MODIS IOT Aqua Weekly Report

Mission Operations Days: 2002/313 to 2002/319
November 9, 2002 00:00:00 GMT to November 16, 2002 00:00:00

Aqua Spacecraft and MODIS Instrument Status:

This Week’s Completed MODIS Activities:

None

None

2002/315 13:19:19-13:33:17 MCL MOD_OA16_SDSM_SCREEN.2 OA16: SDSM Calibration with SD Screened - B Side
2002/315 14:11:17-14:11:33 MCL MOD_SRCA_SETUP.2 SRCA Turn On and Setup - B Side
2002/315 14:11:47-14:45:21 MCL MOD_OA19_SRCA_FULL_RAD.1 OA19: SRCA Full Radiometric
2002/315 14:58:12-15:12:10 MCL MOD_OA15_SDSM_OPEN.1 OA15: SDSM Calibration with SD Open - B Side

2002/316 13:15:29-13:15:45 MCL MOD_SRCA_SETUP.2 SRCA Turn On and Setup - B Side
2002/316 13:15:59-14:13:29 MCL MOD_OA23_SRCA_FULL_SPAT.1 OA23: SRCA Full Spatial

2002/316 AQUA Spacecraft Drag Makeup Maneuver

None

None

Roll Maneuver
Night time ground track recorded in Formatter Day Rate:
2002/319 03:11:36 MCL Single command for nominal formatter day rate MOD_OA03_FR_DAY_RATE.1
2002/319 03:57:40 MCL Single command to move formatter night rate ahead by 3:23 MOD_OA04_FR_NIGHT_RATE.2

2002/319 04:29:21 – 04:36:56 Spacecraft slew to -9.8076 degrees

2002/319 04:38:48 - 04:45:34 MCL Lunar calibration via roll maneuver MOD_OA08_ROLL_MAN.1
(command details listed below)
2002/319 04:38:48 MCL Set formatter to Day rate
2002/319 04:38:50 MCL Set SCIABNORM flag to ABNORM
2002/319 04:38:52 MCL Disable PC DC Restore
2002/319 04:38:54 MCL Disable PV DC Restore
2002/319 04:38:56 MCL Sector Rotation to -3072
2002/319 04:38:56 – 04:45:26 Lunar calibration data collection
2002/319 04:45:26 MCL Sector Rotation to zero
2002/319 04:45:28 MCL Enable PC DC Restore
2002/319 04:45:30 MCL Enable PV DC Restore
2002/319 04:45:32 MCL Set SCIABNORM flag to NORM
2002/319 04:45:34 MCL Set formatter to Night rate
2002/200 04:53:52 MCL Single command to move formatter day rate later by 3:23 MOD_OA03_FR_DAY_RATE.1

2002/319 04:45:26 – 04:53:01 Spacecraft slew back

This Week’s Scheduled MODIS Activities Not Completed:

None

Upcoming MODIS Events:

2002/325 13:24:11-13:26:42 MCL MOD_OA27_PV_ECAL.1 OA27: PV ECAL
(Centered on Ground Track Night to Day Crossing over South Pole)

Additional calibrations planned for November:

Weekly SD/SDSM Calibrations

Maneuvers:

The Deep Space Calibration pitch maneuver(s) have been indefinitely suspended pending mission review.

MODIS Anomalies:

The MODIS commanding anomaly is still being investigated. A patch was loaded to the Aqua spacecraft on Tuesday, October 11, 2002 (DOY 2002/284). This patch switched the MODIS ground-command timing slots with the MODIS stored-command timing slots. This transfers the risk associated with dropping commands from stored commands to real-time ground commands.

No problems have been reported since the patch was loaded and the last command drop occurred on September 2, 2002 (DOY 2002/245). The results of the patch will be evaluated for some time before the next configuration change is made. A final patch to the Aqua Bus Scheduler Task (BST) is being considered which would eliminate the timing issues to MODIS for both ground commands and stored commands.

On November 7, 2002 (DOY 2002/311), final patch to the BST was outlined. The two MODIS command slots in the BST that are currently switched will be returned to their original locations. At the same time, the command slots will be given a one minor cycle delay. This will result in the command slots having the desired delay period between themselves, and the bus signals that are believed to have caused the occasional problems with MODIS receiving commands.

General Instrument Comments:

FM1 MODIS is in Science Mode. The SVD and NAD are Open, the survival heaters are enabled, and the Black Body is heated to 285 K.

MODIS Telemetry Trends:

The FM1 MODIS instrument telemetry is trending nominally. The most recent radiative cooler telemetry analysis indicates significant temperature margin for the cold focal planes.

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 webpages. 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: 209.9 of 500 hours
SRCA 10W Lamp #2: 181.7 of 500 hours
SRCA 10W Lamp #3: 184.5 of 500 hours
SRCA 10W Lamp #4: 57.7 of 500 hours

SRCA 1W Lamp #1: 501.0 of 5000 hours
SRCA 1W Lamp #2: 269.8 of 5000 hours

Solar Diffuser Door: 1864 of 3022 Movements
Nadir Aperture Door: 1053 of 1316 Movements
Space View Door: 632 of 1316 Movements

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Email the MCST Helpdesk to ask a question about Level 1B usage, algorithms or software.

Last Update: Friday, 18-Apr-2003 14:29:47 EDT