星地双向时间同步技术在COMPASS中的应用
Application of Two-Way Satellite-Ground Time Synchronization in COMPASS
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摘要: 讨论了星地双向时间同步的基本原理,推导了其数学模型和误差模型,分析了星地双向时间同步精度的误差因素,理论论证了时间同步精度可达0.9ns。进一步研制了星地双向时间同步软件,并应用于COM-PASS在轨试验阶段时间同步数据的处理。结果表明,COMPASS试验阶段,星地时间同步精度达到1.0ns。Abstract: In this paper,the basic theory and mathematical model of two-way satellite-ground time transfer are presented.The error model is deduced and error budgets are analyzed and concluded that the accuracy approaches 0.9 ns.Furthermore,software was developed and actual two-way satellite-ground observations from COMPASS validation testing were processed.The results indicate that the accuracy of satellite-ground time transfer in COMPASS validation phase is 1.0 ns.
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