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Mission Operations Days: 2004/353 to 2004/359
December 18, 2004 00:00:00 GMT to December 24, 2004 00:00:00 GMT

Terra Spacecraft and MODIS Instrument Status:

AM-1 "Terra" is in Normal Mode
PFM MODIS is in A-Side Nominal Science Mode
(Cross Strapped with FR B)
BlackbodyA On (290K); B OffNominal Science Mode
Calibration ElectronicsA On; B OffNominal Science Mode
Control ProcessorA On; B OffNominal Science Mode
Nadir DoorUnlatched, OpenNominal Science Mode
Space View DoorUnlatched, OpenNominal Science Mode
Solar Diffuser DoorUnlatched, ScreenedPermanent Configuration
FDDI FormatterA On; B OffNominal Science Mode
FDDI PortA On; B OffNominal Science Mode
FIFO Memory#1 & #2 On; #3 & #4 OffNominal Science Mode
Format ProcessorA Off; B OnNominal Science Mode
Power Supplies#1 On, #2 OffNominal Science Mode
PV VIS FPAA On; B OffNominal Science Mode
PV NIR FPAA On; B OffNominal Science Mode
PV SMIR FPAA On; B OffNominal Science Mode
PV LWIR FPAA On; B OffNominal Science Mode
PC LWIR FPAA On; B OffNominal Science Mode
RC Outgas HeatersAll 3 (CS, IS, OS) OffNominal Science Mode
RC LWIR FPA HeaterOn (83K)Nominal Science Mode
RC SMIR FPA HeaterOffNominal Science Mode
Scan AssemblyA On; B OffNominal Science Mode
SDSMOffNominal Science Mode
SRCAOffNominal Science Mode
PS1 Survival HeaterEnabledNominal Science Mode
PS2 Survival HeaterEnabledNominal Science Mode
Timing GeneratorA On; B OffNominal Science Mode
Flight SoftwareRev BD + 11 sets of patches
  • CP07 to Survival Mode - No SDD to closed command (1 patch)
  • CP07 to Safe Mode - No FR OFF Command (1 patch)
  • CP07 to Safe Mode - No SDD to closed command (1 patch)
  • CP07 to Science Mode - Turn on FRB instead of FRA (1 patch)
  • CP07 to Outgas and Science Mode - Turn on FRB instead of FRA (1 patch)
  • FR Error Counting and Statistics (2 patches)
  • FR 1000ms time code patches (3 patches)
  • FR Band 5 Gain Change (20 commands)
  • FR BB Ideal Output Values (1 patch)
  • FR A EEPROM KME Fast 1 word patch (1 patch)
  • FR B EEPROM KME Fast 1 word patch (1 patch)
Nominal Science Mode
Inhibit Ids SetnoneNominal Science Mode
TMON 66DisabledNominal Science Mode
TMON 67DisabledNominal Science Mode
TMON 68EnabledNominal Science Mode
TMON 69DisabledNominal Science Mode

This Week’s Completed MODIS Activities:

Saturday, December 18, 2004

2004/353 08:58:08-09:00:39 ATC MOD_OA27_PV_ECAL.3 OA-27: Photovoltaic bands electronics calibration

Sunday, December 19, 2004


Monday, December 20, 2004


Tuesday, December 21, 2004


Wednesday, December 22, 2004


Thursday, December 23, 2004


Friday, December 24, 2004


This Week’s Scheduled MODIS Activities Not Completed:


Upcoming MODIS Events:

Calibrations for December will include biweekly SDSM, monthly SRCA 10W Radiometric, and bi-monthly PV ECAL.

Tuesday, December 28, 2004

2004/363 21:08:33-21:17:21 ATC MOD_OA16_SDSM_SCRN_NO_DOOR_A.4 OA-16: SD/SDSM screened side A, no door movement.
2004/363 21:50:00-21:50:31 ATC MOD_SRCA_11_3_8_2_SETUP.1 SRCA setup activity using lamp #4 in lieu of lamp #2
2004/363 21:58:06-22:19:01 ATC MOD_OA20_SRCA_10W_RAD_A_Base.2 OA-20: SRCA 10W Continuous Radiometric - A Side, Using Lamp #1
Data Collect from 22:14:00-22:19:01

Friday, December 31, 2004

Lunar Roll Maneuver (-1.3898 deg roll)
2004/366 14:19:04-14:46:17 ATC MOD_OA03_FR_NIGHT_RATE (03:23 early)
2004/366 14:46:17-14:53:03 ATC MOD_OA08_ROLL_MAN
2004/366 15:15:15-16:01:20 ATC MOD_OA03_FR_DAY_RATE (03:23 late)


The December Lunar Calibration Roll will be on day 2004/366 (December 31, 2004). Data collect will be from 14:46:25-14:52:55 GMT with a roll angle of –1.3898 degrees.

MODIS Anomalies:

SRCA Lamp #2 failure:

On day 2004/327 (11/22/04), Terra MODIS performed a special SRCA 10W continuous calibration with the filter in the OPEN position. However, it was noticed by MCST that Lamp #2 shut down approximately halfway through it's scheduled on time (55 minutes, 3 seconds of the 109 minute duration). Analysis is still being performed to determine the exact cause of this unexpected shutdown and course of action to be taken.

MODIS NAD (Nadir Aperture Door) Anomaly:

Telemetry still indicates that the “NAD Open” (MOD_CR_DR_NAD_OPEN) trigger is set to the “NOT_OPEN” position; however, science data has shown that the NAD is open. The NAD OPEN trigger may yet “pop” to OPEN due to thermal cycling on the trigger, as was seen on 2002/079.

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 and the Solar Diffuser Door at the Screened position.

MODIS Telemetry Trends:

Nominal telemetry trending is ongoing.

Non-MODIS Significant Events:

Terra Solid State Recorder Anomaly


The SSR Anomaly is still under investigation. MODIS currently is operating with 34 Supersets allotted for its buffer. There are plans in the works for possibly power cycling the SSR to get back PWA’s that are in the Bad List, but no date has yet been set. There are no current plans for a change in science data capture rates. For details, see previous report am1weekly_2003-305_2003-311.doc. The Terra FOT is currently evaluating plans to perform a power recycling of the SSR in an attempt to regain functionality of the “bad” PWAs. This activity will be performed at a time when it is least detrimental to critical science data.

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.

Limited Life Item Status:

SRCA 10W Lamp #1: 238.2 of 500 hours
SRCA 10W Lamp #2: 173.3 of 500 hours
SRCA 10W Lamp #3: 182.7 of 500 hours
SRCA 10W Lamp #4: 70.9 of 500 hours

SRCA 1W Lamp #1: 567.3 of 4000 hours
SRCA 1W Lamp #2: 278.7 of 4000 hours

Solar Diffuser Door: 2146 of 3022 Movements
Nadir Aperture Door: 538 of 1316 Movements
Space View Door: 441 of 1316 Movements