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Remote Sensing
What can we do with it?
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The early years
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Yellowstone Fires 1988, Recorded 7/2001
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How it worksHow it works
Incoming solar energy
Reflecting surfacesScatter, absorb,and reflect light
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Electromagnetic EnergyElectromagnetic Energyand surface reflectanceand surface reflectance
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Spectral ReflectanceSpectral Reflectance
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Progression of common satellitesProgression of common satellitesMSS spatial scale 20m, TM 30mMSS spatial scale 20m, TM 30m
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Satellite SensorsSatellite SensorsSatelliteSatellite Spatial ResolutionSpatial Resolution Spectral ResolutionSpectral ResolutionQuickBirdQuickBird 1-4meters1-4meters .45-.90µm.45-.90µmIkonos1&2Ikonos1&2 1-4meters1-4meters .45-.90µm.45-.90µm
SPOTSPOT HR-XSHR-XS 10-20meters10-20meters .51-1.75µm.51-1.75µm
LANDSAT TM 7LANDSAT TM 7 (1)(1) 15m15m .45-.515µm.45-.515µm(2,3,4,5,7) 30m(2,3,4,5,7) 30m .525–2.35µm.525–2.35µm(6)(6) 60m60m 2.09-2.35µm2.09-2.35µm
AVRISAVRIS 20m20m 224 bands224 bands
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Sun Synchronous Orbital Flight Row and Path
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TM 30 meter multi-spectral imagery
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Keweenaw Peninsula, bands 2, 3 and 4 provide a color composite
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Summer AVHRR CompositeSummer AVHRR Composite Spatial Scale 1kmSpatial Scale 1km
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New Technologies
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AVRIS Spectra
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AVRIS Hyperspectral Cube
Airborne Visible/Infrared Airborne Visible/Infrared Imaging Spectrometer Imaging Spectrometer
224 spectral channels 224 spectral channels
400 – 2500 nm spectral 400 – 2500 nm spectral resolution, resolution,
20 meter ground 20 meter ground resolution.resolution.
Brine Shrimp pondBrine Shrimp pond
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LidarLight Detection and Ranging
Visible portion of spectrumExcellent opportunities for vertical dimensions not for horizontal
Data from Lefsky et al