Calibrating method traced to cryogenic absolute radiometer for solar irradiance spectroradiometer

To improve the observation precision of solar spectrum, a calibration method based on standard detector for a novel prism dispersion solar irradiance spectroradiometer was developed in the visible-near infrared bands. With the standard irradiance detector, and the uniform irradiance source acquired from the tunable laser-illuminated integrating sphere, the spectral irradiance responsibility of the spectroradiometer was traced to the cryogenic absolute radiometer in the 10 bands. The uncertainty of this method is better than 0.95%. The deviations with the standard lamp calibratin method traced to the blackbody are less than 4.67%, which validate the rationality of the radiometer standard transfer method for solar irradiance spectroradiometer.