Based on the Gaussian Fitting Method to Derive Daily Evapotranspiration from Remotely Sensed Instantaneous Evapotranspiration

Table 4

Gaussian fitting results on ET measurements at EC17 on cloud-free days in June 2012.

Date	Fitting equation	R^2	RMSE (W/m^2)
June 7	ETfit = 6.7 + 437.6 ∗ exp(−0.049 ∗ (i − 13.56)^2)	0.92	12
June 8	ETfit = −4.89 + 423.2 ∗ exp(−0.045 ∗ (i − 14.132)^2)	0.92	12
June 9	ETfit = 4 + 454.5 ∗ exp(−0.057 ∗ (i − 14.16)^2)	0.94	9.6
June 11	ETfit = 2.2 + 439.5 ∗ exp(−0.045 ∗ (i − 14.10)^2)	0.93	11.5
June 15	ETfit = 0.68 + 342.2 ∗ exp(−0.045 ∗ (i − 14.30)^2)	0.94	8.7
June 16	ETfit = 4.8 + 367.2 ∗ exp(−0.044 ∗ (i − 14.20)^2)	0.93	10
June 19	ETfit = −14 + 414.7 ∗ exp(0.042 ∗ (i − 13.42)^2)	0.93	12
June 20	ETfit = −12 + 418.2 ∗ exp(−0.047 ∗ (i − 14.10)^2)	0.92	12
June 21	ETfit = 1.96 + 473 ∗ exp(−0.066 ∗ (i − 13.56)^2)	0.92	12
June 24	ETfit = −11 + 443.8 ∗ exp(−0.049 ∗ (i − 13.962)^2)	0.95	9
June 29	ETfit = −1.1 + 489.1 ∗ exp(−0.043 ∗ (i − 14.2)^2)	0.88	17.5
June 30	ETfit = −4.1 + 517.7 ∗ exp(−0.047 ∗ (i − 14.562)^2)	0.93	13