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Mission Operations Days: 2001/034 to 2001/040
February 03, 2001 00:00:00 GMT to February 09, 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, February 03, 2001


Sunday, February 04, 2001


Monday, February 05, 2001


Tuesday, February 06, 2001


Wednesday, February 07, 2001


Thursday, February 08, 2001

2001/039 15:02:55 ATC OA-16: SDSM Screened
2001/039 15:50:51 - 16:24:24 ATC OA-19: SRCA Full Radiometric
2001/039 16:41:48 ATC OA-15: SDSM Open

Friday, February 09, 2001

2001/040 14:52:39 - 15:44:18 ATC OA-22: SRCA Full Spectral (Part 1)
2001/040 16:48:22 - 17:23:07 ATC OA-22: SRCA Full Spectral (Part 2)
2001/040 18:10:24 - 19:01:40 ATC OA-22: SRCA Full Spectral (Part 3)
2001/040 20:04:25 - 20:42:23 ATC OA-22: SRCA Full Spectral (Part 4)

This Week's Scheduled MODIS Activities Not Completed:


Upcoming MODIS Events:

Saturday, February 10, 2001


Sunday, February 11, 2001


Monday, February 12, 2001

MODIS Lunar Calibration Roll Maneuver
2001/043 06:05:00 - 06:25:00 RT FOT Procedure: ADC_IRU_TO_HI_RATE
2001/043 07:16:18 ATC FR to Night Rate 00:03:23 early roll compensation
2001/043 07:22:57 ATC S/C begins slew to Roll angle of –7.68 degrees
2001/043 07:27:27 ATC S/C completed slew to Roll angle of –7.68 degrees
2001/043 07:22:57 - 07:27:21 ATC SCIABNORM flag set
2001/043 07:27:23 - 07:34:09 MODIS Roll Activity
07:27:23 FR to Day Rate
07:27:25 SCIABNORM flag set
07:27:27 FR PCDCR set
07:27:29 FR PVDCR set
07:27:31 FR Sector Rotation (-3072)
SV Lunar Viewing
07:34:01 FR Sector Rotation (0 - nominal)
07:34:03 FR PVDCR cleared
07:34:05 FR PCDCR cleared
07:34:07 SCIABNORM flag cleared
07:34:09 FR to Night Rate
2001/043 07:34:11 - 07:37:55 SCIABNORM flag set
2001/043 07:34:31 ATC S/C begins slew to nominal orientation degrees
2001/043 07:37:55 ATC S/C completed slew to nominal orientation degrees
2001/043 07:49:55 - 08:14:55 RT FOT Procedure: ADC_IRU_TO_LO_RATE
2001/043 08:12:29 FR to Day Rate 00:03:23 late roll compensation
2001/043 09:47:59 - 14:44:37 Field Campaign Scheduling "Black-Out" No activities scheduled to support Field Campaign

Tuesday, February 13, 2001


Wednesday, February 14, 2001


Thursday, February 15, 2001


Friday, February 16, 2001



The next MODIS Lunar Calibration Roll Maneuver is planned for 2001/043, February 12th. See the scheduling notes above for details.

Note: the exact time the FOT takes the spacecraft out of fine pointing mode depends on the execution time of the related procedure (ADC_IRU_TO_HI_RATE). This will occur between 06:05 and 06:25. We won't know the precise time until it actually occurs. Later, the procedure (ADC_IRU_TO_LO_RATE) that returns the spacecraft to nominal fine pointing mode is performed. Once again, the precise time this occurs is not known, but it should occur during the scheduled 25-minute TDRSS contact. These exact times will appear in next week’s weekly report.

MODIS Anomalies:

No formatter anomalies have been detected since switching to B-side science operations. The MODIS IOT is continuing to monitor changes with the radiative cooler temperatures and focal plane power.

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 2000/304.

MODIS Telemetry Trends:

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

Temperature trends are correlating with the solar beta angle. This includes a steadying of the intermediate stage outgas temperature. This temperature is expected to increase again when the beta angle gets smaller.

Non-MODIS Significant Events:


Limited Life Item Status:

SRCA 10W Lamp #1: 181.7 of 500 hours
SRCA 10W Lamp #2: 140.5 of 500 hours
SRCA 10W Lamp #3: 149.7 of 500 hours
SRCA 10W Lamp #4: 61.5 of 500 hours

SRCA 1W Lamp #1: 556.7 of 4000 hours
SRCA 1W Lamp #2: 276.3 of 4000 hours

Solar Diffuser Door: 1525 of 3022 Movements
Nadir Aperture Door: 532 of 1316 Movements
Space View Door: 437 of 1316 Movements