Research on Factors of the Availability of Remote Sensing Images and the Assessment Model Based on the Structure of Clouds

This paper studies influencing factors on the structure of clouds and the availability of satellite remote sensing images on base of that, and puts forward that the cloud area, cloud thickness and cloud fragment are the main factors. Combined with immune coding algorithm, the cloud area can be calculated; with the impact patterns on images by atmospheric scattering, refraction, and so on, a method of calculating the thickness of clouds is proposed; by analyzing the effects of the shape and distribution of clouds on the amount of information available for satellite images, the computing formula of cloud fragment is proposed; and using a large number of test data, we studied their interrelation, as well as their influences on the availability of satellite images, finally we established availability assessment model of satellite remote sensing images. With the comparison of the artificial classification, the validity of the model has been proved.