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Effect of Viewing Angle on Canopy Temperature Measurements with Infrared Thermometers 1
Author(s) -
Fuchs M.,
Kanemasu E. T.,
Kerr J. P.,
Tanner C. B.
Publication year - 1967
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1967.00021962005900050040x
Subject(s) - zenith , canopy , solar zenith angle , infrared thermometer , infrared , environmental science , range (aeronautics) , atmospheric sciences , thermometer , remote sensing , materials science , optics , physics , geology , biology , ecology , quantum mechanics , composite material
Crop surface temperatures were measured with infrared thermometers at various viewing angles and for a range of solar zenith angles. The temperature readings of crops with continuous and uniform canopies were not related to the above angles. In the case of open row crops, the side of the row facing the sun was 1 to 3 C warmer than the shaded side.