天基雷达地面回波的多普勒频率特性  

Doppler Frequency Charateristics of Ground Clutter for Space-Based Radar

作　　者：王文生[1] 王小谟[2] 许建峰 

机构地区：[1]北京理工大学信息科学技术学院电子工程系,北京100081 [2]中国电子科技集团公司电子科学研究院,北京100041

出　　处：《北京理工大学学报》2006年第3期268-271,共4页Transactions of Beijing Institute of Technology

基　　金：国家"八六三"计划项目(2004AA701004)

摘　　要：研究地球自转对天基雷达地面回波的多普勒频率的影响,通过分析卫星雷达与地面回波点的相对速度,推导了天基雷达地面回波的多普勒频率计算公式.由公式可知,当卫星雷达轨道高度一定时,地球自转对地面回波多普勒频率的影响只与卫星的轨道倾角和星下点纬度有关,其偏航幅度接近于1,最大偏航角约为4°,与地面反射点的位置无关.To study the earth＇s rotation effect on the Doppler frequency of ground clutter for spacebased radar, in this paper, by analyzing the relative velocity between the satellite radar and the point of ground, a detailed derivation of the formula about Doppler frequency is presented. The effect of earth＇s rotation depends only on the satellite orbit inclination and its latitude, and not on the location of the ground refrecting point for a given height. The crab magnitude scaling the Doppler magnitude of clutter approximates to 1 and the maximum of crab angle affecting the azimuth angle approximates to 4°.

关 键 词：天基雷达 多普勒频率 地面杂波 

分 类 号：TN957[电子电信—信号与信息处理]