EOS Terra and AquaMission Operations Status October 3, 2005

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EOS Terra and AquaMission Operations Status
October 3, 2005
International EOS/NPP Direct Readout Conference
Benevento, Italy

• Angelita (Angie) C. Kelly
• Science Interface Manager
• Earth Science Mission Operations (ESMO) Project
• NASA/Goddard Space Flight Center
• phone [phone]
• fax [phone]
• angelita.c.kelly_at_nasa.gov

Note Presentation material based on data from
the EOS Flight operations Team (Bill, Guit, Eric
Moyer, John Nidhiry, and Jamie Pawlowski)
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Topics

• Introduction
• Earth Science Mission Operations Project
• DB Operations
• Terra
• Overall Summary
• Major Activities/Maneuvers Completed in 2005
• Planned Activities
• MODIS Operations
• Aqua
• Overall Summary
• Major Activities/Maneuvers Completed in 2005
• Planned Activities
• MODIS Operations

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EOS Mission Operations

• The Earth Science Mission Operations (ESMO)
  Project/Code 428 at NASA Goddard Space Flight
  Center (GSFC) is responsible for mission
  operations of EOS Terra, Aqua, and Aura, and
  other Earth Science missions, e.g., UARS, TRMM.
• Earth Radiation Budget Satellite (ERBS) ---
  10/05/84
  
• Upper Atmosphere Research Satellite (UARS) ---
  09/12/91
  
• Total Ozone Mapping Spectrometer Earth Probe
  (TOMS-EP) --- 07/02/96
  
• Tropical Rainfall Measuring Mission (TRMM) ---
  11/27/97
  
• Landsat-7 --- 04/15/99 (USGS MO NASA
  Anomalies)
  
• Earth Observing System (EOS) Terra --- 12/18/99
• EOS Aqua--- 05/04/02
• Ice, Clouds, and Land Elevation Satellite
  (ICESat) --- 01/12/03
  
• Solar Radiation and Climate Experiment (SORCE)
  --- 01/25/03
  
• EOS Aura --- 7/15/2004
• ESMO coordinates with the EOS science teams and
  the GSFC Direct Broadcast (DB) community to
  satisfy user requirements.

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EOS End-to-End Data System
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Direct Broadcast (DB) Operations

• The Terra and Aqua satellites provide 15 Mbps
  X-Band DB data to users worldwide.
  
• DB is provided continuously except when the
  satellite is
  
• Configured for a TDRSS or Ground Network (GN)
  contact and
  
• Performing a 150 Mbps K-Band (Terra) or X-Band
  (Aqua) playback.
  
• The Aqua Flight Operations Team (FOT) maximizes
  DB operations by
  
• Delaying activation of the GN configuration by 60
  seconds for the NW continental U.S.
  
• Commanding the X-Band Modulator to 15 Mbps Direct
  Broadcast Mode after each X-Band Playback .
  
• Scheduling Wallops Ground Station (WGS) to
  receive only 1 Aqua pass and only during 0h-12h.

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Important Web Sites
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Earth Science Constellations
Morning Constellation
Afternoon Constellation
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Terra Status
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Terra Flight System Status Summary

• 1 SFE/KSAM data clock synchronization was lost
  on May 5th, 2005.
  
• 2 TCS TIR CPHTS temperature fluctuation on July
  5th, 2005. Returned to normal.
  
• 3 SSR PWA 28 (Supersets 54 55) Failure due to
  over-current protection on August 26th, 2005.
  
• 4 SFE-A LPM Card SEU (Tripped TMON 16) on
  September 23rd, 2005 at 143617z.

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Terra Instrument Status Summary

• 1 CERES AFT was intentionally commanded to a
  stowed configuration on July 1st to help
  understand degradation rate on the Terra Aqua
  CERES instruments. Returned to normal operations
  on September 1st.

Percentage data capture for fiscal year (Oct 1,
2004 9/30/05) 99.85
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Terra Spacecraft Major Activities in 2005

Jan 30 - Successfully completed 4.9 degree
MODIS Roll Maneuver Feb 17 - Uplinked EPGN RTCS M
odifications (corrected Inhibit-ID)
Feb 22 - Successfully completed a 10 sec Drag
Make Up Maneuver (2nd attempt 1st attempt
planned for 2/15/05 waived off due to Backup FDS
Hardware Failure). Feb 28 - Successfully complete
d 16.99 degree MODIS Roll Maneuver
April 8 - Solar Eclipse (No Impact)
June 9 - Successfully performed 10.127 second
Drag Make Up Maneuver June 25 - Successfully perf
ormed 15.667 degree MODIS Roll Maneuver
July 1 - CERES AFT configured to stow instrument
for 2 months July 25 - Successfully performed 7.
245 degree MODIS Roll Maneuver
Aug 23 - Successfully performed 6.81 degree
MODIS Roll Maneuver Aug 26 - Recovered from SSR P
WA 28 Anomaly Sept 15 - Successfully performed 7.
936 second Drag Make Up Maneuver
Sept 22 - Successfully performed -12.467 degree
MODIS Roll Maneuver Sept 23 - Responded to and Re
covered from SFE-A Anomaly
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Terra Spacecraft Upcoming Activities

Oct 3 - Solar Eclipse (No impact expected.
Oct 21 -15.06 degree MODIS Roll Maneuver
Nov/Dec - Three Inclination Maneuvers
Dec 31 - Leap Second Dec/Jan- Load Thruster Gain
Change to improve Thruster responsiveness.
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Significant Data Anomalies

• On May 5th, 2005 at 125/082454z, the SFE-A lost
  data clock synchronization with the K-Band Single
  Access Modulator
  
• Terra was near the SAA at time of sync loss.
• WSC could not lock on science data being
  downlinked via K-Band.
  
