STEREO Weekly Meeting Minutes for 2012-07-17 (Week 29) ANNOUNCEMENTS ------------- * None. INSTRUMENT and SPACECRAFT STATUS -------------------------------- * All subsystems on both spacecraft are nominal. DISCUSSION AND OPERATIONS CONSTRAINTS ------------------------------------- Week 28 (Jul 9-15) * On day 192 (Jul 10), during the DSS-65 support, turbo decoder lock was lost intermittently beginning at 0405z through 0701z. This anomaly resulted in the loss of 198 frames of SSR data. See DR# N108241 for more information * On day 193 (Jul 11), during the DSS-54 support, turbo decoder lock was lost briefly at 0442z. This anomaly resulted in the loss of 13 frames of SSR data. See DR# N108244 for more information. * On day 193 (Jul 11), the SWAVES science partition reached 100% full starting at 1745z for 18 minutes. The primary cause for the overwriting of science data was due to the unplanned downtime of DSS-63 * On day 194 (Jul 12), the 16th HGA Calibration was successfully executed at 1256z. * On day 194 (Jul 12) the IMPACT SEP GSE laptop was replaced and tested in the MOC. The threshold value for the IMPACT HET instrument was also adjusted. * On day 195 (Jul 13), the 48th momentum dump was successfully executed at 1630Z, which imparted a delta V of 0.1039 m/sec. * On day 196 (Jul 14), during the DSS-15 support, turbo decoder lock was lost briefly at 1404z. This anomaly resulted in the loss of one frame of SSR data. A DR has been requested. * On day 197 (Jul 15), during the DSS-15 support, turbo decoder lock was lost for 16 seconds beginning at 1748:05z due to low received signal level. This anomaly resulted in the loss of several minutes of SSR data. A DR has been requested. * On day 193 (Jul 11), during the DSS-54 support, real-time telemetry was lost beginning at 1107z due to the station telemetry processor losing connectivity during a DCD failover. The telemetry processor was rebooted and real-time telemetry was restored at 1114z. This anomaly resulted in the loss of 20 minutes of SSR data for each instrument. See DR# M106839 for more information. * On day 193 (Jul 11), the SWAVES science partition reached 100% full starting at the following times: 0913z for 30 minutes 2225z for 1.2 hours The primary cause for the overwriting of science data was due to the unplanned downtime of DSS-63. * On day 193 (Jul 11), the 16th HGA Calibration was successfully executed at 1500z. * On day 194 (Jul 12) the IMPACT SEP GSE laptop was replaced and tested in the MOC. The threshold value for the IMPACT HET instrument was also adjusted. * On day 194 (Jul 12), during the DSS-65 support, turbo decoder lock was lost briefly at 0910z and again at 1122z. This anomaly resulted in the loss of four frames of SSR data. See DR# N108249 for more information. * On day 195 (Jul 13), during the DSS-65 support, turbo decoder lock was lost briefly at 0957z and again at 1145z. This anomaly resulted in the loss of 16 frames of SSR data. See DR# N108250 for more information. * On day 196 (Jul 14), the SWAVES science partition reached 100% full starting at the following times: 1435z for 3.6 hours 2039z for 47 minutes The primary cause for the overwriting of science data was due to the unplanned downtime of DSS-63. * The average daily SSR playback volume during the week was 4.9 gigabits for Ahead, and 4.1 gigabits for Behind. Week 29 (Jul 16-22) * The 43rd momentum dump on Behind is scheduled for Tuesday, Jul 17, starting at 19:30 UT. * Ahead has 70 meter tracks on Thursday, Jul 19 (D14), and Friday, Jul 20 (D43). There are 15 tracks during the week, and overall coverage is nominal. The station 15 track on Saturday, Jul 21 will be carried out at 240 kbps. ESA New Norcia passes are scheduled for Monday, Jul 16, Tuesday, Jul 17, Wednesday, Jul 18, and Saturday, Jul 21, and an ESA Cebreros pass is scheduled for Tuesday, Jul 17. * Behind has 70 meter tracks on Tuesday, Jul 17 (D14), Wednesday, Jul 18 (D14 at 720 kbps), Friday, Jul 20 (D14), Saturday, Jul 21 (D14), and Sunday, Jul 22 (D14). There are 14 passes during the week, and overall coverage is short 11.3 hours between days 197-198 (Jul 15-16), and 2 hours on Saturday, Jul 21. There's only a single ESA pass on Monday, Jul 16, with a duration of one hour, so the priority will be to get a command up during that pass. The station 55 pass on Thursday, Jul 19 will be carried out at 240 kbps. ESA Cebreros passes are scheduled for Monday, Jul 16 (1 hour), Thursday, Jul 19, and Sunday, Jul 22, and ESA New Norcia passes