Study of the solar radiation over Menia

摘要

Meaurements were carried out at El-Menia (28.12 deg N, 30.55 deg E) in Egypt, which lies in the middle of Egypt, 244 km south of Cairo, for a compete year (1997). Measurements were taken using the Eppley pyranometer to measure the global solar radiation (G) in the range from 280 to 2800 nm, and the Eppley pyrhelionmeter, which measures the normal incidence solar radiation (I) in the range from 280 to 2800 mn along with four direct spectral bands measured using three cutoff Schott glass filters in the range B1 (280-530 mn), B2 (530-630 nm), B3 (630-695 nm) and B4 (695-2800nm).