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am1weekly_2001-363_2002-004

Mission Operations Days: 2001/363 to 2002/004
December 29, 2001 00:00:00 GMT to January 04, 2002 00:00:00 GMT


Terra Spacecraft and MODIS Instrument Status:

AM-1 "Terra" is in Normal Mode
PFM MODIS is in A-Side Science Mode
ComponentState(s)Comment
BlackbodyA On (290 K); B OffNominal
Calibration ElectronicsA On; B OffNominal
Control ProcessorA On; B OffNominal
Nadir DoorUnlatched, OpenNominal
Space View DoorUnlatched, OpenNominal
Solar Diffuser DoorUnlatched, ClosedNominal
FDDI FormatterA On; B OffNominal
FDDI PortA On; B OffNominal
FIFO Memory#1 & #2 On; #3 & #4 OffNominal
Format ProcessorA On; B OffNominal
Power Supplies#1 On, #2 OffNominal
PV VIS FPAA On; B OffNominal
PV NIR FPAA On; B OffNominal
PV SMIR FPAA On; B OffNominal
PV LWIR FPAA On; B OffNominal
PC LWIR FPAA On; B OffNominal
RC Outgas HeatersAll Off (CS, IS, OS)Nominal
RC LWIR FPA HeaterOn (83 K)Nominal
RC SMIR FPA HeaterOffNominal
Scan AssemblyA On; B OffNominal
SDSMOffNominal
SRCAOffNominal
PS1 Survival HeaterEnabledNominal
PS2 Survival HeaterEnabledNominal
Timing GeneratorA On; B OffNominal
Flight SoftwareRev BD + 3 set of patches
  • FR Error Counting (2 patches)
  • FR Band 5 Gain Change (20 commands)
  • FR BB Ideal Output Values (1 patch)
Nominal
Inhibit Ids SetNoneNominal
TMON 66DisabledNominal
TMON 67DisabledNominal
TMON 68EnabledNominal
TMON 69DisabledNominal

This Week's Completed MODIS Activities:

Saturday, December 29, 2001

None

Sunday, December 30, 2001

None

Monday, December 31, 2001

None

Tuesday, January 1, 2002

None

Wednesday, January 2, 2002

None

Thursday, January 3, 2002

MODIS Lunar Roll Maneuver (-1.9741 degrees)
2002/003 10:16:03 Real-time IRU set to High Rate (lower spacecraft attitude precision)
2002/003 10:46:22 ATC Formatter to Night Rate Set ahead by 03:23 to ensure 50/50 day/night data collection.
2002/003 11:13:14 ATC Formatter to Day Rate
2002/003 11:13:16 ATC SCIABNORM flag set to ABNORM
2002/003 11:13:18 ATC PV DCR computation to OFF
2002/003 11:13:20 ATC PC DCR computation to OFF
2002/003 11:13:22 ATC Sector rotation to 3072
2002/003 11:19:52 ATC Sector rotation to 0
2002/003 11:19:54 ATC PC DCR computation to ON
2002/003 11:19:56 ATC PV DCR computation to ON
2002/003 11:19:58 ATC SCIABNORM flag to NORM
2002/003 11:20:00 ATC Formatter to Night Rate
2002/003 11:28:03 Real-Time IRU set to Low Rate (greater spacecraft attitude precision)
2002/003 11:42:33 ATC Formatter to Day Rate Set later by 03:23 to ensure 50/50 day/night data collection.

Friday, January 4, 2002

None

This Week's Scheduled MODIS Activities Not Completed:

None

Upcoming Week's MODIS Events:

Sunday, January 6, 2002

2002/006 11:59:06 ATC OA-16: SDSM Screened
2002/006 11:59:06 ATC OA-16: SDSM Screened
2002/006 13:37:59 ATC OA-15: SDSM Open

Monday, January 7, 2002

2002/007 20:56:39 ATC OA-15: SDSM Open with SDSM mirror fixed at SD view
2002/007 22:35:31 ATC OA-16: SDSM Screened with SDSM mirror fixed at sun view

Terra MODIS calibrations for the month of January will include an SRCA Full Radiometric, SRCA Full Spatial, SRCA Full Spectral, Blackbody heating, and bi-weekly SDSM calibrations.

Maneuvers:

The next MODIS Lunar Calibration via a spacecraft roll maneuver is scheduled for February 3rd, 2002 (2002/032) with data collection from 20:19:21 to 20:25:51. The roll angle will be -3.4357 degrees.

A Drag Make-Up (DMU) maneuver is planned for the week of January 6th, 2002. The next inclination maneuver (2 of 6) is scheduled for January 16, 2002. For this second inclination maneuver, the MODIS doors will only be closed in the event of a failure to return to nominal pointing. A second DMU maneuver is planned for the week after the inclination maneuver.

The IOT has been notified that the Terra Deep Space Calibration Maneuver has been postponed once again. The maneuver is not expected to be performed until late summer of 2002 at the earliest. The reasoning for this delay was to allow the EOS Operations Center (EOC) time to adjust to operating Terra and Aqua spacecraft simultaneously.

MODIS Anomalies:

Formatter Error Events:

The formatter error rate has been fairly steady for the past few weeks with the counter rollover time approximately every seven hours and forty-five minutes.

Error tracking spreadsheets have been updated and can be retrieved from:

ftp://ftp.mcst.ssai.biz/ftp/pub/permanent/IOT/am1/analysis/FR_events/

An MS Excel spreadsheet called, AM1_FR_error_rollovers_MMDDYY.xls contains the data for the times each of the error count "roll over" occurs (with the MMDDYY denoting the date the spreadsheet was made, the more recent date containing the most up-to-date information).

General Instrument Comments:

MODIS is in Science Mode on the A-side with the SVD and NAD open, operating with the Formatter Resolution Flight Software Patches (FRFSP).

MODIS Telemetry Trends:

No abnormal telemetry trends are being observed.

Non-MODIS Significant Events:

Science Data Loss Reports can be viewed at:

http://jupiter02.gsfc.nasa.gov:591/ssrloss/

Select "Search Data Losses", and choose Data Type: MOD

Then press the big SUBMIT button.

Limited Life Item Status:

SRCA 10W Lamp #1: 192.8 of 500 hours
SRCA 10W Lamp #2: 147.2 of 500 hours
SRCA 10W Lamp #3: 156.4 of 500 hours
SRCA 10W Lamp #4: 61.5 of 500 hours

SRCA 1W Lamp #1: 558.6 of 4000 hours
SRCA 1W Lamp #2: 276.3 of 4000 hours

Solar Diffuser Door: 1781 of 3022 Movements
Nadir Aperture Door: 534 of 1316 Movements
Space View Door: 437 of 1316 Movements