=================================================================== Tohban report: 2009/04/07 - 2009/04/13 last data checked 2009/04/11 00-24 UT =================================================================== Data Collection Status ============= BAU processor cold reset on THEMIS A that caused the science data from that orbit to be lost. The spacecraft came up on a BGS pass at 2009/100 20:36:30 with an incremented Cold Reset Counter, and with no telemetry data from the PCM module (power, thermal data) and no data from the IDPU. During this pass the mode log and the stored engineering data were dumped. Analysis of the stored engineering data indicate that the reset occurred at 2009/100 16:15:13. BAU reset recovery was successfully accomplished during the BGS pass at 2009/100 21:17:30, beginning with forcing another cold reset via ground command to restore communications between the BAU and the PCM. IDPU recovery and instrument turn-on and configuration were performed during another, specially scheduled BGS pass at 2009/100 23:19:00. The streamlined procedures and procs had the instruments up and configured within 20 minutes. This type of anomaly had been seen before, once each on THEMIS C, D and E. The root cause is not exactly known. 2009/099 20:30:50 (end of previous data dump) to 2009/100 23:39:00 (completion of reset recovery): 27.15 hours, including 12 hours of Fast Survey. THEMIS A FGM: data gap Apr 9 1400 UT - Apr 10 23:30 UT (BAU cold reset - see above) ESA: data gap Apr 9 1900 UT - Apr 10 23:30 UT (BAU cold reset - see above) SST: data gap Apr 9 1900 UT - Apr 10 23:30 UT (BAU cold reset - see above) EFI: data gap Apr 9 1900 UT - Apr 10 23:30 UT (BAU cold reset - see above) SCM: data gap Apr 9 1900 UT - Apr 10 23:30 UT (BAU cold reset - see above) THEMIS B FGM: full coverage Apr 5-11 ESA: expected data gap Apr 5 0000 UT - Apr 6 0430 UT (slow survey out coming out of perigee) expected data gap Apr 8 1600 UT - Apr 10 0400 UT (slow survey out coming out of perigee) SST: expected data gap Apr 5 0000 UT - Apr 6 0430 UT (slow survey out coming out of perigee) expected data gap Apr 8 1600 UT - Apr 10 0400 UT (slow survey out coming out of perigee) EFI: full coverage Apr 5-11 SCM: full coverage Apr 5-11 THEMIS c FGM: full coverage Apr 5-11 ESA: full coverage Apr 5-11 SST: full coverage Apr 5-11 EFI: full coverage Apr 5-11 SCM: full coverage Apr 5-11 THEMIS D FGM: full coverage Apr 5-11 ESA: full coverage Apr 5-11 SST: full coverage Apr 5-11 EFI: full coverage Apr 5-11 SCM: full coverage Apr 5-11 THEMIS E FGM: full coverage Apr 5-11 ESA: full coverage Apr 5-11 SST: full coverage Apr 5-11 EFI: full coverage Apr 5-11 SCM: full coverage Apr 5-11 Triggers and burst data: Working appropriately with good capture around dipoloarisation events. Density trigger ICCR for Dusk side science approved Operations ================ ICCRs -------- Tohban approval of ICCR 085 -- to set the particle burst trigger on TH-B & -C to density for the Dusk science sector where the outer probes will be making magnetopause crossings. Implement on Monday 4/13, when the dusk science