MODIS IOT Terra Weekly Report

Mission Operations Days: 2002/068 to 2002/074
March 8, 2002 20:00:00 GMT to March 15, 2002 20:00:00 GMT

Terra Spacecraft and MODIS Instrument Status:

This Week's Completed MODIS Activities:

None

None

None

None

Drag Makeup Maneuver
2002/072 19:01:00 Low Fidelity Spacecraft pointing
2002/072 20:00:37 - 20:01:07 Real-Time 30 second drag makeup burn
2002/072 20:16:00 High Fidelity Spacecraft pointing
2002/072 21:32:37 - 21:45:48 OA16:SDSM SCREENED (Fixed sun view) - A side
2002/072 22:24:22 - 22:57:55 OA19:SRCA Full Radiometric - A side
2002/072 23:11:30 - 23:24:41 OA15:SDSM OPEN (Fixed SD view) - A side

2002/073 14:53:08 - 15:50:39 OA23:SRCA Full Spatial - A side

None

This Week's Scheduled MODIS Activities Not Completed:

None

Upcoming Week's MODIS Events:

2002/078 15:49:25 - 16:01:06 ATC MOD_CLOSE_NAD_SVD.1 Contingency for TERRA inclination adjust. Will be inhibited if the maneuver is nominal.

Maneuvers:

There will be no MODIS Lunar Calibration at the beginning of April because the required roll angle will exceed the allowable limit.

There has been a change to the Terra inclination maneuver schedule. A new constraint has been imposed to have the maneuvers completed prior to the launch of the Aqua spacecraft (currently April 18, 2002). The (remaining) new inclination maneuver dates are March 19 and April 4, 2002. This new plan violates a previous constraint of not performing more than two maneuvers in any 7-week period. Therefore, Flight Dynamics products for dates beyond the next two maneuvers will have inaccuracies.

The Terra Deep Space Calibration Maneuver is still postponed. The maneuver date is not expected until late summer of 2002.

MODIS Anomalies:

The Formatter Error Rate is still increasing with a buffer rollover time of about five hours and fifteen minutes. The current error-logging plan to only monitor the first 15 noted addresses was deemed the best monitoring approach at present. Therefore, the current limit of 15 addresses will continue to be used.

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) and a Formatter Time Code Patch.

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: 196.3 of 500 hours
SRCA 10W Lamp #2: 149.4 of 500 hours
SRCA 10W Lamp #3: 158.6 of 500 hours
SRCA 10W Lamp #4: 61.5 of 500 hours

SRCA 1W Lamp #1: 559.2 of 4000 hours
SRCA 1W Lamp #2: 276.3 of 4000 hours

Solar Diffuser Door: 1823 of 3022 Movements
Nadir Aperture Door: 534 of 1316 Movements
Space View Door: 437 of 1316 Movements

Email the MODIS IOT to report any problem with the MODIS IOT Web Pages.
Email the MCST Webmaster to report any problem with the MCST Web Pages.
Email the MCST Helpdesk to ask a question about Level 1B usage, algorithms or software.

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