Mission Operations Days: 2002/194 to 2002/200
July 13, 2002 00:00:00 GMT to July 19, 2002 00:00:00 GMT
Aqua Spacecraft and MODIS Instrument Status:
| PM-1 "Aqua" is in Fine Pointing Standby Mode FM1 MODIS is in B-Side Science Mode |
||
|---|---|---|
| Component | State(s) | Comment |
| Blackbody | A Off; B On | Science Mode |
| Calibration Electronics | A Off; B On | Science Mode |
| Control Processor | A Off; B On | Science Mode |
| Nadir Door | Unlatched, Open | Science Mode |
| Space View Door | Unlatched, Open | Science Mode |
| Solar Diffuser Door | Unlatched, Closed | Science Mode |
| FDDI Formatter | A Off; B On | Science Mode |
| FDDI Port | A Off; B On | Science Mode |
| FIFO Memory | #1 & #2 Off; #3 & #4 On | Science Mode |
| Format Processor | A Off; B On | Science Mode |
| Power Supplies | #1 Off, #2 On | Science Mode |
| PV VIS FPA | A Off; B On | Science Mode |
| PV NIR FPA | A Off; B On | Science Mode |
| PV SMIR FPA | A Off; B On | Science Mode |
| PV SMIR FPA | A Off; B On | Science Mode |
| PV LWIR FPA | A Off; B On | Science Mode |
| PC LWIR FPA | A Off; B On | Science Mode |
| RC Outgas Heaters | All 3 (CS, IS, OS) Off | Science Mode |
| RC LWIR FPA Heater | Off | Science Mode |
| RC SMIR FPA Heater | On | Science Mode |
| Scan Assembly | A Off; B On | Science Mode |
| SDSM | Off | Science Mode |
| SRCA | Off | Science Mode |
| PS1 Survival Heaters | Enabled | Science Mode |
| PS2 Survival Heaters | Enabled | Science Mode |
| Timing Generator | A Off; B On | Science Mode |
| Flight Software | Rev BJ | Science Mode |
| Inhibit Ids Set | None | Science Mode |
This Week's Completed MODIS Activities:
Saturday, July 13, 2002
None
Sunday, July 14, 2002
None
Monday, July 15, 2002
None
Tuesday, July 16, 2002
None
Wednesday, July 17, 2002
2002/198 21:32:05 MCL OA-16: SD/SDSM calibration with SDSM fixed at Sun View MOD_OA16_SD_SCREEN_FIXED_SUN.1
2002/198 23:10:58 MCL OA15: SD/SDSM with SDSM fixed at SD View MOD_OA15_SD_OPEN_FIXED_SD.1
Thursday, July 18, 2002
2002/199 22:22:08 MCL Single command to set nominal formatter day rate MOD_OA03_FR_DAY_RATE.1
2002/199 23:01:40 MCL Single command to move formatter night rate ahead by 10:00 MOD_OA04_FR_NIGHT_RATE.2
2002/199 23:12:30 MCL Single command to set formatter day rate MOD_OA03_FR_DAY_RATE.1
Twenty minutes of Formatter Day Rate data collection while over ground-track night.
2002/199 23:32:30 MCL Single command for formatter night rate MOD_OA04_FR_NIGHT_RATE.2
Friday, July 19, 2002
Night time ground track recorded in Formatter Day Rate: 2002/200 00:11:01 MCL Single command to move formatter day rate later by 10:00 MOD_OA03_FR_DAY_RATE.1
2002/200 00:50:33 MCL Single command for nominal formatter night rate MOD_OA04_FR_NIGHT_RATE.2
2002/200 19:47:36 MCL Single command for nominal formatter day rate MOD_OA03_FR_DAY_RATE.1
2002/200 20:33:45 MCL Single command to move formatter night rate ahead by 3:23 MOD_OA04_FR_NIGHT_RATE.2
Lunar Roll Maneuver (-19.3540 degree roll)
2002/200 21:11:54 - 21:18:40 MCL Lunar calibration via roll maneuver MOD_OA08_ROLL_MAN.1 (command details listed below)
2002/200 21:11:54 MCL Set formatter to Day rate
2002/200 21:11:56 MCL Set SCIABNORM flag to ABNORM
2002/200 21:11:58 MCL Disable PC DC Restore
2002/200 21:12:00 MCL Disable PV DC Restore
2002/200 21:12:02 MCL Sector Rotation to -3072
2002/200 21:12:02 - 21:18:32 Lunar calibration data collection
2002/200 21:18:32 MCL Sector Rotation to zero
2002/200 21:18:34 MCL Enable PC DC Restore
2002/200 21:18:36 MCL Enable PV DC Restore
2002/200 21:18:38 MCL Set SCIABNORM flag to NORM
2002/200 21:18:40 MCL Set formatter to Night rate
2002/200 21:29:52 MCL Single command to move formatter day rate later by 3:23 MOD_OA03_FR_DAY_RATE.1
2002/200 21:33:45 MCL Single command for nominal formatter night rate MOD_OA04_FR_NIGHT_RATE.2
This Week's Scheduled MODIS Activities Not Completed:
None
Upcoming MODIS Events:
Weekly SDSM calibrations.