for the outer probes will just be beginning. Comments --------- Approval given to set FS on outer probes only for Magnetopause crossings with emphases on the inside. It will effect data collection starting next week till Apr 25. P1 2h out side and 3h inside P2 2.5h out side and 3.5 h inside Reasoning: Bow shocks at the flank are weak. On the inside of the MP we try to catch the transition into the plasmasphere. Significant events ------------------- +Apr 5 +Apr 6 DSS_54 THEMIS_B 2.992 2009/096 22:20:00 2009/096 22:50:00 TR2 # Ranging pass BGS_11M THEMIS_C 2.850 2009/096 22:56:00 2009/096 23:16:00 TR2 # SOH check and track [JM] - upload IDPU FSW 0x52 - ICCR_JSM83 BGS_11M THEMIS_B 2.950 2009/096 23:48:20 2009/097 00:08:20 TR2 # SOH check and track [JM] - upload IDPU FSW 0x52 - ICCR_JSM83 +Apr 7 AGO_9M THEMIS_D 2.880 2009/097 20:50:00 2009/097 21:00:00 TR2 # SOH check and track [JT] - pre-maneuver table loads - blind acquisition AGO_9M THEMIS_E 2.880 2009/097 21:25:00 2009/097 21:35:00 TR2 # SOH check and track [JT] - pre-maneuver table loads - blind acquisition MILA_9M2 THEMIS_A 2.880 2009/097 23:25:00 2009/097 23:45:00 TR2 # SOH check and track [JT] - pre-maneuver table loads + Apr 8 HBK_10M THEMIS_B 9.500 2009/098 12:18:00 2009/098 12:37:00 TR10 # Data dump - late acquisition - reason under investigation - 4 bursts remain onboard BGS_11M THEMIS_D -9.300 2009/098 16:44:00 2009/098 17:33:20 TR10 # ---> Apogee raise maneuver [ME] - P3 SM1A_D2 - MAN ID 258 - dump VC1 and VC3 - nominal burn AGO_9M THEMIS_D 9.300 2009/098 17:55:00 2009/098 18:30:00 TR9 # ---> Attitude precession maneuver [ME] - P3 - MAN ID 259 - dump VC3 and VC4 - nominal burn BGS_11M THEMIS_E 9.200 2009/098 18:42:00 2009/098 19:10:00 TR10 # ---> Apogee raise maneuver [JM] - P4 SM1A_D2 - MAN ID 260 - dump VC1, VC3 and VC4 - nominal burn TDRS_6 THEMIS_A 9.100 2009/098 19:13:00 2009/098 19:23:00 TR2 # Pre-maneuver pass [JM] - enable propulsion bus for 19:33 burn start AGO_9M THEMIS_E -9.200 2009/098 19:22:00 2009/098 20:25:00 TR10 # ---> Attitude precession maneuver [JM] - P4 - MAN ID 261 - dump VC3 and VC4 - nominal burn BGS_11M THEMIS_A -9.100 2009/098 19:36:25 2009/098 20:14:00 TR10 # ---> Apogee raise maneuver [JT] - P5 SM1A_D2 - MAN ID 262 - burn start at 19:33 - nominal burn MILA_9M2 THEMIS_D 2.590 2009/098 21:30:00 2009/098 21:50:00 TR2 # SOH check and track [ME] - post-maneuver instrument operations MILA_9M2 THEMIS_E 2.590 2009/098 22:25:00 2009/098 22:45:00 TR2 # SOH check and track [DP] - post-maneuver instrument operations MILA_9M2 THEMIS_A 2.590 2009/098 23:20:00 2009/098 23:40:00 TR2 # SOH check and track [DP] - post-maneuver instrument operations + Apr 9 BGS_11M THEMIS_D 9.300 2009/099 17:26:50 2009/099 17:51:50 TR10 # Data dump [JM] - used TLE set from early OD with track time bias +63 sec and ele bias +1.0 deg - 5 bursts remain onboard BGS_11M THEMIS_E 9.200 2009/099 19:03:15 2009/099 19:28:15 TR10 # Data dump [JM] - no track time bias applied - used clean post-OD track file BGS_11M THEMIS_A 9.100 2009/099 20:05:50 2009/099 20:30:50 TR10 # Data dump [JM] - used track files from