MODIS IOT Terra Weekly Report

Mission Operations Days: 2000/302 to 2000/308
October 27, 2000 20:00:00 GMT to November 3, 2000 20:00:00 GMT

• MODIS is now operating via B/Redundant-Side Components (Except the FDDI Port)
• SMIR Itwk/Vdet Values have been set to 79/110 (respectively)
• All Band/Detector Gains have returned to their Initial Launch Values

Terra Spacecraft and MODIS Instrument Status:

This Week’s Completed MODIS Activities:

None

None

2000/304 14:11:13 Real-Time Turn off MODIS proc: MOD_ALL_OFF
2000/304 14:12:50 Real-Time Turn on MODIS with PS2 and CPB proc: MOD_TURN_ON('PS2','CPB')
2000/304 14:15:35 Real-Time Disable TMON #68 commanding, FIFO double write proc: FS1_EXEC_TMON_GRP_COM(0,68,68)
2000/304 14:21:29 Real-Time Transition to Science Mode on the B-side proc: MOD_SCI_TXTN_B
2000/304 14:22:04 Real-Time Enable TMON #68 commanding, FIFO double write proc: FS1_EXEC_TMON_GRP_COM(1,68,68)
2000/304 14:24:43 Real-Time Reset Formatter to Upload Mode proc: MOD_FR_RESET_UPLD
2000/304 14:26:00 Real-Time Load Formatter Patch #1 proc: MOD_MEM_LOAD('AM1_MPR_MODIS_FR_ANOMALY2',2,'N','DISABLE',1,1)
2000/304 14:27:00 Real-Time Load Formatter Patch #2 proc: MOD_MEM_LOAD('AM1_MPR_MODIS_FR_RECOVERY',64,'N','DISABLE',1,2)
2000/304 14:27:35 Real-Time Restart Formatter with ASTATE = 0 proc: MOD_FR_RESTART(0)
2000/304 14:57:54 - 15:09:52 X-band Direct Broadcast service to Goddard (First look verifying collection of MODIS Science Data)
2000/304 15:01:00 Ground-Proc Set Yellow Limits for CP Status Word 6 (this produces a yellow limit if the Formatter Patch encounters an error not previously seen.) proc: MOD_ALARMS_CP_ST_06('ENABLE')
2000/304 15:02:00 Ground-Proc Set Yellow Limits for CP UART Reset (this produces a yellow limit if the CP loses communication with the Format Engine.) proc: MOD_ALARMS_URT_RST('ENABLE')

2000/305 19:12:36 Real-Time Set SMIR Itwk/Vdet to 79/110 proc: MOD_VDET_SWEEP('SMIR',0,0,79,110,0,0,1)
2000/305 20:21:52 ATC OA15: SDSM Open
2000/305 22:00:45 ATC OA16: SDSM Screened
2000/305 23:00:00 ATC Set Black Body Duty Cycle to 'FULL'
2000/305 23:00:30 ATC Set Black Body Temperature to '315K'

2000/306 06:00:00 ATC Set Black Body Duty Cycle to 'THIRD'
2000/306 06:00:30 ATC Set Black Body Temperature to '270K'

2000/307 04:00:30 ATC Set Black Body Temperature to '290K'
2000/307 19:34 Real-Time Disable SRCA TMONs 66 and 67 processing As per B-Side Transition CAM discussion and submitted Terra Engineering Work Order. proc: FS1_EXEC_TMON_GRP_PROC(0,66,67)

None

This Week's Scheduled MODIS Activities Not Completed:

None

Upcoming MODIS Events:

2000/308 21:44:49-22:42:20 ATC OA-23: SRCA Full Spatial

2000/309 06:14:00-06:31:00 ATC Formatter Day Rate Science Collection during Nadir Ground Track Night. (3+ Granules)
2000/309 21:39:13-21:41:44 ATC OA-27: PV ECAL
2000/309 21:44:13-21:48:44 ATC OA-28: PC ECAL

None

None

None

None

None

None

Maneuvers:

The next MODIS Roll Maneuver is schedule for DOY 2000/320 22:41:59 to 22:58:59 for a roll angle of -11.5506 degrees.

MODIS Anomalies:

Continued monitoring for formatter errors and loss of cooler margin.

Attached to this report is a spreadsheet listing the times, addresses, formatter temperature, satellite ground track, and space craft day/night position for a select number of the formatter events that have occurred from DOY 2000/256 to DOY 2000/304. The final event count before the B-Side Transition was 2702. Due to the high number of recent events, not all details have been updated in the anomaly log.

General Instrument Comments:

MODIS is in Science Mode on the B-side with the SVD and NAD open, operating with the Formatter Resolution Flight Software Patches (FRFSP). No new events have been witnessed by the FRFSP since the B-Side Transition on DOY 304.

MODIS Telemetry Trends:

The Radiative Cooler intermediate stage temperature has slowly been increasing since approximately DOY 2000/240. During this time the LWIR focal plane heater margin has been decreasing. The IOT is continuing to trend these telemetry mnemonics.

Non-MODIS Significant Events:

The Delta-V Maneuver was performed successfully.

No additional problems have been witnessed from the SFE-A since it was restarted on DOY 301.

As a reminder, the duration that the SFE-A was disabled: 2000/300 14:05:02 to 2000/301 14:06:19 (Just over 24 hours). NO Science Data will be available for this time period. All Science Data in this time frame has been permanently lost.

Limited Life Item Status:

SRCA 10W Lamp #1: 173.5 of 500 hours SRCA 10W Lamp #2: 135.9 of 500 hours SRCA 10W Lamp #3: 145.1 of 500 hours SRCA 10W Lamp #4: 61.5 of 500 hours

SRCA 1W Lamp #1: 556.1 of 4000 hours SRCA 1W Lamp #2: 276.3 of 4000 hours

Solar Diffuser Door: 1453 of 3022 Movements Nadir Aperture Door: 532 of 1316 Movements Space View Door: 437 of 1316 Movements

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Last Update: Wednesday, 15-Jan-2003 14:43:10 EST