MODIS IOT Aqua Weekly Report

Mission Operations Days: 2002/145 to 2002/151
May 25, 2002 00:00:00 GMT to May 31, 2002 00:00:00 GMT

Aqua Spacecraft and MODIS Instrument Status:

This Week's Completed MODIS Activities:

None

None

None

None

2002/149 21:23:26 - 21:26:00 Real-Time Loaded Macro 31. MOD_MEM_PM_LOAD('PM1_MPR_MOD_111_SCIF_TEST',481,'N','DISABLE',1,16)
2002/149 21:26:24 - 21:30:05 Real-Time Dumped Macro 31 Table (not completed due to time constraint. MOD_MEM_DUMP('MACRO_31',481,0,0,1,16)
2002/149 22:51:42 - 22:51:57 Real-Time Halted memory transfer. MOD_MEM_HALT
2002/149 22:52:22 - 22:52:58 Real-Time Dumped last partition of Macro 31. MOD_MEM_PM_DUMP('MACRO_31',481,0,0,16,16)

None

2002/151 22:03:42 - 22:06:12 Real-Time Moved the SVD to Open (from Outgas) Position. MOD_SVD_TO_OPEN
2002/151 22:25:27 - 22:26:05 Real-Time Dumped the CP Door Position when Trigger Hit Table. MOD_MEM_PM_DUMP('MOTOR_POS_WHEN_HIT', 12, 0, 0, 1, 1)

This Week's Scheduled MODIS Activities Not Completed:

Upcoming MODIS Events:

Maneuvers:

The first Delta-V maneuver was successful but less effective than expected. Planning has begun for the next Delta-V.

• Ascent 1 on May 13, 2002 at 12:14 for 335.000 seconds - Successful
• Burn #2: June 5th, 2002 at 15:13:00, 1168 second duration
• Burn #3: June 8th, 2002 at 13:02:00, 793.5 second duration
• Burn #4: June 10th, 2002 at 12:43:00, 1004 second duration
• Burn #5: June 13th, 2002 at 13:51:00, 694 second duration
• Burn #6: June 18th, 2002 at 16:40:00, 755 second duration

MODIS Anomalies:

Since the second MODIS turn ON activity on DOY 144, there have been 19 pairs of 5D/77 CP event messages received. 5D is the TLM Format/Collect Mismatch message, and 77 is the TLM Late Telemetry Formatting message. SBRS says they have seen these messages during Thermal Vac (around CDH bus activities). The 5D message occurs when something upsets the sector timing or the CP. Since the 5D and 77 are coming together, there may be something going on with the 1553 bus. The events are shortly followed (within 5 seconds) by a telemetry packet with the same MOD_SS_CP1553_MAJCYC value. However, "it appears that the telemetry in said packet is a second reporting of the prior packet, with updates in the one second region. No updates to the data in the 8 and 64 second regions occurred, because the telemetry for that cycle was not sampled (as noted by event 5D)" [-Joe Auchter]. An Aqua Discrepancy Report (ADR) has been submitted to document the situation.

So far, there does not appear to be any recognizable pattern or discernable event that is triggering the CP to generate these event messages. Analysis of telemetry continues.

The last event set occurred at 2002/151-13:55:18.

General Instrument Comments:

MODIS is currently On in B-Side Standby Mode (Power Supply 2, Control Processor B) with the Space View Door at its Open Position. All 3 outgas heaters (Cold Stage, Intermediate Stage, and Outer Stage) are powered and duty cycling nominally.

MODIS Telemetry Trends:

The current MODIS telemetry is consistent with what is expected with MODIS in Standby Mode with Outgassing.

Non-MODIS Significant Events:

None

146/00:54 AIRS performs warm function checkout.
146/01:52 AIRS performs VIS/NIR Radiometric test on Lamp 1
146/02:40 AIRS performs VIS/NIR Radiometric test on Lamp 2
146/03:27 AIRS performs VIS/NIR Radiometric test on Lamp 3
CERES performs several calibration activities throughout the day.

CERES continues to perform their calibration activities.
147/15:10 AMSR/e enables their FMU taxi interface (SPS on).

148/12:57 CERES performs bi-axial internal calibration.
148/15:53 CERES performs solar calibration.

149/12:49 AMSR/e in observation mode.
CERES performs numerous checkouts and calibrations.

More CERES calibrations and checkouts throughout the day.
150/22:21 AIRS ES deployed.
150/23:15 AIRS Rad calibration on.
150/23:15 AIRS choke heater on.
150/23:40 CERES to standby.

151/11:22 HSB and AMSU parked.
151/13:05 Thrusters 1 & 2 fire test..
151/13:58 Thruster 3 fire test.
151/14:42 Thruster 4 fire test.
151/15:31 Thruster 1 fire test.
151/16:10 Thruster 3 fire test.
151/17:01 Thruster 2 fire test.
151/18:44 Thruster 4 fire test.
151/21:10 HSB and AMSU returned to normal scanning.

Limited Life Item Status:

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Last Update: Tuesday, 03-Dec-2002 13:08:59 EST