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Crop water-stress assessment using an airborne thermal scannerAn airborne thermal scanner was used to measure the temperature of a wheat crop canopy in Phoenix, Arizona. The results indicate that canopy temperatures acquired about an hour and a half past solar noon were well correlated with presunrise plant water tension, a parameter directly related to plant growth and development. Pseudo-colored thermal images reading directly in stress degree days, a unit indicative of crop irrigation needs and yield potential, were produced. The aircraft data showed significant within-field canopy temperature variability, indicating the superiority of the synoptic view provided by aircraft over localized ground measurements. The standard deviation between airborne and ground-acquired canopy temperatures was 2 C or less.
Document ID
19780037436
Document Type
Reprint (Version printed in journal)
Authors
Millard, J. P. (NASA Ames Research Center Moffett Field, Calif., United States)
Jackson, R. D. (NASA Ames Research Center Moffett Field, CA, United States)
Reginato, R. J. (NASA Ames Research Center Moffett Field, CA, United States)
Idso, S. B. (U.S. Department of Agriculture, Agricultural Research Service, Phoenix Ariz., United States)
Goettelman, R. C. (LFE Corp. Richmond, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1978
Publication Information
Publication: Photogrammetric Engineering and Remote Sensing
Volume: 44
Subject Category
EARTH RESOURCES AND REMOTE SENSING
Distribution Limits
Public
Copyright
Other