How do I calculate sky irradiance from radiance (L) from a hemisphere above a surface which is tilted relative to the normal (x=0,y=0,z=1). I have L as a function of zenith (0 to 180deg) and azimuth ...
I am trying to understand how to use radiometric quantities in a simple program to generate an image. I have studied radiometry and think I understand pretty well at radiant flux, irradiance, itensity ...
Are spectral quantities the same as photometric quantities? How do you pass from a radiometric quantity $R$ to the correspondent spectral quantity $R_λ$ I've been ask to pass from Irradiance to ...