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Published byAubrey Ball Modified over 9 years ago
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TERRA satellite
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Orbits T=100 minutes Inclination Repeat time/track separation Off nadir allowed? Swath width Ascending/Descending, day/night Stereo possible?
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Satellite Resolution Spatial Spectral Radiometric Temporal
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Windows and absorption bands—who absorbs where
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Whether noise is a nuisance or a signal may depend on whom you ask. Physics Today, May 2003
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S/N ratio Pixel size Part of spectrum Bandwidth Active/Passive
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Energy at Satellite Reflected Emitted
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Revisit Times ASTER: 4 to 16 days (only on Terra) MODIS: 2 days (Terra and Aqua)
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MODIS
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ASTER, CERES, MISR, MODIS,MOPITT
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Figure 1: The demise of Landsat 7. Partial image of Railroad Valley, NV (Path 40, Row 33) showing pre-anomaly (top), post-anomaly without interpolation (middle), and post-anomaly with interpolation (bottom).
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SLAR—side looking airborne radar Same principals as side scan sonar
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Contrast 0-255 gray scale possible ~30 we can differentiate Use them most effectively
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IR “Best” How show?
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Color--Grayscale Normally amount of energy returned Exceptions –Thermal of clouds (weather satellites) –Side scan sonar imagery (history & technology)
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