Mission Operations Days: 2002/096 to 2002/102
April 06, 2002 00:00:00 GMT to April 12, 2002 00:00:00 GMT
MODIS is in Science Mode, producing Science Data. Regularly scheduled calibration activities have resumed.
The patch to remove the FR OFF command from the CP Mode Transition to Safe Mode was successfully loaded. Any future Safe Mode transitions will not cause the loss of the FR patches that protect the FR from Watchdog Resets.
Current talks revolve around whether or not to write the formatter (KME_FAST) patch to EEPROM.
Terra Spacecraft and MODIS Instrument Status:
| AM-1 "Terra" is in Normal Mode PFM MODIS is in A-Side Science Mode |
||
|---|---|---|
| Component | State(s) | Comment |
| Blackbody | A On (290 K); B Off | Nominal |
| Calibration Electronics | A On; B Off | Nominal |
| Control Processor | A On; B Off | Nominal |
| Nadir Door | Unlatched, Open | Nominal |
| Space View Door | Unlatched, Open | Nominal |
| Solar Diffuser Door | Unlatched, Closed | Nominal |
| FDDI Formatter | A On; B Off | Nominal |
| FDDI Port | A On; B Off | Nominal |
| FIFO Memory | #1 & #2 On; #3 & #4 Off | Nominal |
| Format Processor | A On; B Off | Nominal |
| Power Supplies | #1 On, #2 Off | Nominal |
| PV VIS FPA | A On; B Off | Nominal |
| PV NIR FPA | A On; B Off | Nominal |
| PV SMIR FPA | A On; B Off | Nominal |
| PV LWIR FPA | A On; B Off | Nominal |
| PC LWIR FPA | A On; B Off | 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 On; B Off | Nominal |
| SDSM | Off | Nominal |
| SRCA | Off | Nominal |
| PS1 Survival Heater | Enabled | Nominal |
| PS2 Survival Heater | Enabled | Nominal |
| Timing Generator | A On; B Off | Nominal |
| Flight Software | Rev BD + 5 sets of patches
|
Nominal |
| Inhibit Ids Set | None | Nominal |
| TMON 66 | Disabled | Nominal |
| TMON 67 | Disabled | Nominal |
| TMON 68 | Enabled | Nominal |
| TMON 69 | Disabled | Nominal |
This Week's Completed MODIS Activities:
Saturday, April 6, 2002
None
Sunday, April 7, 2002
None
Monday, April 8, 2002
None
Tuesday, April 9, 2002
2002/100 21:57:57-22:11:08 ATC OA-16: SD/SDSM Screened Fixed Sun view A-side
2002/100 22:45:41-23:19:14 ATC OA-19: SRCA Full Radiometric A-side
2002/100 23:36:58-23:49:09 ATC OA-15: SD/SDSM Open Fixed SD view A-side
Wednesday, April 10, 2002
None
Thursday, April 11, 2002
None
Friday, April 12, 2002
None
This Week's Scheduled MODIS Activities Not Completed:
None
Upcoming Week's MODIS Events:
This month's remaining calibration activities will include SRCA Full Spectral, BB Heating Cycle, and a PV ECAL.
Maneuvers:
There will not be a MODIS Lunar Calibration at the beginning or end of April because the required roll angle will exceed the allowable limit. Expect the next possible MODIS Lunar Calibration toward the end of May.
The Drag Make Up (DMU) Maneuver on DOY 100 (4/10/2002) at 20:20:35 for 25 seconds was successful. The next DMU has not been announced.
The sixth Terra inclination maneuver has been postponed (originally scheduled for 4/2/2002). The new date for the maneuver is not yet known. The maneuver will only be done if it does not interfere with any Aqua spacecraft launch activities.
The Terra Deep Space Calibration Maneuver is still postponed. The maneuver date is not expected until late summer of 2002.
MODIS Anomalies:
See description at the top of this report.
Formatter Error Events:
The current patches loaded into the MODIS Formatter record the number of formatter error events (but not the address where they occurred). Statistics for the error rate will soon be generated and placed on the Internet. For data on the pre-safe mode error events, please see the link below.
The most recent error tracking spreadsheets can be retrieved from:
ftp://ftp.mcst.ssai.biz/pub/permanent/IOT/am1/analysis/FR_events/
An MS Excel spreadsheet called, AM1_FR_error_rollovers_current.xls contains the data for the times each error count "roll over" occurs.
General Instrument Comments:
MODIS is in A-side Science Mode.
MODIS Telemetry Trends:
All systems appear to be functioning properly. Tracking of the Formatter Error Rate has resumed.
Non-MODIS Significant Events:
Science Data Loss Reports can be viewed at:
http://jupiter02.gsfc.nasa.gov:591/ssrloss/
Select "Search Data Losses" and choose Data Type: MOD
Then press the big SUBMIT button.
Limited Life Item Status:
SRCA 10W Lamp #1: 197.7 of 500 hours SRCA 10W Lamp #2: 150.7 of 500 hours SRCA 10W Lamp #3: 159.9 of 500 hours SRCA 10W Lamp #4: 61.5 of 500 hours
SRCA 1W Lamp #1: 559.3 of 4000 hours SRCA 1W Lamp #2: 276.3 of 4000 hours
Solar Diffuser Door: 1841 of 3022 Movements Nadir Aperture Door: 536 of 1316 Movements Space View Door: 439 of 1316 Movements