全球定位系统2026，Vol.51Issue(4)：55-65,80,12.DOI:10.12265/j.gnss.2026192
罗兰C授时信号水下衰减与误差规律研究
Research on underwater attenuation and timing error characteristics of Loran-C timing signal
齐信 1吴苗 2李靖宇 3李振中 4杨大峰 5吴忠敏6
作者信息
- 1. 中国人民解放军 92678 部队,天津 300220||海军工程大学,武汉 430033
- 2. 海军工程大学,武汉 430033
- 3. 中国人民解放军 91821 部队,潮州 521000
- 4. 中国人民解放军 92678 部队,天津 300220
- 5. 西安空天电子技术有限公司,西安 710024
- 6. 中国人民解放军 91370 部队,福州 350014
- 折叠
摘要
Abstract
This paper focuses on the intensity attenuation and timing error variation of Loran-C Navigation System(Loran-C)signals during underwater propagation.Firstly,based on the electromagnetic properties of seawater,an underwater propagation attenuation model is established,and the attenuation constant and attenuation per meter are derived,and the variation pattern of signal field strength with water depth is analyzed.Secondly,starting from the seawater dispersion effect,a theoretical formula of envelope-to-cycle difference(ECD)increasing with water depth is derived,the concept of additional secondary phase factor(ASF)is introduced,and a comprehensive timing error model is established.Finally,an underwater timing reception experiment scheme is designed,and field tests are carried out in Weihai and Shangchuan Island waters.The measured results show that the signal field strength attenuation in Weihai waters is about 9.98 dB/m,and the timing error increases linearly with water depth at a slope of about 1.86 µs/m,while the timing error slope in Shangchuan Island waters is 1.49 µs/m.By establishing an underwater ASF database,the timing error within 4 m water depth is expected to be reduced from 7-8 µs to better than 1 µs.This paper provides theoretical basis and measured data support for the evaluation and deployment of underwater timing capability of the Loran-C system.关键词
罗兰 C 系统(Loran-C)/水下授时/包周差(ECD)/附加二次相位因子(ASF)/色散效应/授时误差/综合 PNT 体系Key words
Loran-C Navigation System(Loran-C)/underwater timing/envelope-to-cycle difference(ECD)/additional secondary phase factor(ASF)/dispersion effect/timing error/integrated PNT system分类
信息技术与安全科学引用本文复制引用
齐信,吴苗,李靖宇,李振中,杨大峰,吴忠敏..罗兰C授时信号水下衰减与误差规律研究[J].全球定位系统,2026,51(4):55-65,80,12.
