摘要
介绍了天基毫米波空间碎片观测雷达的难点和关键技术,提出了解决问题的思路。将同时多波束天线引入到高速目标探测中,分析了雷达天线和发射机的形式,采用多频信号处理方法解决多普勒模糊问题。给出了空间站载天基毫米波雷达的系统参数,分析了测距、测角、测速精度。在天球坐标系下建立了雷达平台坐标系,通过速度分解和坐标转换,结合雷达成像的方法分析了雷达和碎片间的相对速度、位置的几何关系,在此基础上对空间站载天基毫米波雷达系统空间碎片轨道预测性能进行了分析。
Key techniques of spaceborne millimeter-wave（MMW）radar and some probes for space debris observation are introduced in this paper.First,the simultaneous multi-beam antenna is introduced into high-speed object detection and the modes of the radar antenna and transmitter is analyzed.In order to reduce the Doppler ambiguity,a multi-frequency signal processing method is used.The space station MMW radar parameters are given,and ranging,angle resolving and velocity measurement accuracies are analyzed.And then the radar platform coordinate system is created in celestial coordinate system.The relative position and velocity between radar and debris as well as the corresponding accuracies are investigated by velocity decomposition and coordinates conversion combined with radar imaging method.At last space station MMW radar parameters are given and the performance of space debris orbit prediction is also analyzed.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2010年第12期2746-2753,共8页
Journal of Astronautics
基金
国家自然科学基金(60772103)
863计划(2009AA12Z103)
973计划(2009CB72400)
