Solar radiation estimates in Malaysia

The estimates of global solar radiation (Q) for principal towns in Malaysia are deduced from their sunshine data (S) using the simplest linear relationship between Q and S as developed by Anstrom. The coefficients of this relationship are obtained by linear regression method using daily radiation and sunshine data measured in three major towns. The computation shows that for a month during which extreme high and low daily sunshine durations occurred frequently, linear correlation tends to be poorer. The estimates for towns nearest to Thailand and Singapore show close agreement to the data for these countries.