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Record Details

Record 65 of 13099
Radar measurement of soil moisture content
Author and Affiliation:
Ulaby, F. T.(University of Kansas Center for Research, Inc., Lawrence, Kan., United States)
Abstract: The effect of soil moisture on the radar backscattering coefficient was investigated by measuring the 4- to 8-GHz spectral response from two types of bare-soil fields: slightly rough and very rough, in terms of the wavelength. An FM-CW radar system mounted atop a 75-ft truck-mounted boom was used to measure the return at ten frequency points across the 4- to 8-GHz band, at eight different look angles (0 through 70 deg), and for all polarization combinations. A total of 17 sets of data were collected covering the range from 4 to 36% 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 from 15 to 30% moisture content for all angles, frequencies, polarizations and surface conditions.
Publication Date: Mar 01, 1974
Document ID:
19740046300
(Acquired Dec 04, 1995)
Accession Number: 74A29050
Subject Category: GEOPHYSICS
Document Type: Journal Article
Publication Information: IEEE Transactions on Antennas and Propagation; AP-22; Mar. 197
Publisher Information: United States
Contract/Grant/Task Num: NAS9-10261; DAAK02-68-C-0089
Financial Sponsor: NASA; United States
Description: 9p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: BACKSCATTERING; CONTINUOUS WAVE RADAR; MICROWAVE SENSORS; MOISTURE CONTENT; RADAR MEASUREMENT; SOIL MOISTURE; FREQUENCY MODULATION; FREQUENCY RESPONSE; INSTRUMENT ERRORS; POLARIZATION CHARACTERISTICS; RADAR ECHOES; REMOTE SENSORS; SURFACE ROUGHNESS EFFECTS
Imprint And Other Notes: IEEE Transactions on Antennas and Propagation, vol. AP-22, Mar. 1974, p. 257-265.
Miscellaneous Notes: p. 257-265
Availability Source: Other Sources
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