Does anyone know a site, software, public API (or formula) to get the solar light spectrum on earth given the time of the day, day of the year, and earth meassurement position (lattitude, longitude)?
Basically I need to know sunlight spectrum in realtime, including UltraViolet and InfraRed part of the spectrum.
The clouds and other particles don't have to be taken into account, so basically, is there any way for calculating the angular incidence of the sun and thus the received light spectrum after being filtered by the atmosphere with the light incidence at the calculated angle?
Thanks in advance!