1. 1 Presented by Patrick Coronado ( Information provided by NASA/GSFC: Angie Kelly, Bill Guit, and Eric Moyer) Earth Observing System (EOS) Mission Status NOAA Direct Broadcast Conference April 6, 2011 Aqua Aura Terra

2. 2 Terra: Launch Date: December 18,1999 (Atlas IIAS, VAFB) Orbit: 705 km, sun-synchronous polar, 98.2 o  Inclination, 10:30 AM MLT descending node Instrument Payload: ASTER (SWIR, TIR & VNIR) (Japan); CERES (Fore & Aft) (USA – NASA LaRC); MISR (USA –NASA JPL); MODIS (USA – NASA GSFC); MOPITT (Canada) Aqua: Launch Date: May 4, 2002 (Delta, VAFB) Orbit: 705 km, sun-synchronous polar, 98.2 o  Inclination, 1:30 PM MLT ascending node Instrument Payload: AMSR-E (Japan); AMSU (USA –NASA JPL); AIRS (USA –NASA JPL); CERES(USA – NASA LaRC); HSB (Brazil); MODIS (USA – NASA GSFC) Aura: Launch Date: July 15, 2004 (Delta, VAFB) Orbit: 705 km, sun-synchronous polar, 98.2 o  Inclination, 1:45 PM MLT ascending node Instrument Payload: HIRDLS (UK/NASA/UCAR); MLS ((USA –NASA JPL); OMI (KNMI, Netherlands); TES (USA –NASA JPL) EOS Project Management: Earth Science Mission Operations (ESMO), NASA GSFC Mission Operations: NASA GSFC Instrument Operations and Science Data processing: Performed at respective Instrument Locations Science Data Processing: Level zero: EOS Data Operations System (EDOS); Level 1+: Various Data Centers and Investigator-led Processing Facilities in the US and International Partner Facilities EOS Terra, Aqua, and Aura Missions

3. 3 Terra Summary Spacecraft Status - GREEN Instrument Status - GREEN –ASTER: VNIR and SWIR nominal; SWIR ops ended 2008 –CERES: Operating Normally –MISR: Operating Normally –MODIS: Operating Normally –MOPITT: Operating Normally Data Capture/L0 Processing Status – GREEN –SSR Data Capture over life of the mission:~99.00 % Ground Systems – System Upgrades in progress –Implementing system changes and new back-up control center –No planned interruptions to operations –Completion in Summer 2011

4. 4 Terra has sufficient propellant to maintain Mean Local Time (MLT) of 10:30am +/- 1 minute through 2017 Terra can continue to operate through Summer of 2019 by allowing MLT to drift towards minimum MLT requirement of 10:15 am (established prior to launch) Terra Predicted Propellant Usage based on Nominal Solar Flux

5. 5 Aqua Mission 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 over life of the mission: ~ 99.97 % Data Latency – Excellent Ground Systems – System Upgrades in progress –Implementing system changes and new back-up control center –No planned interruptions to operations –Completion in Summer 2011

6. 6 Aqua Fuel Usage: Actual & Predicted Fall 2006 Delta-i Maneuvers Fall 2004 Delta-i Maneuvers Spring 2007 Delta-i Maneuvers Spring 2010 Delta-i Maneuvers (3) Annual Delta-i Maneuvers Spring 2018 Delta-i Maneuvers Ascent Maneuvers Spring 2009 Delta-i Maneuvers (9) Aqua spacecraft has sufficient fuel to maintain its current orbit within the Afternoon Constellation through FY2018 and possibly well beyond

7. 7 Aura Summary Spacecraft Status - GREEN Instrument Status - GREEN –HIRDLS: Not collecting science data – Chopper Stalled 03/17/08 –MLS: Operating Normally »Periodic Band 13 measurements »THz module currently in standby mode –OMI: Operating Normally »Field-of-View Anomaly started in September 2007 – currently stable –TES: Operating Normally Data Capture/L0 Processing Status – GREEN –SSR Data Capture over life of the mission:~99.99 % Ground Systems – System Upgrades in progress –Implementing system changes and new back-up control center –No planned interruptions to operations –Completion in Summer 2011

