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Mission Operations Days: 2004/213 to 2004/219
July 31, 2004 00:00:00 GMT to August 06, 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, July 31, 2004


Sunday, August 1, 2004


Monday, August 2, 2004


Tuesday, August 3, 2004

2004/216 20:26:06-20:34:54 ATC MOD_OA16_SDSM_SCRN_NO_DOOR_A.4 OA-16: SD/SDSM screened side A, no door movement.
2004/216 21:00:00-21:00:31 ATC MOD_SRCA_11_3_8_2_SETUP.1 SRCA setup activity using lamp #4 in lieu of lamp #2
2004/216 21:15:24-21:50:34 ATC MOD_OA19_SRCA_FULL_RAD_A.6 OA-19: SRCA Full Radiometric Calibration. Data collection from 21:31:18-21:49:35.

Wednesday, August 4, 2004

Lunar Roll Maneuver
2004/217 19:57:55 Real-Time Terra FOT commands S/C to low-fidelity pointing
2004/217 20:24:36 ATC MOD_OA03_FR_NIGHT_RATE (03:23 early)
2004/217 20:47:29-20:54:15 ATC MOD_OA08_ROLL_MAN
2004/217 21:20:50 ATC MOD_OA03_FR_DAY_RATE (03:23 late)
2004/217 21:45:00 Real-Time Terra FOT commands S/C to high-fidelity pointing

Thursday, August 5, 2004


Friday, August 6, 2004

2004/219 21:07:56-21:10:27 ATC MOD_OA27_PV_ECAL.3 OA-27: Photovoltaic bands electronics calibration

This Week’s Scheduled MODIS Activities Not Completed:


Upcoming MODIS Events:

Calibrations for August will include biweekly SDSM, and monthly SRCA 10W Radiometric.


The September Lunar Calibration Roll will be on day 2004/247 (September 3, 2004). Data collect will be from 11:19:30-11:26:00 GMT with a roll angle of –7.8751 degrees.

MODIS Anomalies:

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


On day 2004/213, another PWA was lost onboard the SSR. This PWA contained supersets 10 and 11, which both resided in the MISR buffer. Due to the movement of the bad supersets to the BAD list, and reallocation of the single superset from the TRASH buffer to MISR, there were a total of 2 science data losses. The two losses were from 213/16:06:07-213/16:12:42, and 216/18:17:52-216/18:25:20, respectively.

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 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: 234.0 of 500 hours
SRCA 10W Lamp #2: 168.7 of 500 hours
SRCA 10W Lamp #3: 180.3 of 500 hours
SRCA 10W Lamp #4: 64.9 of 500 hours

SRCA 1W Lamp #1: 566.6 of 4000 hours
SRCA 1W Lamp #2: 276.9 of 4000 hours

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