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Multisensor analysis of hydrologic features with emphasis on the Seasat SARSynthetic aperture radar (SAR) imagery of the Wind River Range area in Wyoming is compared with visible and near-infrared imagery of the same area. Data from the Seasat L-Band SAR and an aircraft X-Band SAR are compared with Landsat Return Beam Vidicon (RBV) visible data and near-infrared aerial photography and topographic maps of the same area. It is noted that visible and near-infrared data provide more information than the SAR data when conditions are the most favorable. The SAR penetrates clouds and snow, however, and data can be acquired day or night. Drainage density detail is good on SAR imagery because individual streams show up well owing to riparian vegetation; this causes higher radar reflections which result from the 'rough' surface which vegetation creates. In the winter image, the X-Band radar data show high returns because of cracks on the lake ice surfaces. High returns can also be seen in the L-Band SAR imagery of the lakes due to ripples on the surface induced by wind. It is concluded that the use of multispectral data would optimize analysis of hydrologic features.
Document ID
19810059140
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Foster, J. L.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hall, D. K.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 11, 2013
Publication Date
May 1, 1981
Publication Information
Publication: Photogrammetric Engineering and Remote Sensing
Volume: 47
Subject Category
Earth Resources And Remote Sensing
Accession Number
81A43544
Distribution Limits
Public
Copyright
Other

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