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am1weekly_2001-090_2001-096

Mission Operations Days: 2001/090 to 2001/096
March 31, 2001 00:00:00 GMT to April 06, 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 31, 2001

2001/090 20:19:36 ATC OA-16: SD/SDSM Screened
2001/090 21:58:28 ATC OA-15: SD/SDSM Open

Sunday, April 1, 2001

None

Monday, April 2, 2001

None

Tuesday, April 3, 2001

None

Wednesday, April 4, 2001

2001/094 21:33:08 ATC OA-16: SD/SDSM Screened
2001/094 23:12:01 ATC OA-15: SD/SDSM Open

Thursday, April 5, 2001

2001/095 17:50:15 Real-time Spacecraft attitude configuration change for drag make-up maneuver. Begin possible slight attitude disturbances.
2001/095 19:32:30 Real-time Spacecraft attitude configuration change for drag make-up maneuver. Return to nominal pointing accuracy.

This Week's Scheduled MODIS Activities Not Completed:

None

Upcoming MODIS Events:

Friday, April 6, 2001

2001/096 23:43:10 – 01:22:33 ATC OA-18: SDSM Background radiation collection

Saturday, April 7, 2001

2001/097 11:58:39 – 13:38:02 ATC OA-18: SDSM Background radiation collection

Sunday, April 8, 2001

None

Monday, April 9, 2001

2001/099 14:28:37 – 15:20:16 ATC OA-22: SRCA Full Spectral Part 1B
2001/099 16:20:24 – 16:55:09 ATC OA-22: SRCA Full Spectral Part 2A
2001/099 17:46:07 – 18:37:23 ATC OA-22: SRCA Full Spectral Part 3B
2001/099 19:38:10 – 20:16:08 ATC OA-22: SRCA Full Spectral Part 4A

Tuesday, April 10, 2001

None

Wednesday, April 11, 2001

2001/101 21:38:34 ATC OA-16: SD/SDSM Screened
2001/101 22:29:57 – 23:03:30 ATC OA-19: SRCA Full Radiometric
2001/101 23:17:27 ATC OA-15: SD/SDSM Open

Thursday, April 12, 2001

None

Friday, April 13, 2001

None

In addition:

Blackbody calibration: stepped to 315K likely Thursday or Friday (12th/13th)
Electronics calibrations (PV & PC) will be scheduled for the week of the 16th.
A new set of SRCA cross-talk measurements are being planned for later this month and will use memory load patches to change the size of the SRCA sector from 10 frames to 55 frames in the same manner as was done on March 2, 2001.

Maneuvers:

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

Next roll maneuver will be scheduled in May.

A drag make-up maneuver (DMU) was executed on April 5th (Day 2001/095). Due to high solar flux levels, another DMU may be needed within a few weeks.

MODIS Anomalies:

None.

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:

Nothing new to report.

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: 1579 of 3022 Movements
Nadir Aperture Door: 532 of 1316 Movements
Space View Door: 437 of 1316 Movements