Patent ID: 8067738
Filing Date: 2011-11-29
Classification: G01J

Abstract:
1. A method for providing calibration information, comprising: scanning a field of view of an instrument in orbit around the Earth over at least one of the solar disk and the lunar disk, wherein the instrument includes at least one sensor; measuring an irradiance signal obtained by scanning the field of view of the instrument over at least one of the solar disk and the lunar disk; slewing the field of view of the instrument to the Earth; scanning the field of view of the instrument over a selected area of the Earth; measuring a radiance signal obtained by scanning the field of view of the instrument over the selected area of the Earth; obtaining a calibration coefficient by calculating a ratio of an integrated signal obtained by scanning the field of view of the instrument over the selected area of the Earth to an integrated signal obtained by scanning the field of view of the instrument over the at least one of the solar disk and the lunar disk.