1. Revised optical air mass and approximation formula;Kasten;Appl. Opt.,1989
2. Measuring solar and angle-of-incidence effects on photovoltaic modules and solar irradiance sensor;King,1997
3. Parameterized transmittance model for direct beam and circumsolar spectral irradiance;Gueymard;Sol. Energy,2001
4. SMARTS2, a Simple Model of the Atmospheric Radiative Transfer of Sunshine. FSEC-PF-270-95;Gueymard,1995
5. High resolution atmospheric radiance-transmittance code (HARTCODE);Miskolczi,1990