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am1weekly_2013-082_2013-088

 

 

MODIS IOT Terra Weekly Report
Mission Operations Days: 2013/082 through 2013/088
March 23, 2013 00:00:00 GMT to March 29, 2013 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)
Component State(s) Comment
Blackbody A On (290K); B Off Nominal Science Mode
Calibration Electronics A On; B Off Nominal Science Mode
Control Processor A On; B Off Nominal Science Mode
Nadir Door Unlatched, Open Nominal Science Mode
Space View Door Unlatched, Open Nominal Science Mode
Solar Diffuser Door Unlatched, Screened Permanent Configuration
FDDI Formatter A On; B Off Nominal Science Mode
FDDI Port A On; B Off Nominal Science Mode
FIFO Memory #1 & #2 On; #3 & #4 Off Nominal Science Mode
Format Processor A Off; B On Nominal Science Mode
Power Supplies #1 On, #2 Off Nominal Science Mode
PV VIS FPA A On; B Off Nominal Science Mode
PV NIR FPA A On; B Off Nominal Science Mode
PV SMIR FPA A On; B Off Nominal Science Mode
PV LWIR FPA A On; B Off Nominal Science Mode
PC LWIR FPA A On; B Off Nominal Science Mode
RC Outgas Heaters All 3 (CS, IS, OS) Off Nominal Science Mode
RC LWIR FPA Heater On (83K) Nominal Science Mode
RC SMIR FPA Heater Off Nominal Science Mode
Scan Assembly A On; B Off Nominal Science Mode
SDSM Off Nominal Science Mode
SRCA Off
  • 10W Lamps - 1, 4 (functional)
  • 10W Lamps - 2, 3 (non-functional)
  • 1W Lamps - 1, 2 (functional)
Nominal Science Mode
PS1 Survival Heater Enabled Nominal Science Mode
PS2 Survival Heater Enabled Nominal Science Mode
Timing Generator A On; B Off Nominal Science Mode
Flight Software Rev 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 Set none Nominal Science Mode
TMON 66 Disabled Nominal Science Mode
TMON 67 Disabled Nominal Science Mode
TMON 68 Enabled Nominal Science Mode
TMON 69 Disabled Nominal Science Mode
 

 

 This Week’s Completed MODIS Activities:

 
Saturday, March 23, 2013 
None
 
Sunday, March 24, 2013
None
 
Monday, March 25, 2013 
2013/084 21:02:27-21:02:56 ATC MOD_SRCA_9_8_2_SETUP_CC.1 
SRCA setup activity using 10W lamps 1 and 4, and 1W lamp 5, in constant 
current feedback mode 
2013/084 21:05:57-21:36:52 ATC MOD_OA19_SRCA_FULL_RAD.1 
OA-19: SRCA Full Radiometric Calibration. 
Data collection 21:21:18-21:36:51 (centered on S/C Night) 
S/C Night 21:11:54-21:45:27.
 
Tuesday, March 26, 2013 
2013/085 20:49:36-20:58:24 ATC MOD_OA16_SDSM_SCRN_NO_DOOR_A.4 
OA-16: SD/SDSM screened side A, no door movement.
 
Wednesday, March 27, 2013 
None
 
Thursday, March 28, 2013
None
 
Friday, March 29, 2013
None
 
This Week’s Scheduled MODIS Activities Not Completed:
 
2013/083 21:53:43-21:56:14 ATC MOD_OA27_PV_ECAL.3 
OA-27: Photovoltaic bands electronics calibration. 
Centered on S/C maximum latitude at 22:54:58.
This will be rescheduled at the first available time.
 
This Month’s Upcoming MODIS Events:
 
Calibrations for April 2013 will be a Lunar Roll (DOY 119), an SDSM Screened (DOY 106), and an SRCA Radiometric (DOY 112).
 
Maneuvers:
 
There was a Terra Drag Make Up Maneuver (DMU) #72 and Debris Avoidance Maneuver (DAM) #3 on DOY 083 (03/24/2013). Maneuver start time was 083/22:30:00 and maneuver end time was for 083/22:30:05. Burn duration for this maneuver was 3.248 seconds. The loss of pointing accuracy times were  083/21:29:00-23:46:40z.
 
The possible Terra Drag Make Up Maneuver (DMU) #73 and Debris Avoidance Maneuver (DAM) #4 on DOY 085 (03/26/2013) was waived – no DMU/DAM occurred on this day.
 
MODIS Anomalies: 
 
None
 
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:
 
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.
 
Following the Inclination Maneuver on DOY 2009/286 (10/13/09), Terra experienced a Hex Bay Battery (BBAT) cell #50 failure and simultaneously (or close to same time) experienced a Battery Heater Control Electronic anomaly which prevents controlling the temperature for 5 of the 9 heater groups within BBAT. Cell #50 has failed and is non-recoverable. Battery temperatures have stabilized and battery cell temperatures are within an acceptable range. Terra has a robust power system with two 54 cell batteries that feed a power control system that maintains a stable 120V spacecraft power bus even if multiple cells fail. At this point in time the Terra Battery Anomaly is not affecting science data collection and all MODIS systems are nominal. There has been little if any impact to operations since the issue began. All operations are nominal.
 
 
Limited Life Item Status:
 
SRCA 10W Lamp #1: 312.9 of 500 hours
SRCA 10W Lamp #2: 172.1 of 500 hours
SRCA 10W Lamp #3: 190.3 of 500 hours
SRCA 10W Lamp #4: 107.5 of 500 hours
 
SRCA 1W Lamp   #1: 587.6 of 4000 hours
SRCA 1W Lamp   #2: 282.0 of 4000 hours
 
Solar Diffuser Door: 2146 of 3022 Movements
Nadir Aperture Door: 540 of 1316 Movements
Space View Door: 443 of 1316 Movements