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Atmospheric-water absorption features near 2.2 micrometers and their importance in high spectral resolution remote sensingSelective absorption of electromagnetic radiation by atmospheric gases and water vapor is an accepted fact in terrestrial remote sensing. Until recently, only a general knowledge of atmospheric effects was required for analysis of remote sensing data; however, with the advent of high spectral resolution imaging devices, detailed knowledge of atmospheric absorption bands has become increasingly important for accurate analysis. Detailed study of high spectral resolution aircraft data at the U.S. Geological Survey has disclosed narrow absorption features centered at approximately 2.17 and 2.20 micrometers not caused by surface mineralogy. Published atmospheric transmission spectra and atmospheric spectra derived using the LOWTRAN-5 computer model indicate that these absorption features are probably water vapor. Spectral modeling indicates that the effects of atmospheric absorption in this region are most pronounced in spectrally flat materials with only weak absorption bands. Without correction and detailed knowledge of the atmospheric effects, accurate mapping of surface mineralogy (particularly at low mineral concentrations) is not possible.
Document ID
Document Type
Conference Paper
Kruse, F. A. (Geological Survey Lakewood, CO, United States)
Clark, R. N. (Geological Survey Lakewood, CO, United States)
Date Acquired
August 13, 2013
Publication Date
August 15, 1986
Publication Information
Publication: JPL Proceedings of the Second Airborne Imaging Spectrometer Data Analysis Workshop
Subject Category
Distribution Limits
Work of the US Gov. Public Use Permitted.
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