High-performance navigational satellite space signal quality assessment method

The invention provides a high-performance navigational satellite space signal quality assessment method. A downlink signal of a navigational satellite is received by an antenna with a high gain at first, the downlink signal of the navigational satellite is amplified by low noises, and the amplified downlink signal is divided evenly into three lines for monitoring and evaluating of individual signals of the signal, and comprehensive analysis and evaluation of the signal are performed finally. The high-performance navigational satellite space signal quality assessment method is capable of evaluating the receiving quality of a downlink signal of the satellite in a high-accuracy, comprehensive and multilevel mode, and being widely applied to analysis and processing of data of other navigational systems.