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am1weekly_2001-069_2001-075

Mission Operations Days: 2001/069 to 2001/075
March 10, 2001 00:00:00 GMT to March 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
ComponentState(s)Comment
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)
Nominal
Inhibit Ids SetNoneNominal
TMONs Enabled68Nominal

This Week’s Completed MODIS Activities:

Saturday, March 10, 2001

None

Sunday, March 11, 2001

None

Monday, March 12, 2001

None

Tuesday, March 13, 2001

Lunar Roll Maneuver (-16.512 degree roll)
2001/072 20:07:00 First attitude disturbance due to config. change for maneuver
2001/072 21:30:51 ATC Move Formatter to Night ahead by 3:23 to ensure 50/50 day/night
2001/072 21:32:52 FOT ATC commanding: Begin slew to –16.512 degrees
2001/072 21:40:14 ATC Set Formatter to Day Rate
2001/072 21:40:16 ATC Set SCIABNORM Flag to ABNORM
2001/072 21:40:18 ATC PC DC Restore to OFF
2001/072 21:40:20 ATC PV DC Restore to OFF
2001/072 21:40:22 ATC Sector Rotation to –3072 (EA to SV and OBCs)
2001/072 21:46:52 ATC Sector Rotation to Zero (Normal)
2001/072 21:46:54 ATC PV DC Restore to ON
2001/072 21:46:56 ATC PC DC Restore to ON
2001/072 21:46:58 ATC Set SCIABNORM Flag to NORM
2001/072 21:47:00 ATC Set Formatter to Night Rate
2001/072 21:54:40 FOT ATC commanding: Return to nominal attitude
2001/072 22:06:00 Final attitude disturbance due to config. change for maneuver
2001/072 22:27:01 ATC Move Formatter to Day later by 3.23 to ensure 50/50 day/night

Wednesday, March 14, 2001

2001/073 17:55:00 First attitude disturbance due to config. Change for maneuver.
2001/073 20:20:00 Final attitude disturbance due to config. Change for maneuver.
2001/073 21:21:00 ATC OA16: SDSM SCREENED
2001/073 22:08:48 – 22:42:21 ATC OA19: SRCA Full Radiometric
2001/073 22:56:05 ATC OA15: SDSM OPEN

Thursday, March 15, 2001

None

Friday, March 16, 2001

None

This Week's Scheduled MODIS Activities Not Completed:

None

Upcoming MODIS Events:

Saturday, March 17, 2001

None

Sunday, March 18, 2001

None

Monday, March 19, 2001

None

Tuesday, March 20, 2001

None

Wednesday, March 21, 2001

None

Thursday, March 22, 2001

None

Friday, March 23, 2001

None

Maneuvers:

Delta-V maneuver performed on TERRA from 073/17:55:00 – 073/20:20:00.

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:

None

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: 1561 of 3022 Movements
Nadir Aperture Door: 532 of 1316 Movements
Space View Door: 437 of 1316 Movements