A new method for calibrating the spectral radiance responsivities based on integrating sphere principle is proposed.The effect of the uncertainties in measurements of bidirectional reflectance distribution function(BRDF) of the diffuser is eliminated and the calibration precision is evidently improved.Using this new method,the spectral radiance responsivities of the space-borne remote sensing limb imaging spectrometer is calibrated.The uncertainties of the calibration is analyzed,and the combined uncertaint...