Mission Operations Days: 2002/145 to 2002/151
May 25, 2002 00:00:00 GMT to May 31, 2002 00:00:00 GMT
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 + 6 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, May 25, 2002
None
Sunday, May 26, 2002
None
Monday, May 27, 2002
None
Tuesday, May 28, 2002
None
Wednesday, May 29, 2002
None
Thursday, May 30, 2002
None
Friday, May 31, 2002
None
This Week's Scheduled MODIS Activities Not Completed:
None
Upcoming MODIS Events:
Bi-weekly SDSM calibrations, as well as monthly radiometric calibration and bi-monthly PV ECAL, will be scheduled throughout June.
Maneuvers:
The next MODIS Lunar Calibration will be on June 29, 2002 (DOY 2002/180). The roll angle for this activity will be -15.6745 degrees.
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:
On day of year 128 at 21:11, the formatter EEPROM was loaded with a one-word patch. In the event that the formatter is shut down, upon restart, this patch will prevent the formatter from resetting due to the error events.
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). The error rate has increased significantly since the instrument safe mode recovery with an average of 350,000 errors occurring per day. For data on the 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: 200.5 of 500 hours
SRCA 10W Lamp #2: 152.4 of 500 hours
SRCA 10W Lamp #3: 161.6 of 500 hours
SRCA 10W Lamp #4: 61.5 of 500 hours
SRCA 1W Lamp #1: 559.6 of 4000 hours
SRCA 1W Lamp #2: 276.3 of 4000 hours
Solar Diffuser Door: 1859 of 3022 Movements
Nadir Aperture Door: 536 of 1316 Movements
Space View Door: 439 of 1316 Movements