Solar energy systems require detailed information concerning the availability of solar radiation. The total amount of solar energy depends upon the season of the year and sky conditions during day time. The performance calculations of solar energy systems are sometimes carried out on an hourly basis. To make such performance calculations for a system, it is necessary to have an idea of the hourly values of the radiation.The present article shows a methodology of calculation of the: solar altitude and azimuth angles at solar noon and sunrise and sunset times in any location in a specific day.
