Abstract: High-precision self-calibration radiation reference source based on spontaneous parametric down-conversion was the research hotspot of satellite remote sensing calibration. The principle of two-channel self-calibration radiometer was introduced, and a set of experimental device was established, then the comparison of experimental verification was expanded with traditional radiometric standard detector. Monochromatic uniform radiance light source with 736.9nm laser was used by integrating sphere, then the radiance of the integrating sphere exit was measured by two-channel self-calibration radiometer and radiance standard detector respectively, the measured absolute radiances results were 4.69×10-9W/(sr?mm2) and 5.19×10-9W/(sr?mm2), so the relative deviation was 9.63%, the feasibility of the principle of two-channel self-calibration radiometer was verified.

Key words: radiation calibration, self-calibration radiometer, radiation standard detector, radiance, relative deviation