Hello,
Please I want to know if you don't think that "Diffuse Horizontal Radiation" should be corrected by "Diffuse Horizontal Irradiance" as we are working in W/m2 and that weather data are giving irradiance not radiance. (same thing for "Direct normal radiation" ).
This is situated in Help: "Weather data"=> "Weather data elements".
Thanks in advance for your answer,
Z