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Fig. 3. Example differences between the reference canopy temperature and the predicted canopy temperatures for both the Gaussian difference method (Eq. [5]) and the scaled method (Eq. [4]). Data are from 1999 corn, Day of Year 205 using the mean temperature of the 30/240 treatment as the reference temperature, Tref. In (A), the temperature at 1230 h CST from the 28/160 treatment was used for the value of Trmt,t in Eq. [4]; and the mean temperature of the 30/240 treatment at the same time was used for the value of Tref,t. The value of Td in Eq. [5] at 1230 h CST was set equal to Trmt,t – Tref,t. In (B), the time for evaluation of Trmt,t and Tref,t was 1945 h CST. In both (A) and (B), the actual difference in canopy temperature between the 28/160 treatment and the mean temperature for the 30/240 treatment is shown for comparison.
