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am1weekly_2001-013_2001-019

Mission Operations Days: 2001/013 to 2001/019
January 13, 2001 00:00:00 GMT to January 19, 2001 00:00:00 GMT


Terra Spacecraft and MODIS Instrument Status:

Terra (AM-1) is in Normal Ops Mode
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 + 1 set of patches
  • FR Error Counting and Statistics (2 patches)
Nominal
Inhibit Ids Set None Nominal
TMONs Enabled 68 Nominal

This Week’s Completed MODIS Activities:

Saturday, January 13, 2001

Lunar Roll Maneuver (-3.584 degree roll)
2001/013 16:59:42 ATC Move Formatter to Night ahead by 3:23 to ensure 50/50 day/night
2001/013 17:17:25 FOT ATC commanding: Begin Slew to –3.584 degrees
2001/013 17:20:29 ATC Set Formatter to Day Rate
2001/013 17:20:31 ATC Set SCIABNORM Flag to ABNORM
2001/013 17:20:33 ATC PC DC Restore to OFF
2001/013 17:20:35 ATC PV DC Restore to OFF
2001/013 17:20:37 ATC Sector Rotation to -3072 (EA to SV and OBCs)
2001/013 17:27:07 ATC Sector Rotation to Zero (Normal)
2001/013 17:27:09 ATC PV DC Restore to ON
2001/013 17:27:11 ATC PC DC Restore to ON
2001/013 17:27:13 ATC Set SCIABNORM Flag to NORM
2001/013 17:27:15 ATC Set Formatter to Night Rate
2001/013 17:29:39 FOT ATC commanding: Returned to nominal attitude
2001/013 17:55:53 ATC Move Formatter to Day later by 3:23 to ensure 50/50 day/night

Note: For the second lunar calibration below, the spacecraft did NOT do a roll maneuver. Terra’s nominal attitude allowed for a “free” view of the moon through the space view port.

2001/013 23:35:13 ATC Move Formatter to Night ahead by 3:23 to ensure 50/50 day/night
2001/013 23:54:04 ATC Set Formatter to Day Rate
2001/013 23:54:06 ATC Set SCIABNORM Flag to ABNORM
2001/013 23:54:08 ATC PC DC Restore to OFF
2001/013 23:54:10 ATC PV DC Restore to OFF
2001/013 23:54:12 ATC Sector Rotation to -3072 (EA to SV and OBCs)

Sunday, January 14, 2001

2001/014 00:00:42 ATC Sector Rotation to Zero (Normal)
2001/014 00:00:44 ATC PV DC Restore to ON
2001/014 00:00:46 ATC PC DC Restore to ON
2001/014 00:00:48 ATC Set SCIABNORM Flag to NORM
2001/014 00:00:50 ATC Set Formatter to Night Rate
2001/014 00:31:23 ATC Move Formatter to Day later by 3:23 to ensure 50/50 day/night

Monday, January 15, 2001

None

Tuesday, January 16, 2001

None

Wednesday, January 17, 2001

None

Thursday, January 18, 2001

2001/018 21:17:40 ATC OA-16: SDSM Screened
2001/018 22:56:32 ATC OA-15: SDSM Open

Friday, January 19, 2001

None

This Week's Scheduled MODIS Activities Not Completed:

None

Upcoming MODIS Events:

Friday, January 19, 2001

None

Saturday, January 20, 2001

None

Sunday, January 21, 2001

None

Monday, January 22, 2001

None

Tuesday, January 23, 2001

None

Wednesday, January 24, 2001

None

Thursday, January 25, 2001

None

Friday, January 26, 2001

None

Maneuvers:

A drag makeup maneuver was performed by the FOT at 017/19:38:00 to 017/21:08:00.

The next MODIS Lunar Calibration Roll Maneuver is planned for 2001/043, February 12th

MODIS Anomalies:

No formatter anomalies have been detected since switching to B-side science operations. The MODIS IOT is continuing to monitor changes with the radiative cooler temperatures and focal plane power.

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). No new events have been witnessed by the FRFSP since the B-Side Transition on DOY 2000/304.

MODIS Telemetry Trends:

The Radiative Cooler intermediate stage temperature has slowly been increasing since approximately day 2000/240. During this time the LWIR focal plane heater margin has been decreasing. The IOT is continuing to trend these telemetry mnemonics.

Temperature trends are correlating with the solar beta angle. This includes a steadying of the intermediate stage outgas temperature. This temperature is expected to increase again when the beta angle gets smaller.

Non-MODIS Significant Events:

None.

Limited Life Item Status:

SRCA 10W Lamp #1: 179.2 of 500 hours
SRCA 10W Lamp #2: 139.2 of 500 hours
SRCA 10W Lamp #3: 148.4 of 500 hours
SRCA 10W Lamp #4: 61.5 of 500 hours

SRCA 1W Lamp #1: 556.6 of 4000 hours
SRCA 1W Lamp #2: 276.3 of 4000 hours

Solar Diffuser Door: 1507 of 3022 Movements
Nadir Aperture Door: 532 of 1316 Movements
Space View Door: 437 of 1316 Movements