Investigation On Infrared Characteristics Of Space Target And Space Point Target Feature Extraction Based On The Spectrum

The detecting and identifying the space target using infrared characteristics of thespace target is a very effective method. The investigation of infrared characteristics is veryvital to the method. In this paper, the radiative boundary conditions were solved byMonte-Carlo. The temperature model, by which the temperature of satellite was computed,was developed, by considering the influences of self-irradiation of satellite's surface, heatflux of space orbit and the heat load. The infrared radiance model and the spectral infraredradiance model were developed by taking into account of self-irradiation of satellite'ssurface, heat flux of space orbit. Also the distribution of infrared radiance and the figure ofspectral infrared radiance received by the detector were obtained.It has great significance to distinguish the types of space targets by extracting thefeatures and recognizing the space point target. This thesis develops linear mixture spectralmodel without taking into account of influences of atmosphere according to mixturespectral model for spectral radiant intensity. The method for retrieving features of target,that its structure is unknown, is presented. The received spectral irradiance, from satellitein different positions of space orbit, is computed and analyzed. Also the effective area andtemperature of target in different space positions are extracted and analyzed. The featuresof target extracted by the method presented in this paper tallies with the measured data.