reconstructed vector with track time bias +18 sec derived from post-maneuver OD MILA_9M2 THEMIS_A 2.590 2009/099 20:46:00 2009/099 21:06:00 TR2 # SOH check and track - advised station to apply track time bias +18 sec WHS_18M1 THEMIS_A 2.660 2009/099 22:00:00 2009/099 22:20:00 TR2 # SOH check and track - LRO proficiency test - application of track time bias not required HBK_10M THEMIS_C 9.400 2009/100 12:56:00 2009/100 13:16:00 TR9 # Data dump - call HBK to verify schedule +Apr 10 USNAU_13M THEMIS_E 2.540 2009/100 17:05:00 2009/100 17:20:00 TR2 # SOH check and track [JM] - pre-maneuver table loads TDRS_6 THEMIS_E 9.200 2009/100 19:01:00 2009/100 19:11:00 TR2 # Pre-maneuver pass [GL] - enable propulsion bus for 19:23 burn start BGS_11M THEMIS_E 9.200 2009/100 19:24:30 2009/100 20:04:20 TR10 # ---> Apogee drop maneuver [GL] - P4 SM1B_D2 - MAN ID 263 - nominal burn - # attitude precession maneuver - P4 - MAN ID 264 - nominal burn BGS_11M THEMIS_A 9.100 2009/100 20:36:30 2009/100 21:01:30 TR10 # Data dump [GL] - spacecraft came up on pass with cold reset - dumped VC1 and mode log BGS_11M THEMIS_A 2.560 2009/100 21:17:30 2009/100 21:52:00 TR7 # SOH check and track [JT] - perform cold reset recovery - verified IDPU off - forced second cold reset to restore PCM TLM MILA_9M2 THEMIS_E 2.690 2009/100 22:11:00 2009/100 22:31:00 TR2 # SOH check and track [ME] - post-maneuver instrument operations BGS_11M THEMIS_A 2.560 2009/100 23:19:00 2009/101 00:16:00 TR6 # SOH check and track [JM] - continue cold reset recovery with IDPU and instrument turn-on BGS_11M THEMIS_D 2.760 2009/101 00:59:50 2009/101 01:19:50 TR32 # SOH check and track [JT] - pre-maneuver table loads BGS_11M THEMIS_B 2.660 2009/101 02:20:00 2009/101 02:45:00 TR32 # SOH check and track - blind acquisition +Apr 11 BGS_11M THEMIS_D -9.300 2009/101 17:57:00 2009/101 18:40:25 TR10 # ---> Apogee drop maneuver [TBD] - P3 SM1B_D2 - MAN ID 265 - change data rate to 256K at AOS and back to 1024K at 18:06 TDRS_4 THEMIS_D 9.300 2009/101 19:11:00 2009/101 19:21:00 TR2 # ---> Attitude precession maneuver [TBD] - P3 - MAN ID 266 AGO_9M THEMIS_D 9.300 2009/101 20:30:00 2009/101 20:50:00 TR7 # Data dump [TBD] - post-maneuver instrument operations BGS_11M THEMIS_D 2.760 2009/102 06:13:45 2009/102 06:33:45 TR12 # SOH check and track - blind acquisition HBK_10M THEMIS_B 9.500 2009/102 11:34:00 2009/102 11:55:00 TR10 # Data dump - call HBK to verify schedule Science ========= +Apr 5 several dipolarization events 0800 UT TH A, D and E C in magnetosheath much of the time + Apr 6 several dipolarizations THA ~09 UT B in magnetosheath E plasmapause transition 0200 UT +Apr 7 A,D and E multiple semi periodic dipolarizations (30 minute to 1 hour period) B and C in magnetosheath-with what looks like some magnetopause transitions +Apr 8 Nice magnetopause crossing Themis B 0700 UT Multiple semi-periodic dipolarisations THEMIS A, D, E, C +Apr 9 diamagnetic cavities in sheath from B +Apr 10 More dipolarisations A,D,E +Apr 11 mirror mode/diamagetic cavities in sheath from B +Apr 11 Misc ====== Need to turn off FAST survey during eclipse