Computes daylight pdt exposure
based on a predictive model of sun irradiance
Solar spectal irradiance is computed using a predictive model based on
current geolocalization and date/time; the model gives accurate results
for clear-sky conditions.
Sun spectra is weighted against PpIX in order to compute the fraction of total irradiance useful for
PDT activation.
The resulting dose in minutes is optimized for
the treatment protocol with Alafast
performance enhancement