MODIS IOT Aqua Weekly Report

Mission Operations Days: 2003/074 through 2003/080
March 15, 2003 00:00:00 GMT to March 22, 2003 00:00:00 GMT

Aqua Spacecraft and MODIS Instrument Status:

This Week’s Completed MODIS Activities:

None

None

2003/076 16:01:01-16:01:17 MCL MOD_SRCA_SETUP.2 Configures B Side SRCA for 10W Lamp #1
2003/076 16:01:31-16:17:26 MCL MOD_OA20_SRCA_10W_RAD.1 OA-20: SRCA 10W Radiometric Continuous Data Collection begins at the "end" of the activity
2003/076 16:22:25 Spacecraft Day to Night
2003/076 16:56:16 Spacecraft Night to Day
2003/076 17:01:16-17:01:47 MCL MOD_SRCA_OFF.1 Turns off SRCA
2003/076 18:32:21-18:46:19 MCL MOD_OA16_SDSM_SCREEN.2 OA-16: SD/SDSM Screen - B Side
2003/076 20:11:14-20:25:12 MCL MOD_OA15_SDSM_OPEN.1 OA-15: SD/SDSM Open - B Side

2003/077 01:54:21-01:54:37 MCL MOD_SRCA_SETUP_10W_L2.3 Configures B Side SRCA for 10W Lamp #2
2003/077 01:54:51-02:10:46 MCL MOD_OA20_SRCA_10W_RAD.1 OA-20: SRCA 10W Radiometric Continuous - B Side Data Collection begins at the "end" of the activity
2003/077 02:15:45 Spacecraft Day to Night
2003/077 02:49:35 Spacecraft Night to Day
2003/077 02:54:35-02:55:06 MCL MOD_SRCA_OFF.1 Turns off SRCA
2003/077 08:29:54-08:30:10 MCL MOD_SRCA_SETUP_10W_L3.3 Configures B Side SRCA for 10W Lamp #3
2003/077 08:30:24-08:46:19 MCL MOD_OA20_SRCA_10W_RAD.1 OA-20: SRCA 10W Radiometric Continuous - B Side Data Collection begins at the "end" of the activity
2003/077 08:51:18 Spacecraft Day to Night
2003/077 09:25:08 Spacecraft Night to Day
2003/077 09:30:08-09:30:39 MCL MOD_SRCA_OFF.1 Turns off SRCA
2003/077 15:05:27-15:05:43 MCL MOD_SRCA_SETUP_10W_L4.1 Configures B Side SRCA for 10W Lamp #4 (the spare)
2003/077 15:05:57-15:21:52 MCL MOD_OA20_SRCA_10W_RAD.1 OA-20: SRCA 10W Radiometric Continuous - B Side Data Collection begins at the "end" of the activity
2003/077 15:26:51 Spacecraft Day to Night
2003/077 16:00:41 Spacecraft Night to Day
2003/077 16:05:41-16:06:12 MCL MOD_SRCA_OFF.1 Turns off SRCA

Spacecraft DMU#9
2003/078 15:33:00 AQUA Slew out
2003/078 16:15:00 75 second drag makeup burn
2003/078 17:07:00 AQUA slew back

2003/079 02:12:00-02:32:00 MCL FR Day Mode over NADIR ground track Night.

None

This Week’s Scheduled MODIS Activities Not Completed:

None

Upcoming MODIS Events:

2003/083 08:49:57 MCL MOD_OA16_SDSM_SCREEN.2 OA-16: SD/SDSM Screen - B Side
2003/083 10:28:51 MCL MOD_OA15_SDSM_OPEN.1 OA-15: SD/SDSM Open - B Side

March calibrations for the FM1 MODIS instrument include an SRCA full radiometric, an SRCA full spatial, Lunar Calibration Roll, and weekly SD calibrations.

A flight software patch is planned to the Control Processor CP07 mode transition table to not turn off the instrument formatter when MODIS transitions to Safe Mode. However, this patch is still postponed until the Aqua BST patch has been implemented.

Maneuvers:

The next FM1 MODIS Lunar Calibration via Spacecraft Roll Maneuver is April 12, 2003 (DOY 2003/102) with data collection from 20:23:18 to 20:29:58 GMT and a roll angle of -10.4528 degrees.

The Deep Space Calibration pitch maneuver(s) are still postponed pending the results of the Terra Deep Space Calibration maneuvers currently planned for March 26 and April 14, 2003.

MODIS Anomalies:

Recent SRCA calibrations have shown that SRCA Lamp #2 is degrading. Further testing will be performed to determine to what extent the lamp has degraded.

Work is still underway to fix the current BST patch as well as modify the final BST patch that was nearing final review approval. This fix will solve the problem of MODIS Ground Command transactions being disabled by MODIS Stored 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 radiative cooler temperatures have leveled off with approximately 37mW of margin left with the SMIR focal plane heater. These telemetry points will continue to be closely monitored.

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.

At approximately 2003/036 21:39:02 (Wednesday, Feb. 05, 2003) the HSB Instrument received a Scan Motor Sync Error (HSB_SS_IDFLGW1B09) that did not automatically clear after eight seconds. This was followed by a Sync Failure To Recover indicator alert (HSB_SS_IDFLGW1B11). This failure to recover lead to a sequence of events that placed the HSB Instrument in Survival Mode. HSB remains in Survival Mode to date while anomaly teams assess the situation and plan for a possible return to science mode.

At 15:09:24 on Wednesday, March 5, 2003, the Aqua FOT loaded the Aqua FSW Patch for Geolocation Fix. This patch solves the coordinate system time frame inconsistency on the Star Catalog processing on the GNCC that has caused small amounts of geolocation errors to propagate into the MODIS Science Data. The problem was causing oscillating ground track errors in the order +/- 200 meters. This error has now been reduced to less than +/- 80 meters with the application of the FSW Patch.

On Saturday, March 8, 2003 (DOY 2003/067), the CERES-Aft instrument entered Safe Mode at 10:26:20, as a result of scheduling errors that activated the internal CERES Fault Management inadvertently. CERES-Aft recovered from Safe Mode on March 14, 2003 (DOY 2003/073) at 15:07 GMT.

Limited Life Item Status:

SRCA 10W Lamp #1: 215.6 of 500 hours
SRCA 10W Lamp #2: 184.3 of 500 hours
SRCA 10W Lamp #3: 187.1 of 500 hours
SRCA 10W Lamp #4: 58.4 of 500 hours

SRCA 1W Lamp #1: 503.2 of 5000 hours
SRCA 1W Lamp #2: 269.8 of 5000 hours

Solar Diffuser Door: 1972 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: Tuesday, 22-Apr-2003 17:25:50 EDT