8. 8 Aura Fuel Usage: Actual & Predicted Spring 2010 Inclination Adjust Maneuvers (3) Spring 2018 Inclination Adjust Maneuvers Ascent Maneuvers Spring 2009 Inclination Adjust Maneuvers (9) Aura spacecraft has sufficient fuel to maintain its current orbit within the Afternoon Constellation through FY2018 and possibly well beyond

9. 9 Additional Information

10. 10 DateIncidentCauseResponse/Impact 6/15/2001MODIS Power Supply 2 failed Suspect a High Energy Particle was the cause of the thermal runaway condition damaging the Field Effect Transistors (FET) Switched to Redundant Power Supply. Redundant Power Supply has been nominal. 9/10/2002MODIS Formatter Side A Timing Errors corrupting Science (Degraded Performance) Formatter A has had a history of problems which resulted in processing errors. The likely cause of the Formatter Timing Errors is an incorrectly terminated clock signal. Fixed on Aqua. 9/10/02 MODIS Science data was affected. MODIS Formatter Swap to Side B was performed on 9/17/02. Since the switch, no Formatter Errors have been detected and the data quality is excellent. 5/29/2008Direct Access System Modulator prevented X-Band Electrical Power Conditioner (EPC) Side failed. Cause Unknown Switched to redundant side to restore X-Band capability. X-Band has been nominal since recovery. 10/13/2009Hex Bay Battery Assembly (BBAT) heater control failed on 4 of 9 heater groups and Cell #50 of 54 failed Suspect impact from Micro-Meteoriod or Orbital Debris (MMOD) Science is unaffected by anomaly. Modified battery management to account for loss of one cell, increased charge/discharge ratio and increased remaining five heater group temperature setpoints to keep cell temperatures above freezing. Note: Power Module Battery continues to operate nominally. Terra Anomaly* History * -- Significant anomalies

11. 11 Aqua Spacecraft Subsystems Command & Data Handling (CDH) – Nominal –Solid State Recorder (SSR) – only holds 2 orbits of data –SSR Anomaly (12/02/07) – fully recovered 01/28/09 Communications (COMM) – Nominal Electrical Power System (EPS) – Nominal –Battery Cell Anomaly (09/02/05) –Solar Panel #8 Thermistor #6 Failure (08/03/09) –Solar Array Offset (Reported 11/17/09, Corrected 06/29/10) Flight Software (FSW) – Nominal Guidance, Navigation & Control (GN&C) – Nominal Propulsion (PROP) – Nominal –Dual Thruster Module (DTM-2) Heater Anomaly (09/08/07) Thermal Control System (TCS) – Nominal All subsystems still configured to primary hardware

12. 12 Aura Spacecraft Subsystems Command & Data Handling (CDH) – Nominal –Solid State Recorder (SSR) Anomaly (December 4-18, 2007) »Returned Nov 2010 – Jan 2011 at reduced level – then subsided Communications (COMM) – Nominal Electrical Power System (EPS) – Nominal –Solar Panel Connector Anomaly (January 12, 2005) –Solar Array Offset (Reported 11/17/09, Corrected 06/29/10) –Array Regulator Electronics 5A Anomaly (March 11, 2010) »Simultaneously with GN&C Attitude Disturbance Flight Software (FSW) – Nominal Guidance, Navigation & Control (GN&C) – Nominal –Earth Sensor Assembly (ESA) Anomaly (May 29, 2009) »Recovered by re-calibration in Fall 2009 Propulsion (PROP) – Nominal –Dual Thruster Module (DTM-3) Anomaly (Aug 16, 2005) Thermal Control System (TCS) – Nominal All subsystems configured to primary hardware