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1 September 1991 Remote spectral identification of surface aggregates by thermal imaging techniques: progress report
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Abstract
The NASA thermal infrared multispectral scanner (TIMS) has been successfully used for the remote identification of a variety of soil and aggregate deposits in vegetated areas of two states. Over three million cubic meters of gravel deposits were identified from the imagery during a two-year period. Verification was accomplished by ground reconnaissance using drilling machinery provided by the United States Forest Service (USFS), and by ground instrumentation provided by NASA''s Science and Technology Lab. (STL). The method has been used to differentiate between fine- and coarse-grained soils, and gravel deposits. The deposits were found to have been naturally sorted according to grain size by depositional processes, providing each deposit with distinct spectral qualities. It was found that the masking effects of relatively dense vegetation were largely overcome by using imagery acquired at higher altitudes above terrain than 9000 m, due to loss of resolution of the finer detail. The mechanics of image resolution are discussed, a method of data analysis is described, and sample spectral signatures are illustrated.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Douglas E. Scholen, William H. Clerke, and Gregory S. Burns "Remote spectral identification of surface aggregates by thermal imaging techniques: progress report", Proc. SPIE 1492, Earth and Atmospheric Remote Sensing, (1 September 1991); https://doi.org/10.1117/12.45864
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