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am1weekly_2000-267_2000-273

Mission Operations Days: 2000/267 to 2000/273
September 23, 2000 00:00:00 GMT to September 29, 2000 00:00:00 GMT


Terra Spacecraft and MODIS Instrument Status:

Terra (AM-1) is in Normal Ops Mode
MODIS is in Science Mode - A Side
Component State(s) Comment
Blackbody A On (290 K); B Off Nominal
Calibration Electronics A On; B Off Nominal
Control Processor A On; B Off Nominal
Nadir Door Unlatched, Open Nominal
Space View Door Unlatched, Open Nominal
Solar Diffuser Door Unlatched, Closed Nominal
FDDI Formatter A On; B Off Nominal
FDDI Port A On; B Off Nominal
FIFO Memory #1 & #2 On; #3 & #4 Off Nominal
Format Processor A On; B Off Nominal
Power Supplies #1 On, #2 Off Nominal
PV VIS FPA A On; B Off Nominal
PV NIR FPA A On; B Off Nominal
PV SMIR FPA A On; B Off Nominal
PV LWIR FPA A On; B Off Nominal
PC LWIR FPA A On; B Off 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 On; B Off 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 On; B Off Nominal
Flight Software Rev BD + 3 sets of patches
  • FR Error Counting and Statistics (2 patches)
  • FR Band 14H Gain Change (10 commands)
  • FR Band 25 Gain Change (Detector #1) (1 command)
Nominal
Inhibit Ids Set None Nominal
TMONs Enabled 66, 67, 68 Nominal

This Week’s Completed MODIS Activities:

Saturday, September 23, 2000

None

Sunday, September 24, 2000

None

Monday, September 25, 2000

None

Tuesday, September 16, 2000

None

Wednesday, September 27, 2000

None

Thursday, September 28, 2000

None

This Week's Scheduled MODIS Activities Not Completed:

None

Upcoming MODIS Events:

Friday, September 29, 2000

2000/273 20:19:27 ATC Load OA-15: SD/SDSM Open
2000/273 21:58:20 ATC Load OA-16: SD/SDSM Screened

Saturday, September 30, 2000

None

Sunday, October 1, 2000

None

Monday, October 2, 2000

None

Tuesday, October 3, 2000

None

Wednesday, October 4, 2000

2000/278 07:27:08 ATC Load OA-15: SD/SDSM Open
2000/278 09:06:01 ATC Load OA-16: SD/SDSM Screened

Thursday, October 5, 2000

None

Friday, October 6, 2000

None

Maneuvers:

The next Drag Makeup Maneuver is planned for October 4th.
The next MODIS Lunar Roll Maneuver is planned for October 17th.

MODIS Anomalies:

Continued monitoring for formatter errors and loss of cooler margin.

Five formatter errors have been caught by the flight software patch recently, their event times are:

2000/256 14:12:42
2000/271 12:33:09
2000/272 07:06:51
2000/273 04:32:03
2000/273 06:00:15

The address of each of these errors have been seen previously. The MODIS IOT is currently trending telemetry, orbital position, and other internal/external spacecraft events in an attempt to find the cause of these occasional formatter errors.

General Instrument Comments:

MODIS is in Science Mode on the A-side with the SVD and NAD open, operating with the Formatter Resolution Flight Software Patches.

MODIS Telemetry Trends:

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

Non-MODIS Significant Events:

None

Limited Life Item Status:

SRCA 10W Lamp #1: 173.5 of 500 hours
SRCA 10W Lamp #2: 135.9 of 500 hours
SRCA 10W Lamp #3: 145.1 of 500 hours
SRCA 10W Lamp #4: 61.5 of 500 hours

SRCA 1W Lamp #1: 556.1 of 4000 hours
SRCA 1W Lamp #2: 276.3 of 4000 hours

Solar Diffuser Door: 1417 of 3022 Movements
Nadir Aperture Door: 532 of 1316 Movements
Space View Door: 437 of 1316 Movements