Global horizontal irradiance clear sky models : implementation and analysis.

  title={Global horizontal irradiance clear sky models : implementation and analysis.},
  author={Joshua S. Stein and Clifford W. Hansen and Matthew J. Reno},
Clear sky models estimate the terrestrial solar radiation under a cloudless sky as a function of the solar elevation angle, site altitude, aerosol concentration, water vapor, and various atmospheric conditions. This report provides an overview of a number of global horizontal irradiance (GHI) clear sky models from very simple to complex. Validation of clear-sky models requires comparison of model results to measured irradiance during clear-sky periods. To facilitate validation, we present a new… Expand
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