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Mission Operations Days: 2000/267 to 2000/273
September 23, 2000 00:00:00 GMT to September 29, 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 + 3 sets of patches
  • FR Error Counting and Statistics (2 patches)
  • FR Band 14H Gain Change (10 commands)
  • FR Band 25 Gain Change (Detector #1) (1 command)
Inhibit Ids SetNoneNominal
TMONs Enabled66, 67, 68Nominal

This Week’s Completed MODIS Activities:

Saturday, September 23, 2000


Sunday, September 24, 2000


Monday, September 25, 2000


Tuesday, September 16, 2000


Wednesday, September 27, 2000


Thursday, September 28, 2000


This Week's Scheduled MODIS Activities Not Completed:


Upcoming MODIS Events:

Friday, September 29, 2000

2000/273 20:19:27 ATC Load OA-15: SD/SDSM Open
2000/273 21:58:20 ATC Load OA-16: SD/SDSM Screened

Saturday, September 30, 2000


Sunday, October 1, 2000


Monday, October 2, 2000


Tuesday, October 3, 2000


Wednesday, October 4, 2000

2000/278 07:27:08 ATC Load OA-15: SD/SDSM Open
2000/278 09:06:01 ATC Load OA-16: SD/SDSM Screened

Thursday, October 5, 2000


Friday, October 6, 2000



The next Drag Makeup Maneuver is planned for October 4th.
The next MODIS Lunar Roll Maneuver is planned for October 17th.

MODIS Anomalies:

Continued monitoring for formatter errors and loss of cooler margin.

Five formatter errors have been caught by the flight software patch recently, their event times are:

2000/256 14:12:42
2000/271 12:33:09
2000/272 07:06:51
2000/273 04:32:03
2000/273 06:00:15

The address of each of these errors have been seen previously. The MODIS IOT is currently trending telemetry, orbital position, and other internal/external spacecraft events in an attempt to find the cause of these occasional formatter errors.

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:

The Radiative Cooler intermediate stage temperature has slowly been increasing since approximately day 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:


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: 1417 of 3022 Movements
Nadir Aperture Door: 532 of 1316 Movements
Space View Door: 437 of 1316 Movements