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Mission Operations Days: 2001/041 to 2001/047
February 10, 2001 00:00:00 GMT to February 16, 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
Component State(s) Comment
Blackbody A Off; B On (290 K) Nominal
Calibration Electronics A Off; B On Nominal
Control Processor A Off; B On Nominal
Nadir Door Unlatched, Open Nominal
Space View Door Unlatched, Open Nominal
Solar Diffuser Door Unlatched, Closed Nominal
FDDI Formatter A Off; B On Nominal
FDDI Port A On; B Off Nominal
FIFO Memory #1 & #2 Off; #3 & #4 On Nominal
Format Processor A Off; B On Nominal
Power Supplies #1 Off; #2 On Nominal
PV VIS FPA A Off; B On Nominal
PV NIR FPA A Off; B On Nominal
PV SMIR FPA A Off; B On Nominal
PV LWIR FPA A Off; B On Nominal
PC LWIR FPA A Off; B On Nominal
RC Outgas Heaters All Off (CS, IS, OS) Nominal
RC LWIR FPA Heater On (83 K) Nominal
RC SMIR FPA Heater Off Nominal
Scan Assembly A Off; B On Nominal
SDSM A Off; B Off Nominal
SRCA A Off; B Off Nominal
PS1 Survival Heater Enabled Nominal
PS2 Survival Heater Enabled Nominal
Timing Generator A Off; B On Nominal
Flight Software Rev BD + 1 set of patches
  • FR Error Counting and Statistics (2 patches)
Inhibit Ids Set None Nominal
TMONs Enabled 68 Nominal

This Week’s Completed MODIS Activities:

Saturday, February 10, 2001


Sunday, February 11, 2001


Monday, February 12, 2001

Lunar Roll Maneuver (-7.68 degree roll)
2001/043 06:07:12 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
2001/043 07:27:23 FR to Day Rate
2001/043 07:27:25 SCIABNORM flag set
2001/043 07:27:27 FR PCDCR set
2001/043 07:27:29 FR PVDCR set
2001/043 07:27:31 FR Sector Rotation (-3072)
SV Lunar Viewing
2001/043 07:34:01 FR Sector Rotation (0 - nominal)
2001/043 07:34:03 FR PVDCR cleared
2001/043 07:34:05 FR PCDCR cleared
2001/043 07:34:07 SCIABNORM flag cleared
2001/043 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 07:55:12 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

2001/045 21:00:39 ATC OA-16: SDSM Screened
2001/045 22:39:31 ATC OA-15: SDSM Open

Thursday, February 15, 2001


Friday, February 16, 2001


This Week's Scheduled MODIS Activities Not Completed:


Upcoming MODIS Events:

Saturday, February 17, 2001


Sunday, February 18, 2001


Monday, February 19, 2001


Tuesday, February 20, 2001


Wednesday, February 21, 2001


Thursday, February 22, 2001


Friday, February 23, 2001



The MODIS Lunar Calibration Roll Maneuver on 2001/043 (February 12th) transpired under nominal conditions.

No future maneuvers are planned at present.

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: 1531 of 3022 Movements
Nadir Aperture Door: 532 of 1316 Movements
Space View Door: 437 of 1316 Movements