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Mission Operations Days: 2000/246 to 2000/252
September 02, 2000 00:00:00 GMT to September 08, 2000 00:00:00 GMT

Terra Spacecraft and MODIS Instrument Status:

Terra (AM-1) is in Normal Ops Mode
MODIS is in Science Mode - A Side
BlackbodyA On (290 K); B OffNominal
Calibration ElectronicsA On; B OffNominal
Control ProcessorA On; B OffNominal
Nadir DoorUnlatched, OpenNominal
Space View DoorUnlatched, OpenNominal
Solar Diffuser DoorUnlatched, ClosedNominal
FDDI FormatterA On; B OffNominal
FDDI PortA On; B OffNominal
FIFO Memory#1 & #2 On; #3 & #4 OffNominal
Format ProcessorA On; B OffNominal
Power Supplies#1 On, #2 OffNominal
PV VIS FPAA On; B OffNominal
PV NIR FPAA On; B OffNominal
PV SMIR FPAA On; B OffNominal
PV LWIR FPAA On; B OffNominal
PC LWIR FPAA On; B OffNominal
RC Outgas HeatersAll Off (CS, IS, OS)Nominal
RC LWIR FPA HeaterOn (83 K)Nominal
RC SMIR FPA HeaterOffNominal
Scan AssemblyA On; B OffNominal
SDSMA Off; B OffNominal
SRCAA Off; B OffNominal
PS1 Survival HeaterEnabledNominal
PS2 Survival HeaterEnabledNominal
Timing GeneratorA On; B OffNominal
Flight SoftwareRev BD + 1 set of patches
  • FR Error Counting and Statistics (2 patches)
Inhibit Ids SetNoneNominal
TMONs Enabled66, 67, 68Nominal

This Week’s Completed MODIS Activities:

Saturday, September 2, 2000


Sunday, September 3, 2000


Monday, September 4, 2000


Tuesday, September 5, 2000


Wednesday, September 6, 2000


Thursday, September 7, 2000

2000/251 20:55:18 ATC OA15 - SDSM Open
2000/251 22:34:11 ATC OA16 - SDSM Screened

Friday, September 8, 2000

2000/252 13:37 Real-Time SMIR VDET/ITWK to 79/110
2000/252 13:42:49 ATC SRCA 10W Spatial: using Spectral Slit with EA sector rotation and delay stepping (activity MOD_OA25_10W_SPAT_SLT_SECT_A)
2000/252 15:21:42 ATC SRCA 1W Spatial: using Along Scan Reticle with EA sector rotation and delay stepping (activity MOD_OA25_SRCA_1W_SPAT_SECT_A)
2000/252 16:12 Real-Time SMIR VDET/ITWK to 110/226 (Nominal Operations)

This Week's Scheduled MODIS Activities Not Completed:


Upcoming MODIS Events:

Saturday, September 9, 2000


Sunday, September 10, 2000


Monday, September 11, 2000


Tuesday, September 12, 2000

2000/256 13:53 Real-Time SMIR VDET/ITWK to 79/110
2000/256 14:38:44 ATC OA16 - SDSM Double Screened
2000/256 16:17:38 ATC OA15 - SDSM Double Open
2000/256 16:25 Real-Time SMIR VDET/ITWK to 110/226 (Nominal Operations)

The two day passes for the SD/SDSM activities fall across the central and western Atlantic. This should keep us clear of Africa, Hawaii and Alaska for Day and Night Ground Tracks for both the activities and the off-nominal VDET/ITWK values.

2000/256 18:12 Real-Time Set new Gain Values for Band 14H (1-10), and Band 25 (1).

Wednesday, September 13, 2000


Thursday, September 14, 2000


Friday, September 15, 2000



The next roll maneuver to view the moon through the space view port is scheduled for September 18th (2000-262, 05:29:56 - 05:16:44 GMT).

MODIS Anomalies:

The formatter anomaly investigation has continued At approximately 8:00pm EDT August 19th, the formatter errors ceased occurring. There are currently 9 unique error addresses recorded by the Formatter, and a total error count of 2183. The A-Side Formatter is operating at approx. - 0.3C.

The LWIR CFPA temperature control has been restored. The temperature is holding within +/- 0.02K of the set-point of 83K. The LWIR CFPA heater voltage is cycling with orbital variations of +/- 0.5V around 6.0V.

MCST is establishing automatic long term trending and critical telemetry point monitoring to track the lasting results of the two recent anomaly resolutions.

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.

MODIS Telemetry Trends:

See MODIS Anomalies above.

Non-MODIS Significant Events:


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: 1405 of 3022 Movements
Nadir Aperture Door: 532 of 1316 Movements
Space View Door: 437 of 1316 Movements