Spectral raw data from the TreeTalker device are output as radiometrically uncalibratedand with the12 different spectral bandsnot directly comparableamong each other, hence hinderingthe retrieval of the real spectral signature from the observations. This report describes the methodology and results of experiments aimed at obtainingcustom calibration factors to convert the raw dataoutputfrom the TreeTalker spectrometer into values of radiative energy flux for each spectral band
