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Mission Operations Days: 2001/146 to 2001/152
May 26, 2001 00:00:00 GMT to June 01, 2001 00:00:00 GMT

Terra Spacecraft and MODIS Instrument Status:

Terra (AM-1) is in Normal Ops Mode with SSR supersets 30 and 31 unallocated
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 + 2 set of patches
  • FR Error Counting and Statistics (2 patches)
  • FR Band 5 Gain Change (20 commands)
Inhibit Ids Set None Nominal
TMONs Enabled 68 Nominal

This Week's Completed MODIS Activities:

Friday, May 25, 2001


Saturday, May 26, 2001


Sunday, May 27, 2001


Monday, May 28, 2001


Tuesday, May 29, 2001


Wednesday, May 30, 2001

2001/150 20:38:23 ATC OA-16: SD/SDSM Screened
2001/150 22:17:15 ATC OA-15: SD/SDSM Open

Thursday, May 31, 2001


Friday, June 01, 2001

2001/152 15:07:59 – 15:14:19 Real-Time LWIR Vdet Sweep, Itwk =79, Vdet = 160-224 with 8 steps of 8 counts for 30 seconds each
2001/152 15:15:36 Real-Time Set LWIR Itwk/Vdet to 79/185
2001/152 15:49:48 Real-Time Turn off LWIR FPA heater
2001/152 15:50:53 Real-Time Turn on SMIR FPA heater
2001/152 17:50:53 Real-Time Turn off SMIR FPA heater
2001/152 17:51:49 Real-Time Turn on LWIR FPA heater

This Week's Scheduled MODIS Activities Not Completed:


Upcoming MODIS Events:

Saturday, June 2, 2001


Sunday, June 3, 2001


Monday, June 4, 2001


Tuesday, June 5, 2001


Wednesday, June 6, 2001


Thursday, June 7, 2001


Friday, June 8, 2001


Based on the current operations plan, calibration activities for June will include an SRCA Full Radiometric, PV Ecal, PC Ecal, and weekly SD/SDSM calibrations.


The next MODIS Lunar Roll Maneuver is scheduled for June 10, 2001. The roll angle is - 20.0293 degrees with a data collection from 2001/161-23:07:25 to 2001/161-23:13:55.

MODIS Anomalies:


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:

Telemetry is trending nominally. The amount of power required by the focal plane heater to maintain 83.0K is still slowly decreasing, although the spacecraft is currently near the minimum absolute solar beta angle for the year.

Non-MODIS Significant Events:

MOPITT Anomaly:

The MOPITT team is still working to recover their instrument to science operations.

Limited Life Item Status:

SRCA 10W Lamp #1: 186.0 of 500 hours
SRCA 10W Lamp #2: 142.9 of 500 hours
SRCA 10W Lamp #3: 152.1 of 500 hours
SRCA 10W Lamp #4: 61.5 of 500 hours

SRCA 1W Lamp #1: 557.5 of 4000 hours
SRCA 1W Lamp #2: 276.3 of 4000 hours

Solar Diffuser Door: 1621 of 3022 Movements
Nadir Aperture Door: 532 of 1316 Movements
Space View Door: 437 of 1316 Movements