Mission Operations Status August 23, 2005

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Mission Operations Status August 23, 2005
EOS Aqua

• Bill Guit
• Aqua/Aura Mission Director - Code 581
• phone [phone]
• fax [phone]
• William.J.Guit_at_nasa.gov

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Topics

• Spacecraft Performance Summary
• Major Activities Completed in 2005
• Planned Activities
• Instrument Anomalies in 2005
• Overall Summary
• Additional Slides
• Maneuvers and Ground Track Error
• Propellant Usage
• Conjunctions by Week

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Aqua Spacecraft Subsystems

• Command Data Handling (CDH) Nominal
• Solid State Recorder (SSR) holds 2 orbits of
  data
• Communications (COMM) - Nominal
• Electrical Power System (EPS) Nominal
• ARE 4A continues to perform at lower level
• Battery Pressure slightly dropping
• Flight Software (FSW) - Nominal
• Guidance, Navigation Control (GNC) - Nominal
• Propulsion (PROP) - Nominal
• Thermal Control System (TCS) Nominal

All subsystems configured to primary hardware
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Spacecraft Subsystem Status Summary
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Major Activities in 2005

• Feb 2nd Aqua Operations returned to Horseshoe
  1
• Feb 2nd Star Tracker 1 Time Tag Error Patch
• Feb 8-9th CALIPSO Flight Ops Review _at_ LaRC
• Feb 10-11th Afternoon Constellation MOWG _at_ LaRC
• Mar 19th EPS State of Health (SOH) Test 3
• Mar 30th CERES Instrument Anomaly
• Apr 8th Solar Eclipse 7 (No Impact)
• Apr 11th SGS Declared RED
• Apr 14th AGS Declared RED

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Major Activities in 2005

• May 4th Aqua 3-Year Anniversary
• May 11th Drag Makeup Maneuver 21 waved off
• May 13th Drag Makeup Maneuver 21
• May 17th MODIS Instrument Anomaly
• Jun 28th CALIPSO Delta FOR _at_ LaRC
• Jul 6-7th CloudSat ORR _at_ KAFB
• Jul 19-20th CALIPSO/CloudSat TIM _at_ GSFC
• Jul 21-22nd AC MOWG _at_ GSFC
• Jul 25th EPS Working Group Meeting 4
• Jul 28th SGS Re-certified
• Aug 16-18th CALIPSO ORR _at_ CNES

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Planned Activities

• Sep 14-16th CS/CP/ESMO/CCS Joint OR Exercise
• Sep 22nd EPS State of Health Test 4 (_at_Equinox)
• Sep 29th CloudSat/CALIPSO NET LRD
• October 3rd Solar Eclipse 8
• Oct 9-11th CloudSat/CALIPSO Orbit Ascent
• December 31st Leap Second
• TBD HSB Turn-On Test 14
• TBD EEPROM Refresh is planned for 2005

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Instrument Anomalies
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CERES Instrument Anomaly

• CERES-Fore (FM4) Short-wave Channel Anomaly
• March 30th at 089/1842 GMT the Short-wave
  channel bridge balance electronics failed to
  update the bridge settings as the spacelamp value
  fell outside the established window of 50-200
  counts
• March 31st First Anomaly Team Meeting
• CERES-Aft (FM3) placed in Cross-Track Mode
• April 1st 14th Conducted various diagnostic
  tests
• April 15th CERES/ESMO Meeting _at_ GSFC
• April July CERES IOT FOT Adjust Bridge
  Balance
• June 28th CERES/ESMO Meeting _at_ LaRC
• July 19th CERES IOT adjusts sensor temperatures

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CERES Instrument Anomaly
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AMSU Instrument Anomaly

• AMSU A1-2 Noisy Bus Current Rise
• Since the beginning of May an increase in the
  daily maximum motor current for the scanner has
  been observed (see next slide - scan motor
  current trend)
• June 24th JPL reported anomaly in their Weekly
  Report
• July 28th AMSU Anomaly Team Kickoff Meeting
• JPL, GSFC (ESMO/POES), NGES NGST, NOAA and MIT
• ART concluded that the observed increase in scan
  motor current was indicative of normal wear and
  didnt warrant further investigation at this time
• IOT FOT will continue to monitor the
  performance
• ART will review the trends in 6-months

