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Infrared-temperature variability in a large agricultural fieldDunnigan Agro-Meteorological Experiment airborne thermal scanner images of a large varying-terrain barley field are acquired and analyzed. Temperature variability that may occur within instantaneous fields of view (IFOV) is defined (coefficient of variation: standard deviation/mean temperature in degrees C), and the percentage of the area within various IFOV's within + or - 1, 2, 3, and 5 degrees of the mean is determined. With the exception of very rugged terrain, over 80% of the area within 4, 16, 65 and 258 ha cells was at temperatures within + or - 3 C of the mean cell temperature. Remote measurements of field temperature appeared to be slightly influenced by pixel size in the range 4 ha to 259 ha, and the area percentage within any pixel which contributes within + or - 1, 2, 3, and 5 degrees C of the mean, is nominally the same. In conclusion, no great advantage is found in utilizing a small IFOV instead of a large one for remote sensing of crop temperature.
Document ID
19810061028
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Millard, J. P.
(NASA Ames Research Center Moffett Field, CA, United States)
Goettelman, R. C.
(EAL Corp. Richmond, CA, United States)
Leroy, M. J.
(DCA Corp. Palo Alto, CA, United States)
Date Acquired
August 11, 2013
Publication Date
September 1, 1981
Publication Information
Publication: International Journal of Remote Sensing
Volume: 2
Subject Category
Earth Resources And Remote Sensing
Accession Number
81A45432
Distribution Limits
Public
Copyright
Other

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