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MODIS IOT Terra Weekly Report
Mission Operations Days: 2001/125 to 2001/131
May 4, 2001 20:00:00 GMT to May 11, 2001 20:00:00 GMT
Terra Spacecraft and MODIS Instrument Status:
|
Terra (AM-1) is in Normal Ops Mode MODIS is in Science Mode - B Side |
||
| Component | State(s) | Comment |
|---|---|---|
| Blackbody | A Off; B On (290 K) | Nominal |
| Calibration Electronics | A Off; B On | Nominal |
| Control Processor | A Off; B On | Nominal |
| Nadir Door | Unlatched, Open | Nominal |
| Space View Door | Unlatched, Open | Nominal |
| Solar Diffuser Door | Unlatched, Closed | Nominal |
| FDDI Formatter | A Off; B On | Nominal |
| FDDI Port | A On; B Off | Nominal |
| FIFO Memory | #1 & #2 Off; #3 & #4 On | Nominal |
| Format Processor | A Off; B On | Nominal |
| Power Supplies | #1 Off; #2 On | Nominal |
| PV VIS FPA | A Off; B On | Nominal |
| PV NIR FPA | A Off; B On | Nominal |
| PV SMIR FPA | A Off; B On | Nominal |
| PV LWIR FPA | A Off; B On | Nominal |
| PC LWIR FPA | A Off; B On | Nominal |
| RC Outgas Heaters | All Off (CS, IS, OS) | Nominal |
| RC LWIR FPA Heater | On (83 K) | Nominal |
| RC SMIR FPA Heater | Off | Nominal |
| Scan Assembly | A Off; B On | Nominal |
| SDSM | A Off; B Off | Nominal |
| SRCA | A Off; B Off | Nominal |
| PS1 Survival Heater | Enabled | Nominal |
| PS2 Survival Heater | Enabled | Nominal |
| Timing Generator | A Off; B On | Nominal |
| Flight Software | Rev BD + 2 set of patches
| Nominal |
| Inhibit Ids Set | None | Nominal |
| TMONs Enabled | 68 | Nominal |
This Week's Completed MODIS Activities:
Saturday, May 05, 2001None
Sunday, May 06, 2001None
Monday, May 07, 2001None
Tuesday, May 08, 2001None
Wednesday, May 09, 2001
2001/129 15:24:44-15:36:12 ATC OA15: SD/SDSM Open
2001/129 16:15:59-16:49:32 ATC OA19: SRCA Full Radiometric
2001/129 17:03:37-17:15:05 ATC OA16: SD/SDSM Screened
None
Friday, May 11, 20012001/131 16:03:50-17:01:30 ATC OA23: SRCA Full Spatial
This Week's Scheduled MODIS Activities Not Completed:
None
Upcoming MODIS Events:
Saturday, May 12, 2001None
Sunday, May 13, 2001None
Monday, May 14, 2001None
Tuesday, May 15, 2001None
Wednesday, May 16, 2001None
Thursday, May 17, 2001None
Friday, May 18, 2001None
Maneuvers:
The Drag Make Up Maneuver occurred as scheduled on Wednesday, May 8, 2001 (OPS DOY 2001/128). Time of the maneuver was 20:20:30 with an 18 second duration. The loss and re- acquisition of pointing accuracy period is 18:50:30-21:50:30.
There will be no MODIS Lunar Roll Maneuver in May because the roll angle would have been too great (more than 20-degree roll required). The next attempt for a roll maneuver will be June.
The next MODIS Lunar Roll Maneuver is scheduled for June 10, 2001. Center time of the roll is currently set at 23:10:40 for a roll of -20.0293 degrees.
MODIS Anomalies:
None
General Instrument Comments:
MODIS is in Science Mode on the B-side with the SVD and NAD open, operating with the Formatter Resolution Flight Software Patches (FRFSP).
MODIS Telemetry Trends:
Telemetry is trending nominally.
Non-MODIS Significant Events:
MISR Anomaly:
MISR went to Safe Mode at 2001/125-00:07:14 while attempting to move their Goniometer. The MISR IOT executed several procedures trying to move the Goniometer to +58 degrees. This position exceeded a software range of +40 degrees causing the computer to stop the Goniometer after 25 seconds. The instrument was in Global Mode at the time and all of the additional processing caused an overload of the computer putting MISR in Survival Mode.
After determining no harm had been caused to the instrument, MISR's PROM was reset on DOY 128. MISR's Flight Software was reloaded on DOY 130. As of approximately 2001/131-10:00, MISR has returned to nominal operations.
MOPITT Anomaly:
MOPITT's Displacement Side B position went Red (at 2001/127-04:07) during a Real-Time contact on DOY 127. The Flight Controllers sent the Red Limit Response procedure to Safe the Instrument (at 2001/127-04:18).
After analyzing telemetry history, the MOPITT team has determined the event was not critical. MOPITT has been commanded into its Standby Mode. The MOPITT IOT plans to transition out of Standby to Science Mode sometime next week pending final analysis verification.
Limited Life Item Status:
SRCA 10W Lamp #1: 186.0 of 500 hours
SRCA 10W Lamp #2: 142.9 of 500 hours
SRCA 10W Lamp #3: 152.1 of 500 hours
SRCA 10W Lamp #4: 61.5 of 500 hours
SRCA 1W Lamp #1: 557.5 of 4000 hours
SRCA 1W Lamp #2: 276.3 of 4000 hours
Solar Diffuser Door: 1609 of 3022 Movements
Nadir Aperture Door: 532 of 1316 Movements
Space View Door: 437 of 1316 Movements
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Last Update: Tuesday, 25-Feb-2003 17:36:21 EST
