the eo-1 mission: hyperion data · hyperion hyperspectral imager the hyperion is a push-broom...
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The EO-1 Mission:Hyperion data
Based on material prepared by
Dr. P. S. Barry, TRW
Dr. J. Pearlman, TRW
August 14, 2001
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Earth Orbiter - 1 Mission
Three revolutionary land imaginginstruments on EO-1 are collectingmultispectral and hyperspectral scenes in coordination withLandsat-7. Detailed comparisons of the EO-1 and ETM+ images are being carried out to validate theseinstruments for follow-on missions.
The mission is a combination of technology demonstrations and application validations
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EO-1 Instrument Overviews
Parameters ALI HYPERION AC
Spectral Range 0.4 - 2.4 µm 0.4 - 2.4 µm 0.9 - 1.6 µm
Spatial Resolution 30 m 30 m 250 m
Swath Width 36 Km 7.6 Km 185 Km
Spectral Resolution Variable 10 nm 6 nm
Spectral Coverage Discrete Continuous Continuous
Pan Band Resolution 10 m N/A N/A
Total Number of Bands 10 220 256
EO-1
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Less Than 1 Minute
185 km
36 km 7.7 km
Landsat Multispectral Images (185 km @ 30 m)
705 km Altitude
Multispectral Images (36 km @ 30 m)
Hyperspectral Atmospheric Correction (185 km @ 125 / 250 m)
Grating-based Hyperspectral Images (7.5 km @ 30 m)
Landsat-7 EO-1
EO-1 orbit is one minute behind Landsat-7 covering the same ground track
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Hyperion Data Cube
Pushbroom configuration, entire swath width collected each frame sampled every 4.5 ms, or 223.4 frames/second.
Common fore-optics, dichroic filter reflects 400 nm to 1000 nm to the VNIR and transmits 900 nm to 2500 nm to the SWIR.
Gratings disperse light onto two focal planes
• Produces a three dimensional data cube 256x6925x242 in 30 seconds!
Time 6925 frames
field of view 256 pixels field of view
spectral range 242 bands
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EO-1 Sensor Swaths
N
Landsat 7ETM+
EO-1ALI
EO-1Atmospheric
CorrectorEO-1
Hyperion
NADIR Pointing
Hyperion Swath Width: 7.6 km
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Hyperion Image - Argentina
Hyperspectral Image Acquired Dec 1, 2000 (day 336)Color image produced using 3 bands in the VNIR
Blue = band 14 (488 nm)Green = band 20 (549 nm)
Red = band 38 (731 nm) (red shows areas of new spring growth)
Approx. 7.6 km wide x 65 km longNORTH
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Hyperion Hyperspectral Imager
The Hyperion is a push-broom imager with:
• 220 10nm bands covering the spectrum from 400nm - 2400nm
• 6% absolute radiometric accuracy• Image swath width of 7.6 km• GSD of 30 m at 705 km altitude• 16 day cycle orbit• 12-bit image data
• On year Life (2 year Goal)
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Hyperion Characteristics
225Frame Rate (Hz)
12Digitization (bits)
220Number of Spectral Bands
10Spectral Resolution (nm)
400 – 2400Wavelength Range (L1 data) (nm)
0.63Crosstrack FOV (deg)
0.043IFOV (mrad)
12Aperture (CM)
51Average Power (W)
49Weight (Kg)
39 x 75 x 66Volume (L x W x H, cm)
HyperionParameter
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Samples of of Hyperion SpectraEach Hyperion Spectrum represents the signal obtained from a 30 m x 30 m square region on the ground
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Cuprite – A Mineral Analysis
Hyperion TrueColor Image Hyperion SWIR
Endmember Spectra
Hyperion SWIR Mineral Map
Courtesy of Fred Kruse AIGLLC
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veg.
lava
smoke
Hyperion Spectra of Mt Etna Scene July 13th 2001
0
20
40
60
80
100
400 600 800 1000 1200 1400 1600 1800 2000 2200 2400
Wavelength
Rad
ian
ce (
W/m
2-u
m-s
r)
lava smoke vegetation
1639 nm 2226 nm1234 nm
Mt. Etna Sample Spectra