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本文讨论卫星信标发射的线极化波和圆极化波由地球表面反射进入多卜勒测速仪所引起的测速误差,求得了光滑平面镜反射、粗糙面镜反射和粗糙面漫散射三类共九种情况的多径测速误差表达式.分析表明:降低接收天线的旁瓣能有效地减小多径测速误差;采用圆极化发射和接收要比线极化的多径测速误差小.
This paper discusses the velocity errors caused by the satellite polarizations and circularly polarized waves reflected by the Earth’s surface into the Doppler velocimeter. The results of smooth plane mirror reflection, rough surface mirror reflection and rough surface diffuse scattering The results show that reducing the side lobe of the receiving antenna can effectively reduce the multipath speed error, and the error of multi-path speed measurement using circularly polarized transmitting and receiving than the linear polarization is small.