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当我们在卫星地球观测站对观测卫星进行跟踪的时候,我们会发现天线跟踪极化角的方向相对于星体坐标系下的极化倾角来说会存在一定程度地偏移。而且这种偏差的大小是和观测点地理位置紧密联系的。所以跟踪极化角的确定是实现星地链路跟踪极化匹配的关键节点。因此,我们可以对卫星天线极化向量的坐标进行分解,在分解工作完成以后采用坐标转换法,从而建立地球观测站天线坐标系中天线极化倾角相对于卫星坐标系中极化角的定向关系。我们可以利用他们的转换关系,通过编程计算,就能对任意线极化信号的相对任意观测位置的跟踪极化倾角进行定量分析工作。
When we track the observing satellite at the satellite Earth observation station, we find that there is a certain degree of shift in the direction of the antenna tracking polarization angle relative to the polarization tilt in the celestial coordinate system. And the size of this deviation is closely linked with the geographic location of the observation point. Therefore, the determination of tracking polarization angle is to realize the star node link tracking polarization matching the key node. Therefore, we can decompose the coordinates of the satellite antenna polarization vector and use the coordinate transformation method after the decomposition is completed, so as to establish the directional relationship between the polarization angle of the antenna in the antenna coordinate system of the Earth observation station and the polarization angle in the satellite coordinate system . We can use their transformation relationships to programmatically calculate the polarization of the traces at any arbitrary observed position for any linearly polarized signal.