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导航卫星播发信号的用户等效测距误差(UERE)受到众多因素的影响,多径效应是其中较为主要的一个因素。为了测定卫星外形布局对多径效应及其带来的伪距误差的影响,同时为了验证减少多径效应的布局优化措施是否有效,有必要进行导航卫星的无线测试。在对试验技术条件进行充分研究后,设计了一系列的试验支持装配和工具,满足了多个状态的测试要求。通过工装的关键功能设计,完成了某卫星远场测试,测定了导航定位误差在典型工况下的量级,对卫星导航误差分析和提高定位精度有着重要意义。
User-equivalent ranging error (UERE) of navigation satellite broadcast signals is affected by many factors, of which the multipath effect is one of the major factors. In order to determine the effect of satellite profile on the multipath effect and its pseudo-range error, and in order to verify whether the layout optimization measures to reduce the multipath effect are effective, it is necessary to carry out the wireless test of navigation satellite. After fully studying the technical conditions of the test, a series of test support assemblies and tools were designed to meet the test requirements of multiple states. Through the key function design of the tooling, a satellite far field test was completed, and the magnitude of the navigation and positioning error was measured under typical working conditions. It is of great significance for satellite navigation error analysis and positioning accuracy improvement.