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Mission Operations Days: 2001/076 to 2001/082
March 17, 2001 00:00:00 GMT to March 23, 2001 00:00:00 GMT

Terra Spacecraft and MODIS Instrument Status:

Terra (AM-1) is in Normal Ops Mode
MODIS is in Science Mode - B Side
BlackbodyA Off; B On (290 K)Nominal
Calibration ElectronicsA Off; B OnNominal
Control ProcessorA Off; B OnNominal
Nadir DoorUnlatched, OpenNominal
Space View DoorUnlatched, OpenNominal
Solar Diffuser DoorUnlatched, ClosedNominal
FDDI FormatterA Off; B OnNominal
FDDI PortA On; B OffNominal
FIFO Memory#1 & #2 Off; #3 & #4 OnNominal
Format ProcessorA Off; B OnNominal
Power Supplies#1 Off; #2 OnNominal
PV VIS FPAA Off; B OnNominal
PV NIR FPAA Off; B OnNominal
PV SMIR FPAA Off; B OnNominal
PV LWIR FPAA Off; B OnNominal
PC LWIR FPAA Off; B OnNominal
RC Outgas HeatersAll Off (CS, IS, OS)Nominal
RC LWIR FPA HeaterOn (83 K)Nominal
RC SMIR FPA HeaterOffNominal
Scan AssemblyA Off; B OnNominal
SDSMA Off; B OffNominal
SRCAA Off; B OffNominal
PS1 Survival HeaterEnabledNominal
PS2 Survival HeaterEnabledNominal
Timing GeneratorA Off; B OnNominal
Flight SoftwareRev BD + 1 set of patches
  • FR Error Counting and Statistics (2 patches)
Inhibit Ids SetNoneNominal
TMONs Enabled68Nominal

This Week’s Completed MODIS Activities:

Saturday, March 17, 2001


Sunday, March 18, 2001


Monday, March 19, 2001


Tuesday, March 20, 2001


Wednesday, March 21, 2001

2001/080 11:29:25-11:40:53 ATC OA15: SD/SDSM Open
2001/080 13:08:17-13:19:45 ATC OA16: SD/SDSM Screened

Thursday, March 22, 2001


Friday, March 23, 2001


This Week's Scheduled MODIS Activities Not Completed:


Upcoming MODIS Events:

Saturday, March 24, 2001


Sunday, March 25, 2001


Monday, March 26, 2001


Tuesday, March 27, 2001


Wednesday, March 28, 2001


Thursday, March 29, 2001


Friday, March 30, 2001



There will be no MODIS roll maneuver in April because the roll angle would have been too great.

The next roll maneuver will be scheduled in May.

MODIS Anomalies:

There appears to be a problem processing the science data collected during the SRCA activities on Friday, March 2nd, 2001 (day 061). Specifically, this may be related to the change in sector sizes for the Solar Diffuser and SRCA. If this is the cause, it will affect data from 061/14:06:30 to 061/18:21:56 GMT. This problem is not yet well understood.

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).

MODIS Telemetry Trends:

Temperature trends are correlating with the solar beta angle.

Non-MODIS Significant Events:


Limited Life Item Status:

SRCA 10W Lamp #1: 182.5 of 500 hours
SRCA 10W Lamp #2: 141.1 of 500 hours
SRCA 10W Lamp #3: 150.3 of 500 hours
SRCA 10W Lamp #4: 61.5 of 500 hours

SRCA 1W Lamp #1: 557.2 of 4000 hours
SRCA 1W Lamp #2: 276.3 of 4000 hours

Solar Diffuser Door: 1567 of 3022 Movements
Nadir Aperture Door: 532 of 1316 Movements
Space View Door: 437 of 1316 Movements