A method and system for enhancing spectrometer function may include initially exposing an array of photosensors of the spectrometer to spectral radiation and recording a first data set of photosensor counts within a predetermined measurement range; making a plurality of successive exposures of the photosensors to the radiation, and for each, progressively increasing an intensity of the radiation from the previous exposure, recording counts from the photosensors within the predetermined measurement range, disregarding counts from photosensors that already have recorded counts within the measurement range from a previous exposure to the radiation to make a data set of measured counts, and rescaling the data set of measured counts to adjust for the increasing an intensity of the spectral radiation to form a rescaled data set; and stitching together the first data set and each rescaled data set of measured counts to form a resultant data set of spectral irradiance.