 The characteristic emission and absorption spectra serve to fingerprint or define the makeup of the feature that was observed.A radiometric plot represents the radiant intensity versus time; there can be plots at multiple bands or wavelengths.For each point along a time-intensity radiometric plot, a spectral plot can be generated based on the number of spectral bands in the collector, such as the radiant intensity plot of a missile exhaust plume as the missile is in flight.