1. A system, comprising: a solar radiation receiver; a plurality of mirrored reflectors that are positioned to concentrate solar radiation onto the solar radiation receiver; a computing apparatus that receives: a first electronic image of the solar radiation receiver that comprises a first plurality of pixels having a first plurality of values; and a second electronic image of the Sun that comprises a second plurality of pixels having a second plurality of values, wherein the computing apparatus comprises computer-executable instructions that, when executed by a processor of the computing apparatus, generates values that are indicative of solar irradiance on a surface of the solar radiation receiver at positions corresponding to the first plurality of pixels based at least in part upon the first plurality of values and the second plurality of values.