METHOD OF FLIGHT ABSOLUTE RADIOMETRIC CALIBRATION USING PROBING SIGNAL Russian patent published in 2020 - IPC H04N5/365 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measurement equipment and method of flight absolute radiometric calibration. Method includes determination of output signals of a part of photosensitive matrix elements at their illumination with a reference optical signal, measurement of signals of dark currents of all elements of the matrix and recording of signals of all matrix elements at their illumination with an internal calibrator. For each element illuminated by the reference signal, the ratio of the output signal at illumination from the internal calibrator to the output signal from the reference source is determined, and the value of the amplitude of the internal calibrator is obtained. Then, for all elements of the matrix, calibration coefficients are determined, on which the difference in values of the output signals of all elements of the captured image and signals corresponding to dark currents is multiplied. Calibration coefficients are defined as the ratio of the difference between the output signal of the photosensitive element and the illumination with the internal calibrator and the output signal corresponding to the dark current to the value of the optical signal of the internal calibrator.

EFFECT: technical result consists in possibility of absolute radiometric calibration at illumination from internal calibrator and reduction of energy costs during calibration.

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