Maneuvers:
The Deep Space Calibration pitch maneuver(s) have been indefinitely suspended pending mission review.
MODIS Anomalies:
The first two commands of SCS #154, used for the OA-16, SD Screened, SDSM fixed at Sun calibration scheduled for Wednesday, July 10th, were not executed. The two missing commands were MOD_SET_DR_SDD_DRVB and MOD_PERFORM_CP_MACRO NUMBER = 10 (opens the SDD to the screened position). All remaining commands in SCS #154 were processed successfully and this calibration had been successfully performed on orbit three times prior to the anomaly.
No valid command echo was processed by the MODIS instrument for the two missing commands. The Aqua Instrument Support Controller (ISC) and Command and Telemetry Controller (CTC) did not produce any error messages at the time of the missing commands. The memory contents of SCS #154 were dumped and verified to contain the correct commands. At this time, there is no definitive explanation for the dropped commands.
A similar event did occur during thermal-vacuum testing where a single MODIS command within an SCS was not executed. There were three potential causes listed for the error, but no one cause could be isolated to explain the problem. The anomaly investigation is still continuing, but at this time, it is considered safe to resume the weekly OA-16 calibration schedule.
Between 183/15:16:20 and 189/13:40:21, the SMIR Vdet setting was incorrect with a value of 136 instead of 184. When the Aqua spacecraft went to Safe Mode on 2002/178, MODIS was in the middle of performing a SMIR Vdet sweep. The instrument was returned to Science Mode on 2002/183, but the SMIR Vdet setting was not returned to the default value of 184. The SMIR Vdet setting was not reset until the calibrations were re-run on day 189.
5D/77 CP Event Pairs:
- 68 pairs have been received total.
- 23 pairs between the first Turn On (DOY 127) and S/C to Survival Mode (DOY 139).
- 32 pairs between the second Turn On (DOY 144) and Science Mode Transition (DOY 158).
- 4 pairs between Science Mode Transition (DOY 158) and Safe Mode Transition (DOY 178).
- 7 pairs between Safe Mode Transition (DOY 178) and Standby Mode Transition (DOY 182).
- 2 pairs between Standby Mode Transition (DOY 182) and Science Mode Transition (DOY 183).
- 0 pairs since Science Mode Transition (DOY 183).
- The last event pair was seen on DOY 183 at 03:24:20.
5D Single CP Event:
- No 77 following message, no related MODIS commanding in proximity.
- 3 single events have been received, times listed below.
- DOY 162 at 14:16:59 (roughly 92 hours after Science Mode transition).
- DOY 166 at 20:44:46 (midway between the 10.4 and 13 degree yaw maneuvers, not during).
- DOY 167 at 14:27:50 (no commands in near proximity).
77 Single CP Event:
- No 5D preceding message, no related MODIS commanding in proximity.
- 3 single event has been received, time listed below.
- DOY 164 at 00:35:39 (64 seconds after CP Macro 9, SDD to Close, in an SD/SDSM Screened, SDSM fixed at Sun, calibration. The macro was still running when the event occurred).
- DOY 175 at 23:00:04 (84 seconds after CP Macro 11, SDD to Open, in an SD/SDSM Open, SDSM fixed at SD, calibration. The macro was still running when the event occurred).
- DOY 177 at 21:26:36 (30 seconds after the SDSM was commanded to its home position, in an SD/SDSM Open, SDSM fixed at SD, calibration. The SDSM was still moving when the event occurred).
5D Yaw Maneuver Events:
- 28 single 5D event messages were observed throughout the SD/SDSM Yaw Maneuvers.
- Each of these events occurred within 5 to 10 seconds after a sector rotation (to -3400) command for the SD/SDSM calibrations.
- An event did not occur for every calibration, and some calibrations resulted in two 5D events.
General Instrument Comments:
FM1 MODIS is in Science Mode. The SVD and NAD are Open. The Black Body is powered and set at 285K. The Cold Focal Planes are controlling to 83K.
MODIS Telemetry Trends:
MODIS FM1 temperatures have returned to their nominal Science Mode profile trends after the return to Science Mode on DOY 2002/183.
Non-MODIS Significant Events:
None.
The Aqua status can be viewed online at:
http://jupiter02.gsfc.nasa.gov/links/links.htm
Limited Life Item Status:
SRCA 10W Lamp #1: 203.2 of 500 hours
SRCA 10W Lamp #2: 177.5 of 500 hours
SRCA 10W Lamp #3: 180.3 of 500 hours
SRCA 10W Lamp #4: 57.7 of 500 hours
SRCA 1W Lamp #1: 500.0 of 5000 hours
SRCA 1W Lamp #2: 269.8 of 5000 hours
Solar Diffuser Door: 1770 of 3022 Movements
Nadir Aperture Door: 1049 of 1316 Movements
Space View Door: 628 of 1316 Movements