卫星导航终端设备在真实卫星信号下的动态定位精度测试方法研究

卫星导航终端产品测试可分为室内模拟测试和实际信号测试，室内模拟测试信号与实际使用环境有较大差别，不能完全反映实际使用效果；而实际信号测试成本高，重复性较差。为了解决上述测试方法中的不足，本文提出了一种既可实现实际信号的采集，又可在相同环境下反复回放，进而能够高效完成导航终端产品实际使用性能测试方法。本方法基于全球导航卫星系统信号采集回放设备，搭建了包括测试车、实时动态差分基准站、实时动态差分流动站接收机、惯导单元、导航天线等设备的动态跑车测试系统，采集实际信号并在微波暗室中回放，以测试接收机的各项性能指标，为产品定型和性能比较提供参考依据。

Research on Dynamic Positioning Accuracy Test Method of Satellite #br# Navigation Terminal Equipment under Real Satellite Signal

Test technology of global satellite navigation terminals is divided into indoor simulation test and actual signal test.Signal of the indoor simulation test is quite different from environment where devices are deployed,and cannot fully reflect practical performance.Cost of actual signal test is high and the test cannot be repeated.A novel test method of satellite navigation terminal,which can complete the practical performance test of the navigation terminal products effectively by collecting the actual signal and replaying it in the same environment,is delivered in this work.Based on the GNSS signal record and playback equipment,a dynamic running vehicle testing system is set up,consisting of a test car,a RTK base station,a RTK mobile station receiver,an inertial navigation unit,and a navigation antenna.The proposed system collects actual signal and replays it in the microwave dark room,to test positioning rate accuracy and location data availability index of receivers.The reference for product stereotype and performance comparison is then provided.