A Simple Semi-Empirical Model for the Estimation of Photosynthetically Active Radiation from Satellite Data in the Tropics

Table 1

Schedule of data for the formulation of the model and model validation.

Station	Position		Formulation of the model	Model validation
	Latitude	Longitude
Chiang Mai	18.78°N	98.98°E	January, 2008–December, 2010	January–December, 2011
Nakhon Pathom	13.82°N	100.04°E	January, 2008–December, 2010	January–December, 2011
Songkhla	7.20°N	100.60°E	January, 2008–December, 2010	January–December, 2011
Ubon Ratchathani	15.25°N	104.87°E	January, 2009–December, 2010	January–December, 2011