Research Article
A Simple Semi-Empirical Model for the Estimation of Photosynthetically Active Radiation from Satellite Data in the Tropics
Table 2
Root mean square difference (RMSD) and mean bias difference (MBD) obtained from the comparison between calculated and measured hourly PAR values.
| Time | Chiang Mai | Ubon Ratchathani | Nakhon Pathom | Songkhla | Combined data | MBD (%) | RMSD (%) | MBD (%) | RMSD (%) | MBD (%) | RMSD (%) | MBD (%) | RMSD (%) | MBD (%) | RMSD (%) |
| 8:30 | | 19.4 | 0.0 | 13.4 | | 17.0 | | 15.0 | | 16.1 | 9:30 | | 16.1 | | 12.0 | | 13.4 | | 14.5 | | 14.1 | 10:30 | | 12.3 | | 8.8 | | 9.2 | | 14.9 | | 11.6 | 11:30 | | 10.4 | 0.7 | 9.8 | | 9.9 | | 12.1 | | 10.6 | 12:30 | | 8.2 | 3.6 | 11.3 | | 8.6 | | 16.1 | | 11.2 | 13:30 | | 12.0 | 3.8 | 10.8 | | 8.7 | | 15.4 | | 11.9 | 14:30 | | 18.0 | 6.5 | 18.7 | | 11.6 | | 13.7 | | 15.9 | 15:30 | | 17.4 | 3.1 | 16.6 | | 16.8 | | 16.8 | | 17.1 | 16:30 | | 25.2 | | 26.1 | | 27.4 | | 29.8 | | 27.2 | All hours | | 14.2 | 1.1 | 13.4 | | 12.5 | | 16.0 | | 14.3 |
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