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Record Details

Record 40 of 1015
A multi-frequency radiometric measurement of soil moisture content over bare and vegetated fields
Author and Affiliation:
Wang, J. R.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Schmugge, T. J.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Gould, W. I.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Glazar, W. S.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Fuchs, J. E.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Mcmurtrey, J. E., III(U.S. Science and Education Administration, Field Crops Laboratory, Beltsville, MD, United States)
Abstract: An experiment on soil moisture remote sensing was conducted during July to September 1981 on bare, grass, and alfalfa fields at frequencies of 0.6, 1.4, 5.0, and 10.6 GHz with radiometers mounted on mobile towers. The results confirm the frequency dependence of sensitivity reduction due to the presence of vegetation cover. For the type of vegetated fields reported here, the vegetation effect is appreciable even at 0.6 GHz. Measurements over bare soil show that when the soil is wet, the measured brightness temperature is lowest at 5.0 GHz and highest at 0.6 GHz, a result contrary to the expectation based on the estimated dielectric permittivity of soil-water mixtures and the current radiative transfer model in that frequency range.
Publication Date: Apr 01, 1982
Document ID:
19820047278
(Acquired Nov 30, 1995)
Accession Number: 82A30813
Subject Category: EARTH RESOURCES AND REMOTE SENSING
Document Type: Journal Article
Publication Information: Geophysical Research Letters; 9; Apr. 198
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Science and Education Administration; Beltsville, MD, United States
Description: 4p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: BRIGHTNESS TEMPERATURE; RADIOMETERS; REMOTE SENSING; SOIL MOISTURE; VEGETATION GROWTH; DIELECTRIC PROPERTIES; MICROWAVES; RADIATIVE TRANSFER
Imprint And Other Notes: Geophysical Research Letters, vol. 9, Apr. 1982, p. 416-419.
Miscellaneous Notes: p. 416-419
Availability Source: Other Sources
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