测绘通报 ›› 2021, Vol. 0 ›› Issue (1): 66-70.doi: 10.13474/j.cnki.11-2246.2021.0012

• 学术研究 • 上一篇    下一篇

北斗小数周偏差时变特性分析及应用

焦博1, 郝金明1, 时春霖2, 刘伟平1, 刘婧1, 谢建涛1   

  1. 1. 信息工程大学地理空间信息学院, 河南 郑州 450001;
    2. 61206部队, 北京 100042
  • 收稿日期:2020-02-20 发布日期:2021-02-08
  • 作者简介:焦博(1992-),男,硕士,助教,主要研究方向为GNSS数据处理。E-mail:jiaobojob@qq.com
  • 基金资助:
    国家自然科学基金(41804035)

Analysis and application of time-varying property of BDS fractional cycle bias

JIAO Bo1, HAO Jinming1, SHI Chunlin2, LIU Weiping1, LIU Jing1, XIE Jiantao1   

  1. 1. Institute of Geospatial Information, Information Engineering University, Zhengzhou 450001, China;
    2. Troops 61206, Beijing 100042, China
  • Received:2020-02-20 Published:2021-02-08

摘要: 小数周偏差可用于精密单点定位的模糊度固定,其时变特性对于FCB的播发间隔、数据总量有着重要影响。当前北斗应用进入成熟期,对北斗FCB时变特性及其变化进行研究,有利于推广北斗PPP模糊度固定应用。本文基于单差FCB的生成方法,对2017年和2019年的北斗FCB时变特性展开研究,并改进了IGSO卫星窄巷FCB的播发间隔,通过已知测站固定解PPP解算,验证了改进后的北斗FCB产品。试验表明:2019年北斗FCB的稳定性相比2017年大幅提高;IGSO卫星可每天播发一组窄巷FCB,相比原有播发间隔减小73.4%的数据总量;改进后FCB可有效应用于北斗固定解PPP,收敛速度相比浮点解提升43.1%。

关键词: 北斗, 小数周偏差, 时变特性, 精密单点定位, 模糊度固定

Abstract: Fractional cyclebias can be used in ambiguity resolution of precise point positioning. Its time-varying property has an important impact on the broadcast interval and the data amount of FCB. Since the application of BDS has entered a mature stage, studying the time-varying property and its changes of BDS FCB is conducive to promoting the application of BDS PPP ambiguity resolution.Based on the generation method of single-difference FCB, this paper analyzes the time-varying property of the BDS FCB in 2017 and 2019, and improves the broadcasting interval of the narrow-lane FCB of IGSO satellites. The improved FCB is verified by the fixed-solution PPP of known reference stations.Experiments show that the stability of BDS FCB in 2019 is greatly improved compared to 2017; IGSO satellites can broadcast one group of narrow-lane FCB for one day, which reduce the data amount by 73.4%; the improved FCB can also be effectively applied to the fixed-solution BDS PPP, the convergence speed of which is 43.1% faster than the float-solution PPP.

Key words: BDS, fractional cycle bias, time-varying property, precise point positioning, ambiguity resolution

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