A continuing problem with the interpretation of synthetic aparture radar (SAR) data, especially in the image format, is the fact that such radar systems generally are not calibrated. This tends to reduce the validity of computer processing in the form of automatic interpretation as it may be applied to SAR imagery. However, for some classes of targets, i.e., those which have especially constant and high or low returns, such automatic discrimination can be attained easily and quickly by digitally filtering and thresholding the data. We have applied such procedures to two scenes, one of sea ice and the other of fresh-water lakes. The orientation of loads (through a Fourier transform) together with the percentage of open water in the entire sea ice scene is quickly attained. For the lake scene the areas of lakes were determined with a high accuracy by using the standard library routines in a General Electric Image 100 system. These techniques demonstrate the validity of machine processing for obtaining quantitative data for some classes of targets as seen by uncalibrated synthetic aperture radars. /Author/

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  • Corporate Authors:

    American Society of Photogrammetry

    105 North Virginia Avenue
    Falls Church, VA  United States  22046
  • Authors:
    • Bryan, M L
    • Stromberg, W D
    • Farr, T G
  • Publication Date: 1977-10

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  • Accession Number: 00167905
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 16 1978 12:00AM