NAST-IER NAST-IER NPOESS Airborne Sounder Testbed NPOESS Airborne Sounder Testbed July 10-11, 2003 July 10-11, 2003 NASA LaRC, Hampton, VA NASA LaRC, Hampton, VA Stephen A. Mango Stephen A. Mango Chief Scientist Chief Scientist NPOESS Integrated Program Office NPOESS Integrated Program Office National Polar-orbiting Environmental Operational Satellite System (NPOESS)
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National Polar-orbiting Environmental Operational Satellite System (NPOESS)
National Polar-orbiting Environmental Operational Satellite System (NPOESS). NAST-IER NPOESS Airborne Sounder Testbed July 10-11, 2003 NASA LaRC, Hampton, VA Stephen A. Mango Chief Scientist NPOESS Integrated Program Office. Why this Meeting ?. NPOESS. Needs an Airborne Sounding - PowerPoint PPT Presentation
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- Testbed for Risk Reduction - Calibration/Validation System
i.e. a NAST !!!• Needs a NAST for the Duration of the Program (~2025) to
accomplish Cal/Val Requirements !!![to help accomplish Pre-Launch Risk Reduction/Verification of Concepts and the Post-Launch immediate intensive Cal/Val activities, the intermittent and the sustaining Cal/Val activities throughout the mission]
• Present NAST System- Probably CAN NOT- Realistically SHOULD NOT
• Contract was awarded on August 23, 2002 to TRW (now Northrop Grumman ST) for $4.5B
• Contract consists of:- 6 satellites (3 Orbits-one satellite + a replacement /orbit) - Taking over all government instrument contracts- Buying all “leveraged” instruments- Integrating GFE instruments (ADCS and SARSAT)- Building and deploying all ground systems
• C3 and data retrieval• Data processing hardware and software
- Software for worldwide users• Operating system through IOC (2011)
- with option to 2019 ~2018 + 7 yr Lifetime = ~ 2025
Environmental Data Records (EDRs) with Key Performance Parameters
Cloud Top Pressure Cloud Top Temperature Downward Longwave Radiance (Sfc) Downward Shortwave Radiance(Sfc) Electric FieldElectron Density ProfileEnergetic Ions Geomagnetic Field Ice Surface TemperatureIn-situ Plasma Fluctuations In-situ Plasma Temperature Ionospheric ScintillationMedium Energy Charged Particles Land Surface Temperature Net Heat FluxNet Solar Radiation (TOA) Neutral Density Profile Color/ChlorophyllOcean Wave Characteristics Outgoing Longwave Radiation (TOA) Ozone - Total Column/Profile
Precipitable Water Precipitation Type/Rate Pressure (Surface/Profile) Sea Ice CharacterizationSea Surface Height/Topography Snow Cover/Depth Solar Irradiance Supra-Thermal-Auroral ParticlesSurface Type Wind Stress Suspended Matter Total Water Content Vegetation Index
Atmospheric Vertical Moisture ProfileAtmospheric Vertical Temp ProfileImagerySea Surface TemperatureSea Surface WindsSoil MoistureAerosol Optical ThicknessAerosol Particle SizeAerosol Refractive IndexAlbedo (Surface)Auroral BoundaryAuroral Energy DepositionAuroral ImageryCloud Base HeightCloud Cover/LayersCloud Effective Particle SizeCloud Ice Water Path Cloud Liquid Water Cloud Optical ThicknessCloud Particle Size/Distribution Cloud Top Height
NPOESS/NPP Data ProductsRaw Data Records (RDRs)
Similar to Level 1A for CEOS/NASA.~ 150 giga bytes per day (similar to Terra or Aqua).
Sensor Data Records (SDRs)Similar to CEOS/NASA Level 1B
Environmental Data Records (EDRs)Similar to CEOS/NASA Level 2.
