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Mission Operations Days: 2001/202 to 2001/208
July 21, 2001 00:00:00 GMT to July 27, 2001 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 Off; B On Nominal
Flight Software Rev BD + 1 set of patches
  • FR Error Counting and Statistics (2 patches)
Inhibit Ids Set None Nominal
TMON 66 (SRCA A) Disabled Nominal
TMON 67 (SRCA B) Disabled Nominal
TMON 68 (FIFO) Enabled Nominal
TMON 69 (EPS Current) Disabled Nominal

This Week's Completed MODIS Activities:

Saturday, July 21, 2001


Sunday, July 22, 2001


Monday, July 23, 2001


Tuesday, July 24, 2001


Wednesday, July 25, 2001

2001/206 18:09:12-18:20:40 ATC OA-15: SD/SDSM Open
2001/206 19:48:06-19:59:34 ATC OA-16: SD/SDSM Screened

Thursday, July 26, 2001


Friday, July 27, 2001

An additional 20+ minutes for FR Day Rate was collected during S/C Ground Track Night.
2001/208 14:00:09-14:28:00 ATC FR Night Rate (21:38 minutes less than normal)
2001/208 14:28:00-15:39:02 ATC FR Day Rate (21:38 minutes more than normal)

This Week's Scheduled MODIS Activities Not Completed:


Upcoming MODIS Events:

During the upcoming week, it is planned to collect an extra 20 minutes of DAY rate data while the spacecraft is over the night side of the Earth, using SMIR Itwk/Vdet of 79/110 (to be restored to current 79/190 values after data collection). Solar Diffuser calibrations will likely occur on Wednesday, although the precise times have not yet been determined.

Additionally, the Band5 Gains will be decreased by 25% (returning them to the values they were at prior to the PS2 Shutdown Anomaly). This will be done as time permits on either Monday or Tuesday.

Friday, July 27, 2001


Saturday, July 28, 2001


Sunday, July 29, 2001


Monday, July 30, 2001


Tuesday, July 31, 2001


Wednesday, August 1, 2001


Thursday, August 2, 2001


Friday, August 3, 2001



The next MODIS Lunar Roll Calibration is scheduled for August 9, 2001 ( DOY 221 ) from 05:24:35 to 05:31:05. A second lunar calibration will be performed without a roll maneuver on the same day from 20:23:37 to 20:30:07. During the second roll, the SMIR Itwk/Vdet will be temporarily set to 70/110.

MODIS Anomalies:

Investigation into the PS2 shutdown anomaly is still underway. An anomaly report is expected by the end of this month.

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 (FRFSP).

MODIS Telemetry Trends:

Trending has resumed with the instrument on the A-side. All appears nominal at this time.

Non-MODIS Significant Events:


Limited Life Item Status:

SRCA 10W Lamp #1: 189.0 of 500 hours
SRCA 10W Lamp #2: 144.7 of 500 hours
SRCA 10W Lamp #3: 153.9 of 500 hours
SRCA 10W Lamp #4: 61.5 of 500 hours

SRCA 1W Lamp #1: 557.9 of 4000 hours
SRCA 1W Lamp #2: 276.3 of 4000 hours

Solar Diffuser Door: 1657 of 3022 Movements
Nadir Aperture Door: 532 of 1316 Movements
Space View Door: 437 of 1316 Movements