基于衛(wèi)星雙向時(shí)間比對(duì)的無(wú)中心站間時(shí)間同步
電子技術(shù)應(yīng)用
仇三山1，于雯2，孫長(zhǎng)軍2，王宏博3
1.中國(guó)電子科技集團(tuán)公司第十研究所；2.北京跟蹤與通信技術(shù)研究所；3.北京無(wú)線電計(jì)量測(cè)試研究所
摘要： 針對(duì)多站分布式協(xié)同站間高精度時(shí)間同步關(guān)鍵問(wèn)題，在詳細(xì)介紹衛(wèi)星雙向時(shí)間比對(duì)的基本原理和精度分析基礎(chǔ)上，設(shè)計(jì)了一種無(wú)中心多站衛(wèi)星雙向比對(duì)邏輯架構(gòu)和多站時(shí)間同步處理算法，充分考慮硬件資源約束，并提供時(shí)差測(cè)量數(shù)據(jù)冗余，避免了因某個(gè)站故障造成的全系統(tǒng)時(shí)間同步功能失效，提高系統(tǒng)時(shí)間同步的魯棒性和靈活性。基于精密單點(diǎn)定位技術(shù)進(jìn)行了異地遠(yuǎn)程衛(wèi)星雙向時(shí)間同步精度驗(yàn)證，試驗(yàn)結(jié)果表明時(shí)間同步精度優(yōu)于6 ns。
中圖分類號(hào)：TN249 文獻(xiàn)標(biāo)志碼：A DOI: 10.16157/j.issn.0258-7998.234744
中文引用格式： 仇三山，于雯，孫長(zhǎng)軍，等. 基于衛(wèi)星雙向時(shí)間比對(duì)的無(wú)中心站間時(shí)間同步[J]. 電子技術(shù)應(yīng)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.
中文引用格式： 仇三山，于雯，孫長(zhǎng)軍，等. 基于衛(wèi)星雙向時(shí)間比對(duì)的無(wú)中心站間時(shí)間同步[J]. 電子技術(shù)應(yīng)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
Qiu Sanshan1，Yu Wen2，Sun Changjun2，Wang Hongbo3
1.The 10th Research Institute of China Electronics Technology Group Corporation；2.Beijing Institute of Tracking and Telecommunications Technology；3.Beijing Institute of Radio Metrology and Measurement
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
引言
站間時(shí)間同步是多站分布式協(xié)同工作的前提，如多站協(xié)同導(dǎo)航、多站時(shí)差定位等均需要實(shí)現(xiàn)各個(gè)站之間的高精度時(shí)間同步，以滿足系統(tǒng)應(yīng)用精度要求。實(shí)現(xiàn)多站遠(yuǎn)程時(shí)間比對(duì)的典型方法有光纖雙向時(shí)間比對(duì)法、衛(wèi)星雙向時(shí)間比對(duì)法、導(dǎo)航衛(wèi)星快速共視法。
本文主要針對(duì)基于衛(wèi)星雙向時(shí)間比對(duì)的多站間高精度時(shí)間同步進(jìn)行設(shè)計(jì)與精度驗(yàn)證進(jìn)行論述。
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作者信息：
仇三山1，于雯2，孫長(zhǎng)軍2，王宏博3
（1.中國(guó)電子科技集團(tuán)公司第十研究所，四川 成都 610036；
2.北京跟蹤與通信技術(shù)研究所，北京 100094；
3.北京無(wú)線電計(jì)量測(cè)試研究所，北京 100854）
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