分布式InSAR卫星的天线相位中心研究

Research on Antenna Phase Center of Distributed InSAR Satellite

从天线相位中心的定义出发,针对分布式干涉合成孔径雷达(InSAR)卫星基线获取过程中涉及到的“小型宽波束”全球导航卫星系统(GNSS)天线和“大型窄波束”SAR天线,首先,研究了两型天线的相位中心特性,之后,开展了天线相位中心对基线的影响分析,明确了分布式InSAR卫星相位中心的研究重点在于双星间天线相位中心准确度和稳定度的一致性控制;结合工程研制,最后,给出了两型天线相位中心不同的控制措施。文章的研究工作对分布式InSAR卫星系统的研制具有借鉴意义。

Based on the definition of antenna phase center,aiming at the“small-wide beam”GNSS antenna and the“large-narrow beam”SAR antenna involved in the process of acquiring the baseline of distributed InSAR satellites,the phase center characteristics of the two antennas are studied at first,and then the influence of the phase center on the baseline is analyzed.It is clear that the research focus of the phase centers of distributed InSAR satellites is the consistency control of the accuracy and stability of the phase center of the dual-satellite antennas.Combined with the engineering development,the different control measures of the phase center of the two types of antennas are given in this paper.The research of this paper has reference significance for the development of distributed InSAR satellites system.