are scheduled for Wednesday, Jul 18, Thursday, Jul 19, Friday, Jul 20, and Sunday, Jul 22. The in situ instruments may be able to mostly ride through these data shortages in weeks 28-29, but SECCHI will definitly need to cut back on their observing schedule. Week 30 (Jul 23-29) * Ahead has 70 meter tracks on Monday, Jul 23 (D14), Tuesday, Jul 24 (D14), Wednesday, Jul 25 (D14), Thursday, Jul 26 (D14), Friday, Jul 27 (D63), and Sunday, Jul 29 (D63 at 720 kbps). There are 12 tracks during the week, and overall coverage is nominal. * Behind has 70 meter tracks on Monday, Jul 23, Tuesday, Jul 24, and Saturday, Jul 28, all using station 14. There are 14 passes during the week, and overall coverage is nominal. The station 24 track on Thursday, Jul 26 will be carried out at 240 kbps. ESA New Norcia passes are scheduled for Friday and Saturday, Jul 27-28. * 70 meter station D63 is expected to be back in operation during the week. The first scheduled use of this station is Friday, Jul 27, for Ahead. Week 31 (Jul 30-Aug 5) * Ahead has 70 meter tracks on Monday, Jul 30 (D63, D14 at 720 kbps), Tuesday, Jul 31 (D63, D14), Friday, Aug 3 (D63 at 720 kbps), Saturday, Aug 4 (D14 at 720 kbsp), and Sunday, Aug 5 (D14 at 720 kbps). There are 11 passes during the week, and overall coverage is nominal. The station 15 pass on Wednesday, Aug 1 will be carried out at 240 kbps. * Behind has 70 meter tracks on Monday, Jul 30 (D63 at 720 kbsp), Tuesday, Jul 31 (D63), and Wednesday, Aug 1 (D63 at 720 kbps). There are 12 passes during the week, and overall coverage is nominal. The station 25 pass on Thursday, Aug 2, the station 15 pass on Friday, Aug 3, and the station 26 pass on Sunday, Aug 5 will all be carried out at 240 kbps. ESA New Norcia passes are scheduled for Wednesday, Aug 1, Friday, Aug 3, and Sunday, Aug 5. Week 32 (Aug 6-12) * Ahead has 70 meter passes every day of the week except Thursday, Aug 9, with all of them at 720 kbps except Friday, Aug 10. There are 11 passes during the week, and overall coverage is nominal. * Behind has a 70 meter pass on Thursday, Aug 9, using station 63. There are 11 passes during the week, and overall coverage is nominal. Week 33 (Aug 13-19) * Ahead has 70 meter passes every day of the week, with the Monday, Wednesday, and Saturday passes at 720 kbps. There are 8 passes during the week, and overall coverage is nominal. An ESA New Norcia pass is scheduled for Friday, Aug 17. * Behind has a 70 meter pass on Sunday, Aug 19, using station 14. There are 14 passes during the week, and overall coverage is nominal. The station 34 pass on Monday, Aug 13 will be carried out at 240 kbps. ESA New Norcia passes are scheduled for Wednesday, Aug 15, and Saturday, Aug 18. COORDINATED OBSERVATIONS ------------------------ ------------------------------------------------------------------------------- Scheduled activities for Week 29: M Jul 16 (198) T Jul 17 (199) Behind: Momentum dump, 19:30 UT W Jul 18 (200) T Jul 19 (201) F Jul 20 (202) S Jul 21 (203) S Jul 22 (204) ------------------------------------------------------------------------------- Scheduled activities for Week 30: M Jul 23 (205) T Jul 24 (206) W Jul 25 (207) T Jul 26 (208) F Jul 27 (209) S Jul 28 (210) S Jul 29 (211) ------------------------------------------------------------------------------- Scheduled activities for Week 31: M Jul 30 (212) T Jul 31 (213) W Aug 01 (214) T Aug 02 (215) F Aug 03 (216) S Aug 04 (217) S Aug 05 (218) ------------------------------------------------------------------------------- Scheduled activities for Week 32: M Aug 06 (219) T Aug 07 (220) W Aug 08 (221) T Aug 09 (222) F Aug 10 (223) S Aug 11 (224) S Aug 12 (225) ------------------------------------------------------------------------------- Scheduled activities for Week 33: M Aug 13 (226) T Aug 14 (227) W Aug 15 (228) T Aug 16 (229) F Aug 17 (230) S Aug 18 (231) S Aug 19 (232) ------------------------------------------------------------------------------- Upcoming events: 2012: * Aug DAWN - Vesta departure * Nov 4 Behind: Switch downlink rate to 120 kbps * Nov 13 Total solar eclipse, south Pacific 2013: * May 3 Ahead: Switch downlink rate to 120 kbps * Dec 12 Ahead: Mercury transit 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 * Oct 15 Behind: End use of 480 kbps on 70 m DSN subnet 2015: * Feb DAWN - Ceres arrival * Jan 20 - Mar 28 (TBC) Behind: Spacecraft behind Sun * 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 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