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Mission Operations Days: 2000/176 to 2000/182
June 24, 2000 00:00:00 GMT to June 30, 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
MODIS has an anomaly with the LWIR focal plane. See description below.
BlackbodyA On (290 K); B OffNominal
Calibration ElectronicsA On; B OffNominal
Control ProcessorA On; B OffNominal
Nadir DoorUnlatched, OpenNominal
Space View DoorUnlatched, OpenNominal
Solar Diffuser DoorUnlatched, ClosedNominal
FDDI FormatterA On; B OffNominal
FDDI PortA On; B OffNominal
FIFO Memory#1 & #2 On; #3 & #4 OffNominal
Format ProcessorA On; B OffNominal
Power Supplies#1 On, #2 OffNominal
PV VIS FPAA On; B OffNominal
PV NIR FPAA On; B OffNominal
PV SMIR FPAA On; B OffNominal
PV LWIR FPAA On; B OffNominal
PC LWIR FPAA On; B OffNominal
RC Outgas HeatersAll Off (CS, IS, OS)Nominal
RC LWIR FPA HeaterOn (83 K)Nominal
RC SMIR FPA HeaterOffNominal
Scan AssemblyA On; B OffNominal
SDSMA Off; B OffNominal
SRCAA Off; B OffNominal
PS1 Survival HeaterEnabledNominal
PS2 Survival HeaterEnabledNominal
Timing GeneratorA On; B OffNominal
Flight SoftwareRev BD + 1 set of patches
  • FR Band 14H Gain Change (10 commands)
Inhibit Ids SetNoneNominal
TMONs Enabled66, 67Nominal

This Week’s Completed MODIS Activities:

Saturday, June 27, 2000


Sunday, June 25, 2000


Monday, June 26, 2000

2000/178 20:02:00 ATC - Blackbody to 270K

Tuesday, June 27, 2000

2000/179 14:00:00 ATC Blackbody to 315K
2000/179 14:29:05 Real-time Set Blackbody duty cycle to 100%
2000/179 21:00:00 ATC Blackbody to 270K
2000/179 21:20:49 Real-time Set Blackbody duty cycle to 33%
2000/179 21:21:30 Real-time Cleared the Inhibit Ids 33 and 53 for SD/SDSM activities.

Wednesday, June 28, 2000

2000/180 19:00:00 ATC Blackbody to 290K

Thursday, June 29, 2000


Friday, June 30, 2000


This Week's Scheduled MODIS Activities Not Completed:


Upcoming MODIS Events:

Saturday, July 1, 2000


Sunday, July 2, 2000


Monday, July 3, 2000

2000/185 12:01:02 ATC OA19 SRCA Full Radiometric

Tuesday, July 4, 2000


Wednesday, July 5, 2000

2000/187 11:48:43 ATC OA23 SRCA Full Spatial
2000/187 12:00:00 ATC - Blackbody to 270K

Thursday, July 6, 2000

2000/188 06:00:00 ATC Blackbody to 280K
2000/188 10:00:00 ATC Blackbody to 285K
2000/188 12:00:00 ATC Blackbody to 290K
2000/188 14:00:?? Real-time Set Blackbody duty cycle to 100%
2000/188 14:00:00 ATC Blackbody to 295K
2000/188 16:00:00 ATC Blackbody to 300K
2000/188 18:00:00 ATC Blackbody to 315K
2000/188 20:05:00 ATC Blackbody to 270K
2000/188 20:00:?? Real-time Set Blackbody duty cycle to 33%

Friday, July 7, 2000

2000/189 08:15:38 ATC OA22 SRCA Full Spectral, 30W part I
2000/189 10:10:25 ATC OA22 SRCA Full Spectral, 30W part II
2000/189 11:32:52 ATC OA22 SRCA Full Spectral, 10W part I
2000/189 14:06:09 ATC OA22 SRCA Full Spectral, 10W part II
2000/189 19:00:00 ATC Blackbody to 290K


Friday, July 21, 2000 - MODIS Roll Maneuver (2000/203/12:07:22 – 12:25:24)

MODIS Anomalies:

The Radiative Cooler has negative margin, therefore the cold focal planes are no longer under thermal control. This affects bands 5, 6, 7, and 20-36. Analysis is underway. Solar Diffuser Door operations are suspended during this analysis.

General Instrument Comments:

MODIS is in Science Mode on the A-side with the SVD and NAD open.

MODIS Telemetry Trends:

See MODIS Anomalies section.

Non-MODIS Significant Events:

Data processing by EDOS is currently running at a "degraded level". For a detailed summary of the events that have affected their products, view the EOS System Status web page ( and select the EDOS summary link at the top of the page. A key item to note is from day 6/27/2000 at 12:11:19 PM: " The second major issue is the amount of data that EDOS is receiving since ASTER has been fully turned on." With the new, higher data output of ASTER, even less "spare" time will be available to EDOS for the processing of backlogged or reprocessing of data.

Limited Life Item Status:

SRCA 10W Lamp #1: 167.2 of 500 hours
SRCA 10W Lamp #2: 132.7 of 500 hours
SRCA 10W Lamp #3: 141.9 of 500 hours
SRCA 10W Lamp #4: 61.5 of 500 hours

SRCA 1W Lamp #1: 555.1 of 4000 hours
SRCA 1W Lamp #2: 276.3 of 4000 hours

Solar Diffuser Door: 1381 of 3022 Movements
Nadir Aperture Door: 532 of 1316 Movements
Space View Door: 437 of 1316 Movements