Effective Velocity Estimation for Space-Borne SAR based on Chirp Scaling Algorithm

摘要：

Effective velocity is an important parameter for space-borne SAR imaging using chirp scaling algorithm. The precision of effective velocity estimation has strong impact on the quality of final SAR image. In this paper, two conventional effective velocity estimation methods and their intrinsic defects, such as inaccuracy and excessive dependence of satellite track parameters are firstly discussed and the reason why defects exist is also analyzed. Then a new algorithm is proposed for effective velocity estimation. The algorithm is based on iterative calculations and is independent of satellite track parameters; it can estimate effective velocity accurately by using variance of image as cost function. RADARSAT-1 image of Vancouver experimental data has been processed to demonstrate the effect of the proposed algorithm.

作者: Xiaojin Shi Yunhua Zhang Wenshuai Zhai

作者单位: Center for Space Science and Applied Research,Chinese Academy of Sciences,Beijing 100080

会议类型: 国际会议

会议名称: 首届亚太合成孔径雷达会议(1st Asian and Pacific Conference on Synthetic Aperture Radar Proceedings)

会议地点: 安徽黄山

会议语种:英文

在线出版日期: 2007-11-05（万方平台首次上网日期，不代表论文的发表时间）