西安电子科技大学学报（自然科学版）Issue(1)：62-68,7.DOI:10.3969/j.issn.1001-2400.2015.01.010
地球同步轨道SAR曲线轨迹二维空间分辨率分析
Analysis of the two-dimensional spatial resolution for the curved traj ectory of GEO SAR
摘要
Abstract
In geosynchronous earth orbit synthetic aperture radar(GEO SAR),because of such factors as the curve track of the satellite,the influence of earth rotation and so on,there is no explicit expression for the moving track of the satellite with respect to the target,and the track velocity varies greatly on different obit positions of the satellite,so the method of calculating resolution for uniform line motion in airborne and LEO SAR is not suitable for GEO SAR.Aiming at the mentioned problems,this paper proposes a method of calculating the two-dimensional spatial resolution based on phase gradient analysis in GEO SAR.In this paper,a conj ecture is presented and proved by introducing the intermediate value theorem.There exists an equal track velocity,which can ensure the theoretical azimuth resolution within a range,and that azimuth resolution range is calculated.Finally,the Back proj ection (BP) algorithm simulation experiments validate the proposed method.关键词
地球同步轨道/相位梯度/二维空间分辨率/介值定理/后向投影算法Key words
geosynchronous earth orbit(GEO)/phase gradient/two-dimensional spatial resolution/intermediate value theorem/backproj ection (BP) algorithm分类
信息技术与安全科学引用本文复制引用
陈溅来,李震宇,杨军,孙光才,邢孟道..地球同步轨道SAR曲线轨迹二维空间分辨率分析[J].西安电子科技大学学报（自然科学版）,2015,(1):62-68,7.基金项目
国家自然科学基金资助项目(61222108,61301292) （61222108,61301292）
