%0 Journal Article
%T Analysis of Effective Slant Range Model Accuracy Based on Low-Earth-Orbital (LEO) Spaceborne SAR<br>等效斜视距离模型在星载LEO-SAR中的精度分析
%A Zhao Bing-ji Qi Xiang-yang Song Hong-jun Zhou Hui
%A <br>赵秉吉
%A 齐向阳
%A 宋红军
%A 周辉
%J 电子与信息学报
%D 2013
%I 
%X This paper aims at analyzing the applicability of the hyperbolic range model meeting resolution higher than one meter for low-earth orbital spaceborne SAR. How long the integration time can the range model be applied to, and the corresponding azimuth resolution are main issues of this paper. An accurate geometry is modeled firstly to get the Doppler centroid and the Doppler FM rate, which have the higher accuracy. Then the accurate range model can be got through the Doppler parameter reversion. The azimuth history phase errors can then be calculated by comparing with the numeric values of the slant range information. If the errors are under the threhold of ,π/4 the disfocusing is impossible. Based on the theory above, the parameters of TerraSAR-X are utilized for simulation. The longest integration time and the best resolution got from the hyperbolic range model are analyzed. The conclusion of this paper offers an approach for analyzing the range model of the current low-earth orbital spaceborne SAR.
%K Low-Earth-Orbital spaceborne SAR (LEO-SAR)
%K Doppler parameters
%K “Satellite-target” geometry
%K Hyperbolic range model<br>低轨星载SAR
%K 多普勒参数
%K “星-地”几何建模
%K 等效斜视距离模型
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=D7FACDD289E24C2D9497582F2B308654&yid=FF7AA908D58E97FA&iid=CA4FD0336C81A37A&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=0&reference_num=0