The reflectance data set observed by the channel -type automated instrument deployed in the Dun Huang Radiometric Calibration Site from September 2018 to September 2019

In order to meet the high-frequency on-orbit calibration requirements of the on-board load， the site automatic calibration technology is often used to invert the multi-spectral reflectance into the hyper spectral reflectance. We calculate the reflectance from Sept. 2018 to Sept. 2019 using a channel-type automated observation instrument deployed in the Dun Huang Radiometric Calibration Site. Furthermore we divide the data into several groups according to the difference in the solar zenith angles during the measurement process and employ the model of bidirectional reflectance distribution function (BRDF) for the consistency analysis of spectral shapes at different solar zenith angles.