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EO1 Science Validation Evolution

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Title: EO1 Science Validation Evolution


1
EO-1 Science Validation Evolution
  • Initial Concept
  • ALI including MS/PAN, the WIS, and the GIS
  • AC
  • De-scope
  • ALI (MS/PAN)
  • AC
  • Re-scope
  • ALI (MS/PAN)
  • Hyperion (GIS)
  • AC

2
Initial Concept
  • Validate MS/PAN and WIS for Landsat-follow-on and
    other future Mission To Planet Earth (MTPE)
    missions
  • Validate new ways of doing business visa-vi
    formation flying and calibration
  • Use GIS to evaluate spectral purity of WIS
  • Assess impact of applying AC-generated
    atmospheric corrections to contemporaneously
    obtained (within 1 minute) Landsat 7 ETM data

3
Descope
  • Validate MS/PAN for Landsat-follow-on and other
    future MTPE missions
  • Validate new ways of doing business visa-vi
    formation flying and calibration
  • Assess impact of applying AC-generated
    atmospheric corrections to contemporaneously
    obtained (within 1 minute) Landsat 7 ETM data

4
Rescope
  • Validate MS/PAN and Hyperion for
    Landsat-follow-on and other future MTPE missions
  • Validate new ways of doing business visa-vi
    formation flying and calibration
  • Evaluate utility of hyperspectral data for
    meeting needs of Earth Science Enterprises (ESE)
    community by addressing Lewis science mission
    objectives with Hyperion
  • Assess impact of AC-generated atmospheric
    corrections on Landsat 7 ETM data

5
EO-1 Coordinated Image Collection Opportunities
Excludes thermal channel
6
ALI Flight Validation
  • The ALI is a specific response to the Land Remote
    Sensing Policy Act wherein NASA is charged with
    ensuring Landsat data continuity through the use
    of advanced technology
  • EO-1 will provide at least 200 paired scene
    comparisons with Landsat 7
  • EO-1 flies within 1 minute of Landsat over the
    same ground track 3 km
  • Provision to collect up to 1,000 paired scenes
  • Continuous atmospheric correction available
  • Paired scene comparisons evaluated by experienced
    land imaging scientists in association with the
    Landsat Science Working Group

7
Hyperion Flight Validation
  • The Hyperion is a specific response to address
    the science and technology goals of the
    ill-fated Lewis mission
  • EO-1 will provide 7.5 km x 19.8 km x 220 band of
    spectral imaging data hyper-cubes
  • Hyperion is co-aligned with the innermost MS/Pan
    SCA on the ALI MS/Pan Module
  • Provision to collect up to 6,000 hyper-cubes with
    matching ALI MS/Pan and selected Landsat 7 data
  • Continuous atmospheric correction available
  • Paired scene comparisons evaluated by experienced
    land imaging scientists in association with the
    Landsat and AM-1 Science Working Groups

8
EO-1 Mission Overview
  • Primary Participants
  • Mission Components
  • ALI (MS/Pan) NASA Research Announcement (NRA)
    Investigators
  • Hyperion NRA, DOD, commercial
  • Atmospheric Corrector NRA, L-7, commercial
  • Technologies IPDT
  • Mission Phases
  • Launch to L2 months Spacecraft Team, MIT/LL,
    TRW
  • L 2 to L12 months NRA
  • Extended Operations (not funded) DoD, Commercial

9
Science Validation Activities
  • Validate the ability of the ALI to produce
    calibrated multispectral images of the Earths
    surface.
  • Evaluate Hyperion imaging spectrometer system
    performance for representative operating
    conditions and target environments.
  • Determine the potential for improving land
    surface identification by applying AC atmospheric
    water vapor corrections to Landsat-7 ETM
    observations.

