### Research on radiative transfer chain for proper satellite radiometric calibration

CHEN Xuan，QI Wenwen，XU Peng*

1. Key Laboratory for Advanced Optical Remote Sensing Technology of Beijing, Beijing Institute of Space Mechanics & Electricity, Beijing 100094, China
• Received:2017-10-10 Accepted:2018-01-15 Online:2018-03-25 Published:2020-02-12

Abstract: In order to further improve the quantitative application of remote sensing information and increase on-orbit radiometric calibration accuracy and frequency, an absolute radio metric calibration method of full-band, full-aperture based on proper satellite was presented. The method is suitable for the visible-near infrared spectrum, and the radiation standard in the radiative transfer has the SI-traceability. By comparing the advantages and disadvantages of the existing calibration methods, and the proper satellite radiometric calibration, the radiation standard traceability of the proper satellite was analyzed and the radiative transfer model from the sun to the proper satellite, then to the remote sensor was established. Taking GF-1 and GF-2 satellites as remote sensors under calibration, the simulation of the calibration constraints was acquired and the uncertainty of the proper satellite radiative transfer is about 1.3%. The simulation results verify the feasibility of the proper satellite calibration and provide a basis for the improvement of the radio metric calibration for the satellite remote sensors.