 The operational land imager OLI has been successfully tested prior to launch and its performance meets the requirements set forth by NASA. The spectral response of the OLI has been characterized both at the component and assembly levels, as well as through analysis of on-orbit imagery. The results show that the spectral response of the OLI is within acceptable limits and that the spectral crosstalk between the different bands is minimal. This article is authored by Julia A. Barcy, Kenton Lee, Gear Creran, and others.