MODIS IOT Terra Weekly Report

Mission Operations Days: 2003/067 through 2003/073
March 7, 2003 20:00:00 GMT to March 14, 2003 20:00:00 GMT

Terra Spacecraft and MODIS Instrument Status:

This Week's Completed MODIS Activities:

None

None

2003/069 21:42:00-22:02:00 ATC FR Day Mode over NADIR Groundtrack Night

None

2003/071 20:18:09-20:31:20 ATC MOD_OA16_SD_SCREEN_FXD_SUN_A.1 OA16: SD/SDSM Screened with SDSM Fixed At Sun View - A Side
2003/071 21:17:51-21:51:75 ATC MOD_OA19_SRCA_FULL_RAD_A.3 OA19: SRCA Full Radiometric - A Side
2003/071 21:57:01-22:10:12 ATC MOD_OA15_SD_OPEN_FIXED_SD_A.1 OA15: SD/SDSM Open with SDSM Fixed At SD - A Side

2003/072 05:20:15-06:17:46 ATC MOD_OA23_SRCA_FULL_SPAT_A.2 OA23: SRCA Full Spatial - A Side

None

This Week's Scheduled MODIS Activities Not Completed:

None

Upcoming MODIS Events:

A 20-minute FR Day Rate during Night NADIR Ground Track for the following period was executed: 2003/069 21:42:00-22:02:00. This time overlaps the 21:45-22:00 "data granule", and consists of a ground track starting in the South Atlantic and rides up the Western Coastline of the Southern portion of Africa. The Night NADIR Ground Track collection of FR Day Rate Science Data is used to verify and trend the SWIR bands out-of-band correction coefficients.

March calibrations for the PFM MODIS instrument will include an SRCA full radiometric, an SRCA full spatial, and biweekly SD calibrations.

The following activities have been scheduled for the upcoming Terra Deep Space Calibration maneuver and the backup maneuver. If the first maneuver is successful, the backup activities will be unscheduled.

Terra Deep Space Calibration (DSC) Maneuver (no Lunar View)
2003/085 14:04:05 FR to DAY (NADIR to DAY)
2003/085 14:17:05 FR to NIGHT (NADIR to DAY+00:13:00)
2003/085 14:53:31 FR to DAY (NADIR to NIGHT)
2003/085 15:29:58 FR to NIGHT (NADIR to DAY-00:13:00)
2003/085 15:42:58 FR to DAY (NADIR to DAY)

Terra DSC Maneuver (no Lunar View) Back-Up Schedule
2003/088 14:34:44 FR to DAY (NADIR to DAY)
2003/088 14:47:44 FR to NIGHT (NADIR to DAY+00:13:00)
2003/088 15:37:06 FR to DAY (NADIR to NIGHT)
2003/088 16:13:33 FR to DAY (NADIR to DAY)
2003/088 16:13:33 FR to DAY (NADIR to DAY)

Maneuvers:

The next Terra MODIS lunar calibration is being planned for March 22, 2003 with a roll angle of -20.0000 degrees and data collection from 07:09:50 to 07:16:20 GMT. The optimal roll angle is actually -20.6 degrees. However, the moon will still be in the field of view of the space view port using the maximum allowed roll angle of -20.0 degrees.

The Terra Drag Make-up Maneuver was successfully executed on March 6, 2003. The maneuver was at 2003/65 19:17. The Loss of Pointing Accuracy window was 2003/065 18:17:30 to 2003/065 20:45:00.

The Terra Deep Space Calibration Maneuvers are now being planned for March 26, 2003 (without the moon in the instruments fields of view) and April 14, 2003 (with the moon in the spacecraft orbit plane). The March 26, 2003 maneuver will start at 2003/085-14:53:32 GMT and will be completed at 15:29:26. The backup date scheduled (in the event the maneuver has to be "waved off") for the maneuver is 2003/088 15:37:07. The April 14, 2003 maneuver will start at 2003/104-21:57:56 GMT and will be completed at 22:33:50. The time of the maneuvers may fluctuate as a result of orbit changes.

For approximately 36 minutes prior to the maneuver, the MODIS instrument will be configured to collect data at the formatter Night rate. During the maneuver, data collection will be at the formatter Day rate. Following the maneuver, the high-rate instrument data feeds (including MODIS') to the Terra solid state recorder will be disabled until the maneuver data are successfully captured on the ground through two different downlink opportunities.

MODIS Anomalies:

None

General Instrument Comments:

MODIS is in Science Mode, using all A-side components, but cross-strapped to Formatter B, with the blackbody maintained at 290K.

MODIS Telemetry Trends:

Nominal telemetry trending is ongoing.

Non-MODIS Significant Events:

The EMOS mission status webpage (which includes instrument data loss records) can be found at the following URL. Note that a password is now required to access the EOS mission links web pages. There are directions at the URL below for how to obtain a username/password.

http://jupiter02.gsfc.nasa.gov/links/links.htm

Limited Life Item Status:

SRCA 10W Lamp #1: 208.9 of 500 hours
SRCA 10W Lamp #2: 157.7 of 500 hours
SRCA 10W Lamp #3: 166.9 of 500 hours
SRCA 10W Lamp #4: 61.9 of 500 hours

SRCA 1W Lamp #1: 561.5 of 4000 hours
SRCA 1W Lamp #2: 276.5 of 4000 hours

Solar Diffuser Door: 2121 of 3022 Movements
Nadir Aperture Door: 536 of 1316 Movements
Space View Door: 439 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: Tuesday, 18-Mar-2003 20:39:26 EST