An error budget analysis of the vicarious calibration for visible to near infrared radiometers onboard satellites based on the reflectance based method

Abstract

An error budget analysis for the reflectance based vicarious calibration method is conducted. BRDF of the standard plaque for the reference of the surface BRDF measurement is measured and corrected in the calculation of Top of Atmosphere (TOA) radiance in the method. Sunphotometer for optical depth measurement is calibrated and corrected in the calculation of TOA radiance. It is found that approximately 3.9% of root sum square error can be achieved for the reflectance based vicarious calibration method.