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MODIS IOT Terra Weekly Report
Mission Operations Days: 2002/236 to 2002/242
August 23, 2002 20:00:00 GMT to August 30, 2002 20:00:00 GMT
Terra Spacecraft and MODIS Instrument Status:
|
Terra (AM-1) is in Normal Mode 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 + 7 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:
Friday, August 23, 2002None
Saturday, August 24, 2002None
Sunday, August 25, 2002None
Monday, August 26, 2002None
Tuesday, August 27, 2002
2002/239 18:23:00 TERRA low fidelity pointing
2002/239 19:14:22 ATC MOD_OA04_NIGHT_RATE.1
(moved ahead 00:03:23 to even out day/night rate from roll)
2002/239 19:38:33 - 19:41:36 Roll out
2002/239 19:42:34 - 19:49:20 ATC MOD_OA08_ROLL_MAN.3
2002/239 19:42:34 ATC MOD_SET_FR_RATE, TO = DAY
2002/239 19:42:36 ATC MOD_SET_FR_SCIABNORM, TO = ABNORM
2002/239 19:42:38 ATC MOD_SET_FR_PC_DCRCMP, TO = OFF
2002/239 19:42:40 ATC MOD_SET_FR_PV_DCRCMP, TO = OFF
2002/239 19:42:42 ATC MOD_SET_FR_ENC_DELTA, TO = -3072
2002/239 19:49:12 ATC MOD_SET_FR_ENC_DELTA, TO = 0
2002/239 19:49:14 ATC MOD_SET_FR_PV_DCRCMP, TO = ON
2002/239 19:49:16 ATC MOD_SET_FR_PC_DCRCMP, TO = ON
2002/239 19:49:18 ATC MOD_SET_FR_SCIABNORM, TO = NORM
2002/239 19:49:20 ATC MOD_SET_FR_RATE, TO = NIGHT
2002/239 19:49:46 - 19:52:49 Roll back
2002/239 20:04:50 TERRA high fidelity pointing
2002/239 20:10:36 ATC MOD_OA03_DAY_RATE.1
(moved later by 00:03:23 to even out day/night rate from roll)
2002/240 20:43:45 ATC OA16: SD/SDSM Screened, SDSM Fixed At Sun - A Side
2002/240 22:22:38 ATC OA15: SD/SDSM Open, SDSM Fixed At SD - A Side
None
Friday, August 30, 2002None
This Week's Scheduled MODIS Activities Not Completed:
None
Upcoming MODIS Events:
Maneuvers:
The sixth Terra inclination adjust maneuver has been pushed back to an unspecified date in September to facilitate Lockheed Martin development at Valley Forge for products to support long term planning of possible future inclination maneuvers.
The Terra Deep Space Calibration Maneuver is still postponed. The maneuver date is not expected until late summer of 2002.
MODIS Anomalies:
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 is approaching 60 million errors per day.
Intermittent bad frame count formatter event messages (xx1B) are being observed. This is one of the event messages being used to warn of potential impacts to the science data. The MODIS halt memory transfer command was being sent after each 1B-event message, but this has been discontinued. MODIS has had the FR LAST EVENT message memory dumped to find out where the 1B messages are coming from. The dumps show that the 1B messages are happening during the scan of the SD sector.
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 in a WinZip compressed archive called, AM1_FR_error_rollovers_current.zip contains the data for the times each error count "roll over" occurs.
General Instrument Comments:
MODIS is in A-side Science Mode with the blackbody maintained at 290K.
MODIS Telemetry Trends:
All systems appear to be functioning properly. Tracking of the Formatter Error Rate is continuing.
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: 201.0 of 500 hours
SRCA 10W Lamp #2: 152.8 of 500 hours
SRCA 10W Lamp #3: 162.0 of 500 hours
SRCA 10W Lamp #4: 61.5 of 500 hours
SRCA 1W Lamp #1: 559.8 of 4000 hours
SRCA 1W Lamp #2: 276.3 of 4000 hours
Solar Diffuser Door: 1907 of 3022 Movements
Nadir Aperture Door: 536 of 1316 Movements
Space View Door: 439 of 1316 Movements
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Last Update: Thursday, 04-Sep-2003 18:14:23 EDT
