Vicarious calibration of VNIR/SWIR bands of ASTER

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Surface reflectanceMeasure a large area of the test site related tonumerous pixels of the test sensorP Measurements of the upwelling radiance of the test siteare referenced to a standard of known reflectanceP Standard is characterized in the RSG’s laboratoryP Instrument is a commercially available spectrometer
Surface ReflectanceSpectral reflectance is the average of all data pointscollected over the entire siteP Area covered is 300 m by 80 mP Takes approximately30 minutes to collectthe data setP 480 spectra that areaverages of 20 samplesare collected! 8 spectra per 20 m! Reflectance standardsmeasured every64 spectra
Page 1: Vicarious calibration ofVNIR/SWIR b
Page 4 and 5: Why bother with vicarious?Radiance
Page 6 and 7: Vicarious approachesCurrent approac
Page 8 and 9: Reflectance-Based ApproachMeasuredS
Page 12 and 13: Surface reflectance
Page 14 and 15: Railroad Valley Test Site
Page 16 and 17: Lunar Lake test site
Page 18 and 19: Test site characteristicsTest site
Page 20 and 21: Recent results - ETM+Radiometric ca
Page 22 and 23: ASTER Band 1P Level 1B data do nots
Page 24 and 25: ASTER Band 3P Level 1B similar toBa
Page 26 and 27: 1.05Summary of resultsGraphs below
Page 28 and 29: Solar irradiance model effectsP AST
Page 30 and 31: AVIRIS predicting sensor radianceSh
Page 32 and 33: Coincident MODIS dataUsing ASTER an
Page 34 and 35: Cross-comparison resultsSummary of
Page 36 and 37: ConclusionsP ASTER VNIR bands! Bias
Page 38: ConclusionsP Current level of preci

Vicarious calibration of VNIR/SWIR bands of ASTER

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