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Scan Motor Current Trend
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MODIS Instrument Anomaly

• MODIS SpectroRadiometric Calibration Assembly
  (SRCA) Anomaly
• May 17th at 137/010730 GMT during the 20W
  portion of the SRCA full spatial calibration
  there was abnormal output from the calibration
  lamps
• May 20th First Anomaly Team Meeting
• June 28th Lamp Test confirmed 10 Watt Lamp 3
  failed
• Terra (PFM) SRCA 10W Lamp 2 Failed (5/25/04
  172 hrs)
• Aqua (FM1) SRCA 10W Lamp 2 Inconsistent (4/14/03
  188 hrs)
• Aqua (FM1) SRCA 10W Lamp 3 Failed ( 5/17/05
  206 hrs)
• July 27th MODIS SRCA Lamp Failure Review Board
  Kickoff
• FRB tasked to complete its work by September 30,
  2005

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MODIS SRCA Usage

• Old SRCA calibration frequency
• Full Radiometric performed monthly
• 10W Radiometric performed monthly (Terra only)
• Full Spatial performed bimonthly
• Full Spectral performed quarterly
• New SRCA calibration frequency
• Full Radiometric performed monthly
• 10W Radiometric will no longer be performed
• Full Spatial performed quarterly
• Full Spectral performed 3 times a year

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MODIS SRCA Usage

• Terra SRCA usage per Lamp
• Aqua SRCA usage per Lamp

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Spacecraft Anomalies
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Open Spacecraft Anomalies

• SADA Potentiometer OPEN
• Noise observed on both POTs First observed in
  2003
• Anticipate Aqua FSW modification(s) will be
  required
• Noise exceeded FM threshold 7 times on 10/10/04
• FOT continues to monitor performance
• No current impact to operations
• ARE-4A Anomaly OPEN
• First observed on 8/13/04, then again on 9/9/04
  and 10/8/04
• FOT generated Anomaly Report in December 2004
• Discussed at Power Systems Review on 7/25/05
• FOT continues to monitor performance
• No current impact to operations

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Data Losses

• March 21st - 7m00s Hi Rate, 5m58s Lo Rate Science
  
• Operator Error
• April 16th - 12M58S Hi-Rate Science
• Two EPGN stations declared red
• April 22nd - 0.97S MODIS Data Gap
• Reported by EDOS
• May 26th - 4M54S Hi-Rate Science
• EPGN availability
• July 10th - 88M53S Hi-Rate Science
• EPGN limitations
• July 21st - 59S Hi-Rate Science
• EPGN problems

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Aqua Data Capture
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Summary

• Spacecraft Status - GREEN
• Instrument Status - GREEN
• AMSR-E, AIRS, AMSU, CERES MODIS
• Operations nominal Producing great science
• HSB Survival Mode since 2/5/2003
• Data Capture/L0 Processing Status GREEN
• SSR Data Capture to 06/30/2005 99.994466
• SSR Data Capture to 07/31/2005 99.989391
• Data Latency Excellent
• Ground Systems Performing well and are meeting
  and/or exceeding requirements

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Additional Charts- Maneuvers- Ground Track
Error - Propellant Usage- Conjunctions by Week
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Aqua Maneuvers - 2005

• Drag Make-Up Maneuvers
• Jan 12th DMUM 19
• Mar 9th DMUM 20
• May 13th DMUM 21
• Aug 3rd DMUM 22
• MODIS Lunar Calibration Maneuvers
• Jan 20th MODIS LCM 25
• Feb 19th MODIS LCM 26
• Mar 21st MODIS LCM 27
• Apr 19th MODIS LCM 28
• May 19th MODIS LCM 29
• Jun 18th MODIS LCM 30

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WRS Ground Track Error
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Propellant Usage

• Fuel has been used for a series of 6 ascent
  burns, 7 inclination maneuvers and 22 drag
  make-up maneuvers
• Drag Make-up Maneuver 22 performed Aug 3rd
  Nominal Performance
• Inclination maneuvers planned for Spring of 2007
• Adequate fuel reserves to meet six year design
  life

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Conjunctions by Week
Monitor Volume /- 2x25x25 km
Alert Volume /- 0.5x5x5 km