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Directional radiometric measurements of row-crop temperaturesThe variability of directional sensor response for a cotton row crop in Phoenix, Arizona was measured for various solar zenith angles. The geometric structure of the canopy was described with regard to height, width, spacing, and shape of rows. In addition, radiometric temperature data were collected on four scene components: sunlit and shaded vegetation and sunlit and shaded soil. These data were used to test the predictions and assumptions of a modified version of the row crop model of Jackson et al. (1979), which predicts the thermal infrared response of a sensor as a function of sensor view angle, component temperature, and geometrical structure of the canopy. The field data showed sensor response differentials as great as 16.2 C when going from a zenith view angle of 0 deg to one of 80 deg normal to the row direction. The rms deviation between the predicted and measured sensor response for all measurement periods and view angles was 0.96 C.
Document ID
19830054066
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kimes, D. S.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kirchner, J. A.
(NASA Goddard Space Flight Center Earth Resources Branch, Greenbelt, MD, United States)
Date Acquired
August 11, 2013
Publication Date
June 1, 1983
Publication Information
Publication: International Journal of Remote Sensing
Volume: 4
ISSN: 0143-1161
Subject Category
Earth Resources And Remote Sensing
Accession Number
83A35284
Distribution Limits
Public
Copyright
Other

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