导航卫星上行注入与测距性能测试系统设计

Design of Test System for Uplink Injecting and Ranging Performance of Navigation Satellite

导航卫星的上行注入与测距性能是卫星导航系统服务精度一个重要保证,设计了一种导航卫星的上行注入与测距性能测试系统;该系统以控制处理计算机为核心,并结合了专用设计的基准频率发生器模块、基准时间发生器模块、注入信号发生器模块和通用商业化仪器,能实时动态地模拟导航卫星在轨期间接收地面注入信号的情形,完成导航卫星上行注入性能测试中电文信息的生成和比对以及上行测距性能测试;该测试系统稳定、灵活,测量精度高,而且可以通过修改测试软件参数来满足新的测试要求,便于测试系统的升级改造。

The uplink injecting and ranging performance of navigation satellite is an important guarantee of the service accuracy for satellite navigation system. A navigation satellite uplink injection and ranging performance test system is proposed in this paper. The core of the test system is the controlling and processing computer. The test system is combined with the special design of the reference frequency generator module, the reference time generator module, the injection signal generator module and general commercial instruments. The test system can real--time dynamically simulate scenarios that the orbital navigation satellite receive uplink signals from earth station. The performance of ranging and information generating and comparing can be completed. The test system is stable, flexible with high accuracy. Test software parameters can be modified to meet the new testing requirements, and so the test system is easy for upgrading.