测绘学报 ›› 2016, Vol. 45 ›› Issue (2): 140-146.doi: 10.11947/j.AGCS.2016.20150226

• 大地测量学与导航 • 上一篇    下一篇

估计北斗卫星钟差频间偏差的一种方法

李浩军1 2 3, 李博峰1, 王解先1, 徐天河2 3   

  1. 1. 同济大学测绘与地理信息学院, 上海 200092;
    2. 地理信息工程国家重点实验室, 陕西 西安 710054;
    3. 西安测绘研究所, 陕西 西安 710054
  • 收稿日期:2015-04-29 修回日期:2015-08-14 出版日期:2016-02-20 发布日期:2016-02-29
  • 通讯作者: 徐天河,E-mail: xtianhe@263.net E-mail:xtianhe@263.net
  • 作者简介:李浩军(1981-),男,副研究员,研究方向为精密单点定位、GNSS卫星钟差、GNSS系统偏差。
  • 基金资助:
    国家自然科学基金(41204034;41174023;41374031);上海市科委项目(14511105000)

A Method for Estimating BeiDou Inter-frequency Satellite Clock Bias

LI Haojun1 2 3, LI Bofeng1, WANG Jiexian1, XU Tianhe2 3   

  1. 1. College of Surveying and Geo-Informatics, Tongji University, Shanghai 200092, China;
    2. State Key Laboratory of Geo-information Engineering, Xi'an 710054, China;
    3. Xi'an Research Institute of Surveying and Mapping, Xi'an 710054, China
  • Received:2015-04-29 Revised:2015-08-14 Online:2016-02-20 Published:2016-02-29
  • Supported by:
    The National Natural Science Foundation of China (Nos. 41204034;41174023;41374031);The Science and Technology Commission of Shanghai Municipality Project (No. 14511105000)

摘要: 针对北斗频间卫星钟差偏差现有估计方法的不足,提出一种估计方法。该方法不仅顾及频间卫星钟差偏差的变化部分也顾及了其常数部分。采用10个观测站数据,验证了本文提出的算法,分析了北斗频间卫星钟差偏差的特性。在短期内,北斗频间卫星钟差偏差常数部分具有稳定性。对采用新算法计算得到的北斗频间卫星钟差偏差进行了模型化,结果表明,每颗卫星对应的频间钟差偏差可以利用10个参数予以高精度表示,对应精度可以达到厘米级。当采用第1天的模型参数进行第2天频间卫星钟差偏差值计算时,可实现厘米级结果。基于北斗频间卫星钟差偏差的稳定性与可模型化性,提出了高精度北斗卫星钟差服务策略,为我国高精度北斗卫星钟差服务提供参考。

关键词: 三频信号, 精密单点定位, 频间钟差偏差, 北斗卫星导航系统

Abstract: A new method for estimating the BeiDou inter-frequency satellite clock bias is proposed, considering the shortage of the current methods. The constant and variable parts of the inter-frequency satellite clock bias are considered in the new method. The data from 10 observation stations are processed to validate the new method. The characterizations of the BeiDou inter-frequency satellite clock bias are also analyzed using the computed results. The results of the BeiDou inter-frequency satellite clock bias indicate that it is stable in the short term. The estimated BeiDou inter-frequency satellite clock bias results are molded. The model results show that the 10 parameters of model for each satellite can express the BeiDou inter-frequency satellite clock bias well and the accuracy reaches cm level. When the model parameters of the first day are used to compute the BeiDou inter-frequency satellite clock bias of the second day, the accuracy also reaches cm level. Based on the stability and modeling, a strategy for the BeiDou satellite clock service is presented to provide the reference of our BeiDou.

Key words: triple-frequency signals, precise point positioning, inter-frequency clock bias, BeiDou Navigation Satellite System

中图分类号: