卫星远场测试工艺装备设计

Processing Equipment Design for Satellite Far Field Wireless Tests

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 satellites based on broadcast message is affected by a number of factors. Multiple-path effect is one of the major contributor to the error of pseudo range. Experiments and tests are needed to determine that how error of pseudo range is connected to the shape of a satellite,and to verify how to lessen multiple path effect by re-arranging the outer structure of a satellite,such as solar arrays or antennas. A series of equipments and infrastructure are built according to the technical conditions of the experiments. By means of the critical function of the equipment,the satellite far-field wireless tests are completed,the level of pseudo range error is finally determined in typical conditions. It is significant for satellite navigation error analysis and for enhancing the positioning accuracy.