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MODIS IOT Terra Weekly Report
Mission Operations Days: 2002/040 to 2002/046
February 8, 2002 20:00:00 GMT to February 15, 2002 20:00:00 GMT
NOTE: A flight software patch was loaded to the instrument at approximately 21:00 GMT February 15, 2002 (2002/046) to correct a known problem which allows time values in the MODIS data headers to have a value of 1000 (milliseconds) when the maximum should be 999. EDOS discards data that have invalid time values in the data headers.
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 + 4 set 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, February 9, 2002None
Sunday, February 10, 2002None
Monday, February 11, 2002None
Tuesday, February 12, 2002
2002/043 17:43:33 Real-time FOT commands IRU to low fidelity pointing
2002/043 18:38:00 Real-time FOT commands 29.25 second Drag Make-up Maneuver
2002/043 18:51:00 Real-time FOT commands IRU to high fidelity pointing
2002/044 21:11:20 ATC OA-15: SDSM A-side Open calibration, mirror fixed at SD
2002/044 22:03:12 22:36:45 ATC OA-19: SRCA A-side Full Radiometric calibration
2002/044 22:50:12 ATC OA-16: SDSM A-side Screened calibration, mirror fixed at Sun
None
This Week's Scheduled MODIS Activities Not Completed:
None
Upcoming Week's MODIS Events:
Friday, February 15, 2002
2002/064 20:57:17 Real-time FR Time code patch dump #1, MOD_MEM_DUMP(6,1,7315,0,1,1)
2002/064 20:58:34 Real-time FR Time code patch dump #2, MOD_MEM_DUMP(6,1,7333,0,1,1)
2002/064 20:59:46 Real-time FR Time code patch dump #3, MOD_MEM_DUMP(6,1,7346,0,1,1)
2002/064 21:01:58 Real-time FR Time code patch load #1, MOD_MEM_LOAD(ëAM1_MPR_MODIS_FR_MS_PATCH1',1,'N','DISABLE',1,1)
2002/064 21:03:21 Real-time FR Time code patch load #2,
MOD_MEM_LOAD(ëAM1_MPR_MODIS_FR_MS_PATCH2',1,'N','DISABLE',1,1)
2002/064 21:04:21 Real-time FR Time code patch load #3,
MOD_MEM_LOAD(ëAM1_MPR_MODIS_FR_MS_PATCH3',1,'N','DISABLE',1,1)
2002/064 21:05:39 Real-time FR Time code patch dump #1, MOD_MEM_DUMP(6,1,7315,0,1,1)
2002/064 21:06:50 Real-time FR Time code patch dump #2, MOD_MEM_DUMP(6,1,7333,0,1,1)
2002/064 21:08:04 Real-time FR Time code patch dump #3, MOD_MEM_DUMP(6,1,7346,0,1,1)
Maneuvers:
The next MODIS Lunar Calibration via a spacecraft roll maneuver is scheduled for March 3rd, 2002 (DOY 2002/062) with data collection from 07:12:11 to 07:18:41 GMT. The roll angle will be -13.0011 degrees.
There has been a change to the Terra inclination maneuver schedule. A new constraint has been imposed to have the maneuvers completed prior to the launch of the Aqua spacecraft (currently 4-18-02). The new inclination maneuver dates are February 26th, March 5th, March 19th, and April 4th, 2002. This new plan violates a previous constraint of not performing more than two maneuvers in any 7-week period. Therefore, Flight Dynamics products for dates beyond the next two maneuvers will have inaccuracies.
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 Formatter Error Rate is still increasing with a buffer rollover time of about five hours and forty minutes. At this time, the buffer is full and no new addresses are being recorded. A flight software patch may be loaded to the instrument to increase the size of the buffer. This is still under investigation.
Error tracking spreadsheets have been updated and 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_MMDDYY.xls contains the data for the times each of the error count "roll over" occurs (with the MMDDYY denoting the date the spreadsheet was made, the more recent date containing the most up-to-date information).
General Instrument Comments:
MODIS is in Science Mode on the A-side with the SVD and NAD open, operating with the Formatter Resolution Flight Software Patches (FRFSP) and a formatter time code patch.
MODIS Telemetry Trends:
No abnormal telemetry trends are being observed.
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: 195.9 of 500 hours
SRCA 10W Lamp #2: 149.0 of 500 hours
SRCA 10W Lamp #3: 158.2 of 500 hours
SRCA 10W Lamp #4: 61.5 of 500 hours
SRCA 1W Lamp #1: 559.0 of 4000 hours
SRCA 1W Lamp #2: 276.3 of 4000 hours
Solar Diffuser Door: 1811 of 3022 Movements
Nadir Aperture Door: 534 of 1316 Movements
Space View Door: 437 of 1316 Movements
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Last Update: Thursday, 04-Sep-2003 18:14:23 EDT
