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MODIS IOT Terra Weekly Report

Mission Operations Days: 2000/197 to 2000/203
July 14, 2000 20:00:00 GMT to July 21, 2000 20:00:00 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.
Component State(s) Comment
Blackbody A On (290 K); B Off Nominal
Calibration ElectronicsA 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 OffNominal
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 Off CFPA Anomaly Investigation
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 + 2 sets of patches
  • FR Band 14H Gain Change (10 commands)
  • FR Band 27 Gain Change (10 commands)
 Nominal
Inhibit Ids Set None Nominal
TMONs Enabled 66, 67 Nominal

This Week’s Completed MODIS Activities:

Saturday, July 15, 2000

None

Sunday, July 16, 2000

None

Monday, July 17, 2000

2000/199 17:45 Real-time Set SVD software step position to 4020
2000/199 17:46 Real-time Open SVD 100 steps further
2000/199 19:12 Real-time Dump Door table
2000/199 20:02:00 ATC - Blackbody to 270K
2000/199 20:15:40 – 21:36:44 == DATA LOSS due to hardware problem at White Sands (GSIF recorders down)

Tuesday, July 18, 2000

2000/200 14:00:00 ATC Blackbody to 315K
2000/200 14:04 Real-time Set Blackbody duty cycle to 100%
2000/200 21:00:00 ATC Blackbody to 270K
2000/200 21:00 Real-time Set Blackbody duty cycle to 33%

Wednesday, July 19, 2000

2000/201 19:00:00 ATC Blackbody to 290K

Thursday, July 20, 2000

None

Friday, July 21, 2000

MODIS Roll Maneuver Sequence
2000/203 11:57:18 ATC Load - Set Formatter to Night Rate 00:03:15 early (for 50/50 SSR buffer)
2000/203 12:14:00 ATC Load - Set Formatter to Day Rate (for Lunar Roll)
2000/203 12:14:02 ATC Load - Set SCIABNORM Flag to ABNORM
2000/203 12:14:04 ATC Load - PC DC Restore OFF
2000/203 12:14:06 ATC Load - PV DC Restore OFF
2000/203 12:14:08 ATC Load - Sector Rotation to -3072 (EA to SV and OBCs)
2000/203 12:19:38 ATC Load - Sector Rotation to 0 (Normal)
2000/203 12:19:40 ATC Load - PC DC Restore ON
2000/203 12:19:42 ATC Load - PV DC Restore ON
2000/203 12:19:44 ATC Load - Set SCIABNORM Flag to NORM
2000/203 12:19:46 ATC Load - Set Formatter to Night Rate (for Lunar Roll)
2000/203 12:50:01 ATC Load - Set Formatter to Day Rate 00:03:15 late (for 50/50 SSR buffer)

This Week's Scheduled MODIS Activities Not Completed:

None

Upcoming MODIS Events:

Saturday, July 22, 2000

MODIS Lunar View Sequence #1 (no roll)
2000/204 14:16:13 ATC Load - Set Formatter to Night Rate 00:03:15 early (for 50/50 SSR buffer)
2000/204 14:27:10 ATC Load - Set Formatter to Day Rate (for Lunar Roll)
2000/204 14:27:12 ATC Load - Set SCIABNORM Flag to ABNORM
2000/204 14:27:14 ATC Load - PC DC Restore OFF
2000/204 14:27:16 ATC Load - PV DC Restore OFF
2000/204 14:27:18 ATC Load - Sector Rotation to -3072 (EA to SV and OBCs)
2000/204 14:33:48 ATC Load - Sector Rotation to 0 (Normal)
2000/204 14:33:50 ATC Load - PC DC Restore ON
2000/204 14:33:52 ATC Load - PV DC Restore ON
2000/204 14:33:54 ATC Load - Set SCIABNORM Flag to NORM
2000/204 14:33:56 ATC Load - Set Formatter to Night Rate (for Lunar Roll)
2000/204 15:12:11 ATC Load - Set Formatter to Day Rate 00:03:15 late (for 50/50 SSR buffer)

Saturday, July 22, 2000

MODIS Lunar View Sequence #2 (no roll)
2000/204 15:55:07 ATC Load - Set Formatter to Night Rate 00:03:15 early (for 50/50 SSR buffer)
2000/204 16:05:02 ATC Load - Set Formatter to Day Rate (for Lunar Roll)
2000/204 16:05:04 ATC Load - Set SCIABNORM Flag to ABNORM
2000/204 16:05:06 ATC Load - PC DC Restore OFF
2000/204 16:05:08 ATC Load - PV DC Restore OFF
2000/204 16:05:10 ATC Load - Sector Rotation to -3072 (EA to SV and OBCs)
2000/204 16:11:40 ATC Load - Sector Rotation to 0 (Normal)
2000/204 16:11:42 ATC Load - PC DC Restore ON
2000/204 16:11:44 ATC Load - PV DC Restore ON
2000/204 16:11:46 ATC Load - Set SCIABNORM Flag to NORM
2000/204 16:11:48 ATC Load - Set Formatter to Night Rate (for Lunar Roll)
2000/204 16:51:05 ATC Load - Set Formatter to Day Rate 00:03:15 late (for 50/50 SSR buffer)

Sunday, July 23, 2000

None

Monday, July 24, 2000

2000/206 20:02:00 ATC - Blackbody to 270K

Tuesday, July 25, 2000

2000/207 14:00:00 ATC Blackbody to 315K
2000/207 14:?? Real-time Set Blackbody duty cycle to 100%
2000/207 21:00:00 ATC Blackbody to 270K
2000/207 21:?? Real-time Set Blackbody duty cycle to 33%

Wednesday, July 26 2000

2000/208 19:00:00 ATC Blackbody to 290K

Thursday, July 27, 2000

None

Friday, July 28, 2000

None

Maneuvers:

Wednesday, August 2, 2000 - Drag makeup maneuver (215/19:30:00)

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.

Current maximum and minimum temperature ranges of the LWIR FPA:
Friday, July 21, 2000:
2000/202 18:27:17 max = 84.026K
2000/202 19:27:01 min = 83.848K

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:

Wednesday, July 19 (Day 201) the EOS Operations Center switched to the upgraded on-line operations software build, Rev C. They will also upgraded to Project Database (PDB) 28. The switchover went well and the MODIS IOT is comfortable with the upgrades.

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 (http://jupiter02.gsfc.nasa.gov:591/sysstat/) 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: 170.4 of 500 hours
SRCA 10W Lamp #2: 134.3 of 500 hours
SRCA 10W Lamp #3: 143.5 of 500 hours
SRCA 10W Lamp #4: 61.5 of 500 hours

SRCA 1W Lamp #1: 555.6 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

Responsible Civil Servant: Ed Masuoka

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Last Update: Tuesday, 14-Jan-2003 13:28:23 EST

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