• Synchronization was regained at 100348z
• Same problem previously occurred on September
  4th, 2004
  
• SSR PWA 28 Failure Over-current Protection on
  8/26/05.
  
• Occurred at approximately 238/120000. Near
  North Pole Nadir Term Crossing into Day.
  
• Affected MODIS Buffer(Supersets 54 55) Moved
  affected Supersets to BadList on 8/26/05
  
• Similar symptoms as other PWA Failures
• SSR Data Module Unit (DMU) Recycle could
  potentially reset all failed PWAs and allow
  continued use
  
• SFE-A LPM Card Anomaly (SFE-A Off) on 9/23/05.
• Anomaly occurred at 266/143617 while in the
  South Atlantic Anomaly
  
• Onboard software turned off SFE-A. No science was
  recorded or transmitted
  
• Successfully recovered SFE-A started capturing
  science at 266/194637.
  
• Direct Broadcast restarted at 266/204005.

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MODIS Operations on TERRA

• September 2004 September 2005

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Terra MODIS Calibrations

• SRCA calibrations conducted on a regular basis.
• Only anomaly was on the one 10w special
  calibration on DOY 327.
  
• SDSM and Blackbody calibrations conducted
  biweekly.
  
• No anomalies.
• Lunar Calibration Rolls conducted monthly
• When the roll angle necessary is below 20 degrees.

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Terra MODIS Anomaly

• On November 22, 2004, DOY 327, during a special
  10W SpectroRadiometric Calibration Assembly
  (SRCA) calibration, the SRCA failed.
  
• Lamp 2 was being used for this calibration.
• Lamp 2 had been showing inconsistencies
• Replaced by lamp 4 for normal SRCA
  calibrations.
  
• The probable cause for the premature shutdown was
  the filament burning out. MODIS decided to not
  try to turn the lamp back on, since there was a
  spare lamp available.

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Terra MODISLunar Calibrations

• From September 2004 to September 2005 MODIS
  completed nine Lunar Calibrations on TERRA. All
  were successful.
  
• 47 - Oct.01, 2004
• 48 - Nov. 02, 2004
• 49 - Dec. 31, 2004
• 50 - Jan.30, 2005
• 51 - Feb. 28 2005
• 52 June 26, 2005
• 53 July 25, 2005
• 54 August 23, 2005
• 55 September 22, 2005

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• AQUA STATUS

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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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Spacecraft Subsystem Status Summary
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Major Activities in 2005

• 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
• 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 (see
  following charts)
  
• 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

• October 3rd Solar Eclipse 8
• Oct 9-11th CloudSat/CALIPSO Orbit Ascent
• Sep 29th CloudSat/CALIPSO NET OCT 26
• December 31st Leap Second
• TBD HSB Turn-On Test 14

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MODIS Operations on AQUA

• September 2004 September 2005

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MODIS Instrument Anomaly

• MODIS SRCA Anomaly
• May 17th at 137/010730 GMT
• During the 20W portion of the SRCA full spatial
  calibration
  
• Abnormal output from the calibration lamps
• June 28 2005, DOY 179
• MODIS conducted tests to determine which SRCA
  lamp had failed on DOY 137.
  
• Determined that 10 W lamp 3 had failed.
• Failure Review Board Formed to Investigate.
• Determined cause of the failure due to hot spot
• Similar to samples in pre launch testing.
• MODIS IOT has built new SCSs
• Conduct the SRCA calibrations without lamp 3
• September 26 2005, DOY 269.
• Conducted successful 20W radiometric calibration
• The impact to science data has been minimal
• SRCA data is used primarily for trending
• Not as an active calibrator.

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MODIS SRCA Usage

• Previous 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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Calibrations

• DOY 137 to 296
• SRCA calibrations to continue
• Were halted while the anomaly was under
  investigation
  
• SDSM and Blackbody calibrations continue biweekly
  
  
• No anomalies.
• Calibrations conducted quarterly
• No anomalies.
• Lunar Calibration Rolls conducted monthly
• When the roll angle below 20 degrees.

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MODIS Lunar Calibrations

• September 2004 to September 2005
• MODIS completed nine Lunar Calibrations on AQUA
• All were successful.
• 22 - Oct.23, 2004
• 23 - Nov. 22, 2004
• 24 - Dec. 21, 2004
• 25 - Jan.20, 2005
• 26 - Feb. 18 2005
• 27 - March 21, 2005
• 28 - April 19, 2005
• 29 - May 19, 2005
• 30 - June 17, 2005

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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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Acronym List