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Closed-Form Equation for the Duration of Daily Insolation on Uniformly Sloping Terrain

Hugo A. Loáiciga · International Journal of Environment and Climate Change · 2013

Aims: Derivation of a closed-form expression for the duration of the daily insolation on surfaces of arbitrary uniform slope and aspect located anywhere on Earth, anytime of the year. Study Method: It is shown that the sunrise- and sunset-hour angles and the duration of daily ins...