RADAR MEASUREMENT OF SOIL MOISTURE CONTENT

The effect of soil moisture on the radar backscattering coefficient was investigated by measuring the 4-8 GHz spectral response from two types of bare-soil fields: slightly rough and very rough, in terms of the wave-length. An FM-CW radar system mounted atop a 75-foot truck-mounted boom was used to measure the return at 10 frequency points across the 4-8 GHz band, at eight different look angles (0 degree through 70 degree), and for all polarization combinations. A total of 17 sets of data were collected covering the range 4-36 percent soil moisture content by weight. The results indicate that the radar response to soil moisture content is highly dependent on the surface roughness, microwave frequency, and look angle. The response seems to be linear, however, over the range 15-30 percent moisture content for all angles, frequencies, polarizations, and surface conditions. /ARTHUR/

  • Corporate Authors:

    Institute of Electrical and Electronics Engineers (IEEE)

    3 Park Avenue, 17th Floor
    New York, NY  United States  10016-5997
  • Authors:
    • Ulaby, F T
  • Publication Date: 1974-3

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Filing Info

  • Accession Number: 00263202
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 12 1974 12:00AM