摘要： 针对多站分布式协同站间高精度时间同步关键问题，在详细介绍卫星双向时间比对的基本原理和精度分析基础上，设计了一种无中心多站卫星双向比对逻辑架构和多站时间同步处理算法，充分考虑硬件资源约束，并提供时差测量数据冗余，避免了因某个站故障造成的全系统时间同步功能失效，提高系统时间同步的鲁棒性和灵活性。基于精密单点定位技术进行了异地远程卫星双向时间同步精度验证，试验结果表明时间同步精度优于6 ns。

中图分类号：TN249 文献标志码：A DOI: 10.16157/j.issn.0258-7998.234744
中文引用格式： 仇三山，于雯，孙长军，等. 基于卫星双向时间比对的无中心站间时间同步[J]. 电子技术应用，2024，50(6)：107-110.
英文引用格式： Qiu Sanshan，Yu Wen，Sun Changjun，et al. The no-center time synchronization based on two-way satellite time transfer[J]. Application of Electronic Technique，2024，50(6)：107-110.

The no-center time synchronization based on two-way satellite time transfer

Abstract： Aiming at the key problem of high precision time synchronization between multi-station distributed cooperative stations，the basic principle and accuracy analysis of the two-way satellite time transfer are introduced in detail. A kind of no-center satellite two-way time transfer architecture and time synchronization algorithm are designed. Considering hardware resource constraints and providing redundant time difference measurement data, it avoids the failure of the entire system time synchronization function caused by a station failure，the robustness and flexibility of time synchronization are improved. Based on the PPP（Precise Point Positioning），the time synchronization accuracy of long-range Two-way satellite time transfer if verified，better than 6 ns.

Key words : satellite two-way time transfer；no-center；time synchronization；system time；PPP