• Ready for NPP Launch (~ early 2007)• Necessary Steps in NAST-IER Development/Shakedown• Implies 4 years of FY Funding, FY04-FY07, at best• What Missions must be accomplished with present system
during this 4-year period ???????(consistent with “Mission Driven Principle”)
NAST-I or S-HIS : Scanning Michelson InterferometerNAST-I or S-HIS : Scanning Michelson Interferometer• 9000 or 4500 Spectral Channels: 3.5 – 16, or 25, microns “for CrIS”“for CrIS”• 45 km swath (2.5 km nadir resolution from 65 kft)
MAS : MODIS Airborne SimulatorMAS : MODIS Airborne Simulator• 50 Spectral Channels (0.55 – 14.2 Microns); 25 SW, 25 IR “for VIIRS”“for VIIRS”• Spatially Scanning ( 40 km Swath/50 m res. from 65 kft)
CLS : Cloud LIDAR SystemCLS : Cloud LIDAR System• 2 Spectral Channels (0.532 and 1.064 Microns) “for Sounders, Clouds & “for Sounders, Clouds & • Nadir Viewing (20 m horizontal resolution from 65 kft) Aerosols”Aerosols”
Performance:Performance:• Ceiling 65-80 Kft (50.5Kft demonstrated to date)• Airspeed 300 ktas• Endurance 22 hrs (15.8 hrs demonstrated to date)• Operating Altitude: 100 to 65000 ft (Can Profile) Maximum Payload:Maximum Payload: > 4500 lbsRunway RequiredRunway Required: 3000 ft by 50 ftSeatsSeats: pilot, co-pilot, and scientist / sensor operator; cabin pressurized to 7000 ft
NAST-I : Scanning Michelson InterferometerNAST-I : Scanning Michelson Interferometer• 3.5 - 16 microns (spectral resolution = 0.25 cm-1)• 45 km 13 element swath (2.5 km resolution from 65 Kft)NAST-M : 16 Channel Microwave SpectrometerNAST-M : 16 Channel Microwave Spectrometer• 50-60 GHz and 113 -119 GHz ( 2300-6000 microns)• 65 km continuous swath (2.5 km resolution from 65 Kft)FIRSC : Far Infrared Michelson InterferometerFIRSC : Far Infrared Michelson Interferometer• Far IR (75-125 microns & 285-1000 microns @ 0.1 cm-1)• Nadir along track viewing ( 1.0 km resolution from 65 Kft) MicroMaps : Gas Filter Correlation RadiometerMicroMaps : Gas Filter Correlation Radiometer• 4.6 micron, CO profiling• Nadir along track viewing ( 1.0 km resolution from 65 Kft)
Strawman NAST-IER Mid-IR RequirementsSpectral Limits (SL): 3.5 to 15 m
Spectral Resolution (SR): Selectable from 0.25 to 1.25 cm-1 Field of Regard (FOR): 2 km from 20 km flight altitude
Ground Resolution (GR): Contiguous at 500 meters from 20 km flight altitude within a single FOR
Cross-track Scan Coverage (CTSC): Selectable from 2.0 km to 20 km, depending on spectral resolution, from 20 km flight altitudefor an aircraft speed of 400 kts
Along-track Scan Coverage (ATSC): FOR contiguity at 20 km for an aircraft speed of 400 kts
Noise Equivalent Temperature (NedT): Spectrally random brightness temperature error 0.25K @ 0.25 cm-1 spectral resolution within the spectral range of 4.5 to 14 m for a scene temperature of 260 K
. Absolute Error (AE): Absolute brightness temperature error 0.5K within the spectral range of 4.5 to 14 m for scene temperatures
Strawman NAST-IER Mid-IR Requirements (cont.)Scan Angle Coverag (SAC): Selectable over a range from Zenith
(180) to Horizontal (at either + or - 90) to any combinationof a set of viewing angle steps which together provide contiguous coverage over a range from 50 degrees about Nadir (0).