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Response of some Thematic Mapper band ratios to variation in soil water contentBidirectional reflectance to nadir in the reflective TM bands and the 1.15-1.3-micron band was measured in the laboratory as moisture content was varied in ten soils. Stronger absorption by water in TM5 and TM7 was expected to cause ratios of other bands to TM5 and TM7 to increase with water content, but in most cases these ratios were constant or decreased at low to intermediate water content and increased only at high moisture levels. Because these ratios were found to decrease as illumination elevation angle decreased, it was suggested that increased roughness resulting from the methods of moistening and mixing the soil may have tended to counteract the expected ratio increases.
Document ID
19870033399
Document Type
Reprint (Version printed in journal)
Authors
Musick, H. Brad (NASA Earth Resources Lab. Bay Saint Louis, MS, United States)
Pelletier, Ramona E. (NASA National Space Technology Laboratories Bay St. Louis, MS, United States)
Date Acquired
August 13, 2013
Publication Date
October 1, 1986
Publication Information
Publication: Photogrammetric Engineering and Remote Sensing
Volume: 52
ISSN: 0099-1112
Subject Category
EARTH RESOURCES AND REMOTE SENSING
Distribution Limits
Public
Copyright
Other