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Line plots of OCO-2's first light spectra Footprint 2 (second from bottom) in each of the three spectral “stripes” shown in the first light spectra image are shown as line plots. These spectra have been converted from “data numbers” to physical units to facilitate a quick estimate of the instrument’s performance. Wavelength is expressed in microns across the X –Axis, and the spectral intensities are expressed in radiance units (photons/second/meter-squared/steradian/micron) on the Y Axis. The relative intensities, resolution, and contrast are consistent with results from pre-launch testing. NASA / JPL-Caltech