| 北斗小数周偏差时变特性分析及应用 |
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| 引用本文： | 焦博,郝金明,时春霖,刘伟平,刘婧,谢建涛.北斗小数周偏差时变特性分析及应用[J].测绘通报,2021,0(1):66-70. |
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| 作者姓名： | 焦博 郝金明 时春霖 刘伟平 刘婧 谢建涛 |
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| 作者单位： | 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 |
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| 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%。
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| 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 |
| 收稿时间： | 2020-02-20 |
Analysis and application of time-varying property of BDS fractional cycle bias |
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| JIAO Bo,HAO Jinming,SHI Chunlin,LIU Weiping,LIU Jing,XIE Jiantao.Analysis and application of time-varying property of BDS fractional cycle bias[J].Bulletin of Surveying and Mapping,2021,0(1):66-70. |
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| Authors: | JIAO Bo HAO Jinming SHI Chunlin LIU Weiping LIU Jing XIE Jiantao |
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| Institution: | 1. Institute of Geospatial Information, Information Engineering University, Zhengzhou 450001, China;2. Troops 61206, Beijing 100042, China |
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| 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 to2017;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 floatsolution PPP. |
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| Keywords: | BDS fractional cycle bias time-varying property precise point positioning ambiguity resolution |
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