Study On The Fast Simulation And Implementation For Sensing-Imaging Atmospheric Radiative Transfer

With the development of satellite remote sensing technology, the demand for high resolution remote sensing image is increasing in all fields. Improving the simulation speed is becoming a research hotspot due to the large amount of data in the remote sensing simulation of large scene. As an important component of imaging simulation, the simulation of atmospheric radiation transmission has a direct impact on the efficiency of the whole link remote sensing imaging simulation.Main purpose of this paper is to study remote sensing imaging simulation of the atmospheric radiative transfer. Aiming at two cases including the land surface-atmospheric and ocean- atmosphere, by researching the atmospheric radiative transfer theory, and combining with remote sensing imaging characteristics of a large area of the scene, two sets of fast simulation algorithms separately applicable for land surface and ocean atmospheric transmission are proposed. The main work of this paper includes three aspects:1) The theoretical study of atmospheric radiative transfer. This paper introduces the influence of atmosphere on the radiative transfer, analyzes the basic process of the radiative transfer and the theoretical equation of the atmospheric radiative transfer. 2) Research on fast simulation method of atmospheric radiation transmission based on MODTRAN. Proposing a fast simulation method using a simplified model of atmospheric radiation and a fast table lookup technique for atmospheric radiation transmission in order to make up for shortcomings of the slow speed of the general model MODTRAN. 3) Fast simulation method for ocean atmosphere radiative transfer. This paper analyzes the ocean- atmosphere and land surface- atmosphere radiative transfer similarities and differences, and presents a fast method for simulation of ocean-atmosphere radiative transfer based on the land surface- atmosphere radiative transfer simulation method. Finally, we conduct experiment using the actual sensing surface reflectance and ocean water parameters, whose results verified the validity and accuracy of the proposed fast method of atmospheric radiative transfer simulation.