Geocentric Distances Errors correction of Space Cameras Based on USGS DEM
In order to correct the geocentric distances error of TDl (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 introduced, and the influence of the geocentric distance error to the relative error of image motion velocity has been analyzed with the model;the data source of the earths height above sea level USGS DEM (United States Geological Survey Digital Elevation Model) has been introduced to make digital elevation map, and correct the error generated by the different heights above sea level. After correcting, the calculation and analysis of the model shows that: the maximum error of image motion velocity about 1.72％ has been decreased to 0.06％;the match error of the forward direction (the integral direction of TDI CCD) has been greatly decreased by correcting the geocentric distance error, which greatly improves the imaging quality of TDl CCD space camera.
modification of error image motion model digital elevation map USGS DEM
Dejie Yan Shuyan Xu Weixiong Li
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences,Changchun, 13 Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences,Changchun, 13
国际会议
西安
英文
531-535
2011-05-13（万方平台首次上网日期，不代表论文的发表时间）