一种基于偏航导引的SAR卫星成像参数更新方法  

A yaw steering-based method for updating SAR satellite imaging parameters

作　　者：陈焕然 盛磊[1] 项海兵[1] CHEN Huanran;SHENG Lei;XIANG Haibing(No.38th Research Institute,China Electronics Technology Group Corporation,Hefei 230088,China)

机构地区：[1]中国电子科技集团公司第三十八研究所,合肥230088

出　　处：《空天预警研究学报》2024年第4期253-257,共5页JOURNAL OF AIR & SPACE EARLY WARNING RESEARCH

基　　金：国家自然科学基金项目(U20B2068)。

摘　　要：为了解决低轨合成孔径雷达(SAR)卫星在开启偏航导引情况下缺乏参数计算方法的问题,从现有某卫星的实际任务规划需求出发,分析了升降轨、左右侧视等情况下偏航导引对目标可视情况的影响,提出了一种面向低轨道SAR卫星偏航导引更新成像参数的计算方法,达到对指定目标位置准确成像的效果.仿真结果表明,地球自转引起的偏航对成像中心时刻和斜距影响较大.In order to solve the problem of lack of parameter calculation methods for low-orbit synthetic aper-ture radar(SAR)satellites with yaw guidance enabled,this paper starts from the actual mission planning requirements of a certain existing satellite to analyze the influence of yaw guidance on target visibility under the conditions of ascending orbit,descending orbit,left-right and side view,and then proposes a method for calculating the updated imaging parameters of yaw guidance for low-orbit SAR satellites to achieve the effect of accurately imaging the specified target position.Simulation results show that the yaw caused by the earth rotation has a great influence on the imaging center time and oblique distance.

关 键 词：合成孔径雷达卫星 低轨道成像 偏航导引 精确定位 

分 类 号：TN958[电子电信—信号与信息处理]