Geocentric Distances Errors Modification of Space Cameras Based on WGS84 Model
In order to modify the geocentric distances error of TDI (Time Delay and Integration) CCD space camera in calculation of image motion compensation,and eliminate the influence to the relative error of image motion velocity,a model of image motion calculation of nadir has been deduced,and the influence of the geocentric distance error to the relative error of image motion velocity has been analyzed with the model;VVGS-84 (World Geodetic System) is adopted to modify the error of the geocentric distance generated by ellipticity of the earth.After modifying,the calculation and analysis of the model show that:the maximum error of image motion velocity about 2.85％ has been eliminated with modification of the geocentric distance error by WGS84 model;The match error of the forward direction (the integral direction of TDI CCD) has been greatly decreased by modifying the geocentric distance error,that prodigiously improves the imaging quality of TDI CCD space camera.
modification of error image motion model digital elevation map WGS-84
Weixiong Li Shuyan Xu Shuang Dai Deijie Yan Guangxin Li
Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun,13003 Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun,13003
国际会议
太原
英文
458-462
2011-02-26（万方平台首次上网日期，不代表论文的发表时间）