10
Hyperion System Performance
  • Evaluate sensor characteristics for calibration,
    repeatability and impact of atmospheric
    conditions
  • Cross correlate with other EO-1 instruments and
    ETM
  • Investigate utility of high spectral and spatial
    Hyperion data in enhancing data from EOS/AM-1
    instruments
  • Demonstrate the applications of space-based
    imaging spectroscopy in landcover use and change
    analysis for both land mass and coastal regions

11
Sensor Performance Validation Topics
  • Cross-calibration with other EOS instruments
    (e.g., MODIS, ETM)
  • Characterize and analyze radiometric calibration
  • Efficacy of different calibration modes during
    the first year of orbit
  • Compare results of well characterized sites on
    Earth (vicarious calibration) with known or
    stable reflectance characteristics and
    well-determined atmospheric states
  • Derive ETM equivalent integrated spectral
    reflectance (band radiances) from the
    hyperspectral instrument and compare against
    Landsat spectral reflectance of ETM
  • Algorithm intercomparison studies
  • Theoretical measurement accuracy and validation
    measurements
  • Multiple or time series satellite algorithm
    development
  • Uncertainty analysis using basic physical and
    system equations
  • Physical process measurement validation
  • Landsat precursor operational satellite sensor
    validation

12
Sensor Performance Validation Topics(Continued)
  • Development of advanced physical-statistical
    validation methodology
  • Model impact analysis of remote sensing
    measurement errors
  • Establishment of statistical criteria for
    accuracy with multiple satellite sensors, orbits,
    observation times, and spectral coverages
  • Removal of satellite data artifacts and
    post-observation recalibration
  • Real-time calculation of direct broadcast data
    products and uncertainties
  • Alignment of detector/array alignment studies
  • Modulation transfer function (MTF) changes over
    time
  • Solar diffuser stability
  • Measure statistical response of MS/Pan and AC
    vs.. Landsat-7 ETM
  • Intersatellite calibration

13
Hyperion Science Application Topics
  • Produce Landsat-type products, e.g., spectral
    vegetation indices, closed/sparse canopy,
    thematic maps (urban studies), snow and land
    cover/land use change, land surface temperature
    (day/night), fire, thermal anomalies and burn
    scars
  • Assess the capability of MS/Pan to meet the needs
    of Landsat user community
  • Assess capabilities of MS/Pan and hyperspectral
    over the growing season to evaluate seasonal
    variations
  • Extract biophysical properties, e.g., fraction
    absorbed photosynthetically-active radiation
    (FPAR), leaf area index (LAI), and net primary
    production (NPP)
  • Study bi-directional reflectance distribution
    function (BRDF) and surface reflectance products
  • Determine surface spectral bi-directional
    reflectance corrected for atmosphere
  • Conduct regional field studies, field data
    campaigns

14
Mission Planning Overview
  • Coordinating Committee
  • Representatives from Science Working Group,
    Commercial Sector and Department of Defense
  • Adjudicates acquisition policy/priorities
  • Mission Planning Office
  • Implements mission planning activities
  • Serves as sole acquisition input to the FOT
  • Staffed by Mission Science Planning Office

15
Data Processing / Distribution
  • Science Validation Facility
  • Distributes all level-0 data to selected NRA
    Science Validation investigators
  • Produces MS/Pan Cal Pipeline data on demand
  • Provides in-house validation/analysis capability
  • NASA Stennis
  • Provides all Hyperion processing
  • Distributes Hyperion Level-0 data to all
    Commercial and DOD interests
  • Distributes processed Hyperion data to SVF, as
    well as Commercial and DOD interests

16
Backup Slides
17
SAC-C Science Synergy
  • December launch accommodates inclusion of Swedish
    Magnetometer Mapping Payload
  • EO-1 and SAC-C will cooperate as follows to
    promote NASA/Argentine research initiative
  • Collaborative research opportunities in remote
    sensing applications involving land use,
    atmospheric composition, and wet land habitats
  • Cooperative surface measurement program in
    Argentina, including the installation of Aeronet
    photometer stations for continuous monitoring of
    atmospheric aerosols
  • NASA to provide Landsat 7 / EO-1 land imaging in
    support of the above tasks
  • Argentine participation in the EO-1 NRA

18
Hyperion Performance Model Predictions (30
Reflectance, 60 Solar Zenith Angle)
19
Science Validation Facility (SVF)
  • Serves as the EO-1 Mission Science Office (MSO)
    validation analysis and investigator distribution
    center
  • Physically part of the GSFC Landsat-7 Project
    Science Office (LSPO) Image Assessment System
    (IAS)
  • Specifically will provide data distribution and
    ALI level 1 processing to NRA science
    investigators
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