MODIS IOT Terra Weekly Report

Mission Operations Days: 2002/005 to 2002/011
January 4, 2002 20:00:00 GMT to January 11, 2002 20:00:00 GMT

Terra Spacecraft and MODIS Instrument Status:

This Week's Completed MODIS Activities:

None

2002/006 11:59:06 ATC OA-16: SDSM Screened
2002/006 13:37:59 ATC OA-15: SDSM Open

2002/007 20:56:39 ATC OA-15: SDSM Open with SDSM mirror fixed at SD view
2002/007 22:35:31 ATC OA-16: SDSM Screened with SDSM mirror fixed at Sun view

None

None

None

None

This Week's Scheduled MODIS Activities Not Completed:

None

Upcoming Week's MODIS Events:

Terra MODIS calibrations for the month of January will include an SRCA Full Radiometric, SRCA Full Spatial, SRCA Full Spectral, Blackbody heating, and biweekly SDSM calibrations.

Maneuvers:

The next MODIS Lunar Calibration via a spacecraft roll maneuver is scheduled for February 3rd, 2002 (2002/032) with data collection from 20:19:21 to 20:25:51. The roll angle will be -3.4357 degrees.

A Drag Make-Up (DMU) maneuver of 17 seconds on Wednesday, January 9, 2002, at 20:12:40 completed successfully.

The next Inclination Adjust Maneuver (2 of 6), a 320-second burn duration, is scheduled for January 16, 2002, at 15:31:30. For this second inclination maneuver, the MODIS doors will only be closed in the event of a failure to return to nominal pointing. A second DMU maneuver is planned for the week after the IAM (date and duration dependent on the results of the IAM).

The IOT has been notified that the Terra Deep Space Calibration Maneuver has been postponed once again. The maneuver is not expected to be performed until late summer of 2002 at the earliest. The reasoning for this delay was to allow the EOS Operations Center (EOC) time to adjust to operating Terra and Aqua spacecraft simultaneously.

MODIS Anomalies:

The formatter error rate has been fairly steady for the past few weeks with the counter rollover time approximately every seven hours and forty-five minutes.

Error tracking spreadsheets have been updated and can be retrieved from:

An MS Excel spreadsheet called, AM1_FR_error_rollovers_MMDDYY.xls contains the data for the times each of the error count "roll over" occurs (with the MMDDYY denoting the date the spreadsheet was made, the more recent date containing the most up-to-date information).

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:

No abnormal telemetry trends are being observed.

Non-MODIS Significant Events:

Science Data Loss Reports can be viewed at:

Select "Search Data Losses", and choose Data Type: MOD

Then press the big SUBMIT button.

Limited Life Item Status:

SRCA 10W Lamp #1: 192.8 of 500 hours
SRCA 10W Lamp #2: 147.2 of 500 hours
SRCA 10W Lamp #3: 156.4 of 500 hours
SRCA 10W Lamp #4: 61.5 of 500 hours

SRCA 1W Lamp #1: 558.6 of 4000 hours
SRCA 1W Lamp #2: 276.3 of 4000 hours

Solar Diffuser Door: 1793 of 3022 Movements
Nadir Aperture Door: 534 of 1316 Movements
Space View Door: 437 of 1316 Movements

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Last Update: Thursday, 04-Sep-2003 18:14:23 EDT