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EO-1 Instrument Overviews
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Excludes thermal channel 35 cm-1 constant
resolution
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EO-1 Spectral/Spatial Attributes
Ground Sample
Wavelength
Spectral
Sampling (nm)
Distance (m)
Band
(µm)
Pan
0.48 0.69

10
MS-1'
0.433 0.453

30
MS-1
0.45 0.515

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MS-2
0.525 0.605

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MS-3
0.63 0.69

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MS-4
0.775 0.805

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MS-4'
0.845 0.89

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MS-5'
1.2 1.3

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MS-5
1.55 1.75

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MS-7
2.08 2.35

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Hyperion/VNIR (60 bands)
0.4 1.0
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10.0
0.9 2.5
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Hyperion/SWIR (160 bands)
10.0
LEISA AC (256 bands) 0.89 1.6
2.8 9.0 250
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Advanced Land Imager Description
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MS/PAN Flight Module
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ALI Focal Plane Assembly
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Partially Assembled Flight ALI

• Telescope features
• 12.5 cm entrance pupil
• 15 x 1.26 field-of-view
• Telecentric, f/7.5 design
• Unobscured, reflective optics
• Silicon carbide mirrors
• Wavefront error 0.11 l RMS _at_ 633 nm

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ALI Flight Instrument
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Installation of ALI into Thermal Vacuum Chamber
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Image Reconstruction and Calibration MS Band 1
Reconstructed Raw Image
Calibrated Image
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Solar Calibration
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EO-1 Instrument Overviews
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Hyperion Imaging Spectrometer

• Convex Grating spectrometers with CCD VNIR and
  HgCdTe SWIR detectors (60µm pixels)
• 30m spatial and 10nm spectral resolutions over
  7.5km swath and 400-2500nm spectral range
• Multiple calibration options lamps, lunar,
  solar, ground imaging and laboratory
• Hyperspectral Imaging Capability to address Earth
  Science oriented community

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Hyperion Optical System
Grating Spectrometer
Telescope
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Hyperion in Vacuum Chamber
Hyperion
Ground Support Equipment
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Hyperion S/N Performance Prediction
Mid latitude, 30 albedo
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LEISA Atmospheric Corrector
Correction of multispectral surface imagery for
atmospheric variability (water and
aerosols). High spectral, moderate spatial
resolution (250m), large swath (180km)
hyperspectral imager using wedge filter
technology Spectral coverage of 0.89 - 1.6µm,
bands selected for optimal correction of high
spatial resolution images.
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AC Triple Sensor System
Atmospheric Corrector has three independent
sensors to cover 180km swath
Solar Illumination input provides calibration
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EO-1 and Landsat 7 Descending Orbit Ground Tracks
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AM Constellation Descending Orbit Ground Tracks
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SAC-C / EOS AM Constellation

• SAC-C to join Landsat-7, EO-1, and Terra in
  EOS orbit.
• WRS, 1015 am descending equatorial node, common
  ground track.
• Maintain orbit in conjunction with Landsat-7 /
  Terra Flight Operations.
• SAC-C and EOS to cooperatively exchange data.
• CONAE to receive real-time direct broadcast of
  Landsat and MODIS data.
• EO-1 to selectively down-link data to CONAE
  ground stations.
• CONAE to provide selected SAC-C data using
  conventional and direct broadcast capabilities.
• SAC-C and EOS to conduct cooperative scientific
  efforts
• Follow through on currently proposed scientific
  activities
• Solicit proposals to exploit synergies enabled by
  the constellation

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SAC-C / EOS Cooperative Activities

• Installation of Aeronet stations at Cordoba,
  Buenos Aires and up to 3 additional locations
  (assuming 1 US supplied and 2 Argentine acquired)
  in Argentina.
• Jointly operated EOS Validation Sites.
  Candidates include Rio Mayo (grassland), Las
  Chilcas (humid tall grass), Patagonia (steppe),
  and existing LTER sites.
• Jointly operated ground reference site for GPS
  atmospheric sounding. Equipment provided through
  State Department funds.
• Argentine participation in validation activities
  through the EO-1 Science Validation Team.
• Collaborative spacecraft navigation experiments.
• Jointly sponsored technical workshops.

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Hyperion Echo Effect
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Current Status

• Full characterizations (radiometry, polarization
  sensitivity and imaging) have been completed for
  all instruments
• Further characterization of ALI and Hyperion,
  based on internal lamp and dark current
  measurements, continue onboard spacecraft.
• Hyperion cross-calibrated by JPL and MIT/LL shows
  discrepancies.
• Spacecraft slated to be delivered from GSFC to
  WTR week of Thanksgiving, in time for January 17,
  2000 launch.
• ALI, Hyperion and AC, end-to-end and
  inter-comparison test is on.
• 115 NRA proposals have been reviewed. Upward of
  20 will be selected by end of October.
• Ungar, Holben and Ranson to attend NASA/CONAE
  Workshop Oct 18-20 in Buenos Aires to discuss AM
  Constellation opportunities
• MOU negotiated with SSC/CRSP for inclusion
  commercial Hyperion application investigations
  within the framework of the SVT.

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Performance ( other) Considerations

• ALI mirror scattering properties
• ALI within and between-SCA alignment
• Hyperion VNIR/SWIR non-alignment
• Hyperion SWIR ASP temperature sensitivity / dark
  drift
• Hyperion SWIR echo effect
• ALI / Hyperion inter-calibration discrepencies
• AC radiometric and geometric characterizations
• Spacecraft manuverability / solar and lunar cals
• WARP file handler limitations on acquisitons
• AM Constellation and early orbit opportunities