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MODIS IOT Terra Weekly Report
Mission Operations Days: 2003/116 through 2003/122
April 25, 2003 20:00:00 GMT to May 2, 2003 20:00:00 GMT
Terra Spacecraft and MODIS Instrument Status:
|
AM-1 "Terra" is in Normal Mode PFM MODIS is in A-Side Nominal Science Mode (Cross Strapped with FR B) |
||
| Component | State(s) | Comment |
|---|---|---|
| Blackbody | A On (290K); B Off | Nominal Science Mode |
| Calibration Electronics | A On; B Off | Nominal Science Mode |
| Control Processor | A On; B Off | Nominal Science Mode |
| Nadir Door | Unlatched, Open | Nominal Science Mode |
| Space View Door | Unlatched, Open | Nominal Science Mode |
| Solar Diffuser Door | Unlatched, Closed | Nominal Science Mode |
| FDDI Formatter | A On; B Off | Nominal Science Mode |
| FDDI Port | A On; B Off | Nominal Science Mode |
| FIFO Memory | #1 & #2 On; #3 & #4 Off | Nominal Science Mode |
| Format Processor | A Off; B On | Nominal Science Mode |
| Power Supplies | #1 On, #2 Off | Nominal Science Mode |
| PV VIS FPA | A On; B Off | Nominal Science Mode |
| PV NIR FPA | A On; B Off | Nominal Science Mode |
| PV SMIR FPA | A On; B Off | Nominal Science Mode |
| PV LWIR FPA | A On; B Off | Nominal Science Mode |
| PC LWIR FPA | A On; B Off | Nominal Science Mode |
| RC Outgas Heaters | All 3 (CS, IS, OS) Off | Nominal Science Mode |
| RC LWIR FPA Heater | On (83K) | Nominal Science Mode |
| RC SMIR FPA Heater | Off | Nominal Science Mode |
| Scan Assembly | A On; B Off | Nominal Science Mode |
| SDSM | Off | Nominal Science Mode |
| SRCA | Off | Nominal Science Mode |
| PS1 Survival Heater | Enabled | Nominal Science Mode |
| PS2 Survival Heater | Enabled | Nominal Science Mode |
| Timing Generator | A On; B Off | Nominal Science Mode |
| Flight Software | Rev BD + 9 sets of patches
| Nominal Science Mode |
| Inhibit Ids Set | none | Nominal Science Mode |
| TMON 66 | Disabled | Nominal Science Mode |
| TMON 67 | Disabled | Nominal Science Mode |
| TMON 68 | Enabled | Nominal Science Mode |
| TMON 69 | Disabled | Nominal Science Mode |
This Week’s Completed MODIS Activities:
Saturday, April 26, 20032003/116 13:00:00 ATC MOD_OA26_BB_290K_A.1 Set blackbody temperature to 290K on the A-side
Sunday, April 27, 2003None
Monday, April 28, 2003None
Tuesday, April 29, 2003None
Wednesday, April 30, 2003None
Thursday, May 1, 2003None
Friday, May 2, 2003None
This Week’s Scheduled MODIS Activities Not Completed:
None
Upcoming MODIS Events:
Monday, May 5, 20032003/125 12:10:21 - 13:02:00 ATC MOD_OA22_SRCA_FULL_SPECT_1A.4
OA-22: SRCA Full Spectral Test Part 1 - A Side
Data Collect Centered on S/C Night (12:29:35 - 13:01:59)
2003/125 14:05:35 - 14:40:20 ATC MOD_OA22_SRCA_FULL_SPECT_2A.4
OA-22: SRCA Full Spectral Test Part 2 - A Side
Data Collect Centered on S/C Night (14:08:35 - 14:40:19)
2003/125 15:27:37 - 16:18:53 ATC MOD_OA22_SRCA_FULL_SPECT_3A.4
OA-22: SRCA Full Spectral Test Part 3 - A Side
Data Collect Centered on S/C Night (15:47:24 - 16:18:52)
2003/125 17:21:38 - 17:59:36 ATC MOD_OA22_SRCA_FULL_SPECT_4A.3
OA-22: SRCA Full Spectral Test Part 4 - A Side
Data Collect Centered on S/C Night (17:24:38 - 17:59:35)
2003/126 20:18:12 - 20:31:23 ATC MOD_OA16_SD_SCREEN_FXD_SUN_A.1
OA-16: SD/SDSM Screened with SDSM Fixed at Sun View - A Side
2003/126 21:57:04 - 22:10:15 ATC MOD_OA15_SD_OPEN_FIXED_SD_A.1
OA-15: SD/SDSM Screened with SDSM Fixed at SD View - A Side
May calibrations for the PFM MODIS instrument will include biweekly SDSM, monthly SRCA Radiometric, and bimonthly SRCA Full Spatial calibrations.
Maneuvers:
There will not be a Terra MODIS lunar calibration during the month of May. The required roll angle (-25.2278 degrees) exceeds the maximum allowed angle of -20 degrees.
The Terra Drag Make-up Maneuver was successfully executed on Wednesday, April 30, 2003 (doy 120) at 19:15 GMT. The Loss of Pointing Accuracy window was 2003/120 18:12:00 to 20:22:02.
MODIS Anomalies:
On Wednesday, April 23, 2003, the 4 part SRCA Full Spectral calibration was planned. A user error with the scheduling software resulted in the first part of the calibration being scheduled and then subsequently unscheduled. This resulted in only parts 2, 3, and 4 actually being scheduled into the stored command loads. Parts 1 and 3 of the calibration turn on the SRCA before beginning the 30 W and 10 W (respective) portions of the Spectral calibrations. Parts 2 and 4 complete their respective portions of the Spectral calibrations and then turn off the SRCA. Since part 1 was not scheduled, the SRCA was not powered when the command for part 2 was issued. Therefore, part 2 effectively did not execute, and thus no part of the 30 W portion of the Spectral calibration occurred.
At no point was the health of MODIS in danger due to the scheduling error. The entire 4 parts of the calibration will be rescheduled in the near future. More stringent user checking will take place in the future scheduling events to ensure another user error of this sort does not occur again.
General Instrument Comments:
MODIS is in Science Mode, using all A-side components, but cross-strapped to Formatter B, with the blackbody maintained at 290K.
MODIS Telemetry Trends:
Nominal telemetry trending is ongoing.
Non-MODIS Significant Events:
The EMOS mission status webpage (which includes instrument data loss records) can be found at the following URL. Note that a password is now required to access the EOS mission links web pages. There are directions at the URL below for how to obtain a username/password.
http://jupiter02.gsfc.nasa.gov/links/links.htmLimited Life Item Status:
SRCA 10W Lamp #1: 210.6 of 500 hours
SRCA 10W Lamp #2: 157.8 of 500 hours
SRCA 10W Lamp #3: 167.0 of 500 hours
SRCA 10W Lamp #4: 62.2 of 500 hours
SRCA 1W Lamp #1: 561.8 of 4000 hours
SRCA 1W Lamp #2: 276.7 of 4000 hours
Solar Diffuser Door: 2139 of 3022 Movements
Nadir Aperture Door: 536 of 1316 Movements
Space View Door: 439 of 1316 Movements
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to ask a question about Level 1B usage, algorithms or software.
Last Update: Thursday, 04-Sep-2003 17:36:30 EDT
