Simulate Characteristics Of The Light Scattering From The Spatial Target Based On STK

The laser and scattering characteristics of visible band from a target is investigated, and that of objects moving in space is simulated with the STK software system. Based on the theory of electromagnetic scattering from the rough surface, from the view of the bidirectional reflection distribution function(BRDF), with the measurement and analysis of the reflection index of the coating material of satellite and the material of the solar energy plate, the scattering intensity of visible band from a spatial space target is calculated, based on which the influence of the incidence wavelength and the characteristics of the surface material on the value of BRDF of the satellite surface. With the measurement of the BRDF of visible spectra of different material on a spatial target, the angular distribution of scattering intensity of laser and visible spectrum of targets, both simple and complex, are numerical calculated, and also the influence of characteristics of the different material on the angular distribution of scattering intensity is analyzed. With STK, the software of large scene rending, the procedure of the data visualization is implemented. The formulas of the transition matrix between different coordinate systems and the transition matrix of Euler angle and quaternion numbers are deduced. The data of the orbit and attitude of the spatial target are transited for the use in Skate software, module of spatial scattering by target is embedded into STK. Based on STK the scattering intensities of the spatial moving target in visible bands are calculated at different stations. The demonstration and simulation of spatial scattering characteristics by a moving target in space based on STK is implemented roughly.