MODIS IOT Terra Weekly Report

Mission Operations Days: 2003/095 through 2003/101
April 4, 2003 20:00:00 GMT to April 11, 2003 20:00:00 GMT

Terra Spacecraft and MODIS Instrument Status:

This Week’s Completed MODIS Activities:

None

None

None

2003/098 11:42:06 – 11:53:17 ATC MOD_OA16_SD_SCREEN_FXD_SUN_A.1 OA16: SD/SDSM Screened with SDSM Fixed At Sun View - A Side
2003/098 13:20:59 – 13:32:10 ATC MOD_OA15_SD_OPEN_FIXED_SD_A.1 OA15: SD/SDSM Screened with SDSM Fixed At SD View - A Side

2003/099 21:30:00 - 21:30:29 ATC MOD_SRCA_NOMINAL_SETUP Nominal setup activity for SRCA activities
2003/099 21:38:42 - 22:13:49 ATC MOD_SPECIAL_10W_10WND_1W SRCA radiometric mode calibration with 10W, 10W + ND filter, and 1W lamp levels

2003/100 02:25:00 - 02:25:29 ATC MOD_SRCA_BACKUP_SETUP Setup activity for SRCA activities using backup lamp #4 for 10W lamp level and 1W lamp #2 for the 1W lamp level
2003/100 02:35:20 - 03:10:27 ATC MOD_SPECIAL_10W_10WND_1W SRCA radiometric mode calibration with 10W, 10W + ND filter, and 1W lamp levels

None

This Week’s Scheduled MODIS Activities Not Completed:

None

Upcoming MODIS Events:

April calibrations for the PFM MODIS instrument include bi-weekly SDSM, monthly radiometric, bi-monthly PV ECAL, and quarterly SRCA full spectral and black body calibrations.

Terra 2nd Deep Space Calibration (DSC) pitch maneuver (with lunar view)

2003/104 21:21:44 ATC MOD_OA04_NIGHT_RATE.1 Sets MODIS Formatter to night rate Scheduled at nadir terminator crossing minus 35:54 for pre-DSC data rate balance
2003/104 21:57:38 ATC MOD_OA03_DAY_RATE.2 Sets MODIS Formatter to day rate Scheduled at nadir terminator crossing in lieu of normal formatter to night command
2003/104 22:33:32 ATC MOD_OA04_NIGHT_RATE.1 Sets MODIS Formatter to night rate Scheduled at nadir terminator crossing plus 35:54 for DSC data rate balance

Maneuvers:

The second Terra Deep Space Calibration Maneuver is still on schedule for April 14, 2003 (with the moon in the spacecraft orbit plane). The maneuver will start at approximately 2003/104-21:57:38 GMT and will be completed at 22:33:50.

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.

There will not be a Terra MODIS lunar calibration during the month of April. The required roll angle exceeds the maximum allowed angle of -20 degrees.

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: 209.2 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: 62.2 of 500 hours

SRCA 1W Lamp #1: 561.7 of 4000 hours
SRCA 1W Lamp #2: 276.7 of 4000 hours

Solar Diffuser Door: 2133 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: Friday, 18-Apr-2003 12:29:57 EDT