The potential monthly solar irradiation
Bbo.solar_month module calculates solar irradiation summary for each month. It does not have any input files. Before starting this module, it is necessary to calculate the potential daily solar irradiation by the bbo.solar_day module.
Calculation is performed in solar mapset. Mapset is set automatically before calculation. The module assumes that the raster layers psr_d < xxx > contain potential daily irradiation. The module calculated solar irradiation summary for each month, and stores them in layers called psr_m < xx >, where xx is a two-digit number of the month.