顾及周期项误差和起点偏差修正的北斗卫星钟差预报

doi:10.11947/j.AGCS.2016.F034

测绘学报 ›› 2016, Vol. 45 ›› Issue (S2): 132-138.doi: 10.11947/j.AGCS.2016.F034

顾及周期项误差和起点偏差修正的北斗卫星钟差预报

艾青松¹, 徐天河^2,3, 孙大伟⁴, 任磊¹

1. 长安大学, 陕西西安 710054;
2. 山东大学, 山东威海 264209;
3. 地理信息工程国家重点实验室, 陕西西安 710054;
4. 青岛农业大学, 山东青岛 266109

收稿日期:2016-11-25 修回日期:2016-12-20 出版日期:2017-05-20 发布日期:2017-05-20
通讯作者: 徐天河 E-mail:thxugfz@163.com
作者简介:艾青松(1991-),男,硕士生,研究方向为GNSS星载原子钟性能评估与钟差估计。E-mail:cadx_aqs@163.com
基金资助:
国家自然科学基金（41574013）；国家重点研发计划（2016YFB0501701）

The Prediction of BeiDou Satellite Clock Bias Based on Periodic Term and Starting Point Deviation Correction

AI Qingsong¹, XU Tianhe^2,3, SUN Dawei⁴, REN Lei¹

1. School of Geology Engineering and Surveying, Chang'an University, Xi'an 710054, China;
2. Shandong University, Weihai 264209, China;
3. State Key Laboratory of Geo-information Engineering, Xi'an 710054, China;
4. Qingdao Agricultural university, Qingdao 266109, China

Received:2016-11-25 Revised:2016-12-20 Online:2017-05-20 Published:2017-05-20
Supported by:
The National Natural Science Foundation of China (No.41574013);The National High-tech Research and Development Program of China (No.2016YFB0501701)

摘要/Abstract

摘要：

根据北斗卫星导航系统星载原子钟自身的物理特性，采用武汉大学IGS数据中心发布的2016年1月1日至2016年11月1日共306天的事后钟差产品进行谱分析。分析结果表明：北斗卫星导航系统的3类卫星钟都存在一定的周期特性；其中GEO和IGSO卫星钟的主周期相对较为明显；GEO卫星钟的主周期依次为12、24、8和6 h；IGSO的主周期为24、12、8和6 h；而MEO的3个主周期为12.9、6.4和24 h。依据各类原子钟的周期特性，同时对各天之间钟差的起始点偏差进行修正，并利用修正模型对北斗卫星钟差进行预报和精度分析。试验结果表明，改进的预报模型能显著提升北斗卫星的钟差预报精度，北斗卫星钟差24 h、12 h、6 h的平均预报精度分别能达到6.55 ns、3.17 ns和1.76 ns。

关键词: 卫星钟差, 谱分析, 主周期, 钟差预报

Abstract:

According to the physical characteristics of the BDS on-board atomic clocks, a spectral analysis method is used to detect the periodicity based on the products published by the IGS data Center of Wuhan University from January 1, 2016 to November 1, 2016. The results show that there are periodic fluctuations in the three types of satellite clocks. The main period of GEO and IGSO satellite clock bias is relatively obvious. The testing with nearly a year data showed that the main periods of GEO are 12, 24, 8 and 6 h, but for IGSO are 24, 12, 8 and 6 h, while those for MEO are 12.9, 6.4 and 24 h. Based on the periodic characteristics of different types of clocks and the correction of the starting point deviation of the clock bias, a modified prediction method of satellite clock bias is used to forecast the BeiDou satellite clock bias. The results show that the modified method can significantly improve the prediction accuracy, the 24 h, 12 h, 6 h average forecast accuracy can reach 6.55 ns, 3.17 ns and 1.76 ns respectively.

Key words: satellite clock bias, spectral analysis, periodic term, clock bias prediction

中图分类号:

P227

艾青松, 徐天河, 孙大伟, 任磊. 顾及周期项误差和起点偏差修正的北斗卫星钟差预报[J]. 测绘学报, 2016, 45(S2): 132-138.

AI Qingsong, XU Tianhe, SUN Dawei, REN Lei. The Prediction of BeiDou Satellite Clock Bias Based on Periodic Term and Starting Point Deviation Correction[J]. Acta Geodaetica et Cartographica Sinica, 2016, 45(S2): 132-138.

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顾及周期项误差和起点偏差修正的北斗卫星钟差预报

The Prediction of BeiDou Satellite Clock Bias Based on Periodic Term and Starting Point Deviation Correction

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