卫星天线极化向量的跟踪定向分析

Analysis of the Polarization Vector Obliquity Direction for Satellite Tracking

卫星地球观测站跟踪观测卫星时,天线跟踪极化角方向相对星体坐标系下的极化倾角存在偏移,其偏差大小与观测点地理位置有关。为了更好地实现星地链路跟踪极化匹配,必须确定跟踪极化角。通过对卫星天线极化向量的坐标分解,采用坐标转换法,建立地球观测站天线坐标系中的天线极化倾角对卫星坐标系中极化角的定向关系。基于上述转换关系,通过编程计算,可以对任意线极化信号相对任意观测位置的跟踪极化倾角进行定量分析。

While ground station is tracking satellite, antenna polarization vector that was defined at the coordinate of the satellite had shifted, and orientation of polarization vector was different as station geography diverse. The poiarization vector offset is correlative with the station geography position and the satellite spotting. In order to realize the polarization vector matched for tracking satellite, we should ensure polarization vector obliquity direction. The vectors of antenna polarization adopting a coordinate transformation methods is analyzed in order to seek out a relative connection about the polarization vector obliquity between the satellite coordinate and the ground station coordinate, and to obtain the data graph of the polarization vector obliquity, which would serve to the ground station tracking satellite.