Research Article
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 | R2 | RMSE (W/m2) |
| 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 |
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