3 days/week for Comet ISON * Dec 8-Dec 20 Behind: 290 degree rolls 3 days/week for Comet ISON * Dec 12 Ahead: Mercury transit * Dec 20-Jan 8 Behind: 315 degree rolls 3 days/week for Comet ISON 2014: * Jan 20 Behind: End use of 480 kbps on 70 m DSN subnet * Apr 21 Behind: Resume use of 480 kbps on 70 m DSN subnet * Apr 29 Behind: Mercury transit * Sep 07-Nov 15 Behind: Passage of Comet Siding Spring through HI2-B * Oct 15 Behind: End use of 480 kbps on 70 m DSN subnet * Oct 17 Behind: Comet Siding Spring encounter with Mars 2015: * Jan 20 - Mar 28 (TBC) Behind: Spacecraft behind Sun * Mar DAWN - Ceres arrival * Mar 17 - Jul 14 (TBC) Ahead: Spacecraft behind Sun * Jul 2 Behind: Resume use of 480 kbps on 70 m DSN subnet * Aug 25 - Oct 19 (TBC) Behind: Spacecraft behind Sun * Sep 25 Behind: End use of 480 kbps on 70 m DSN subnet * Jul DAWN - End of nominal mission 2016: * Apr 3 Behind: Resume use of 480 kbps on 70 m DSN subnet * Jul Juno arrival at Jupiter 2017: * Jul 11 Ahead: Switch downlink rate to 160 kbps * Jul 22 Behind: Switch downlink rate to 160 kbps 2018: * Mar 5 Ahead: Mercury transit