Utility of satellite LIDAR waveform data in shallow water
Battaglia, Neal F.
Olsen, Richard C.
Trask, David M.
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Data from the CALIPSO satellite are analyzed for their ability to provide information about water depth. The CALIPSO LIDAR operates at 532 and 1064 nm. The 532-nm sensor measures both total power and the perpendicularly polarized intensity. Transects are studied from three geographic areas; Kure Atoll (near Midway), the Bahamas, and Sequoia National Forest. Differences in the data for two wavelengths and polarization for the 532-nm light were examined. The cross-polarized return at 532 nm was found to be strongly related to water depth. Results are compared with depth information determined by the brightness in Landsat imagery. Shallow water areas are seen to have a specific LIDAR signature based upon the ratios of backscattered light.
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