Analysis of position coordinate accuracy of triple GNSS system by post-processing dual frequency observations using open source GAMP: A case study

IF 0.9 4区地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS

Acta Geodynamica et Geomaterialia Pub Date : 2020-12-12 DOI:10.13168/agg.2020.0035

Jabir Shabbir Malik

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Abstract

Multi GNSS system increases the GNSS positioning accuracy, efficiently improve the satellite geometry strength and further enhances precise point positioning (PPP) performance. In this study, positioning coordinate accuracy of GPS, GLONASS, Galileo and BeiDou dual frequency observations is estimated and comparatively analysed. Ten days of dataset from nine International GNSS service sites are adopted for eight different GNSS PPP scenarios. Position in east, north and up components and convergence speed test for single system GPS, GLONASS, BeiDou and Galileo, dual system GPS/GLONASS and Galileo/BeiDou, combined triple system GPS/GLONASS/BeiDou and GPS/GLONASS/Galileo is investigated. Results demonstrate that PPP solutions of GPS show an improvement in east, north and up components over GLONASS, BeiDou and Galileo PPP solutions. GPS PPP solutions reach to 2.88, 2.32 and 6.10 cm in east north and up components, respectively. Difference of standard deviation (STD) values between GPS and GLONASS PPP results is 4, 3 and 2 cm, in east, north and up direction, respectively. Moreover, difference of STD between GPS and Galileo PPP is >1cm in all three components. Furthermore, BeiDou only PPP results reach to 15, 10 and 20 cm in east, north and up direction in Asia Pacific, respectively. Horizontal component for combine Galileo/BeiDou PPP and GPS/GLONASS PPP solutions reach to 3.24 and 3.02 cm, respectively. Calculation results of 3D positioning show that combined GPS/GLONASS/BeiDou PPP solutions improve by 5.59 % and 17.72 % over GPS/GLONASS and Galileo/BeiDou PPP solutions, respectively. Furthermore, STD for 3D positioning of triple system GPS/GLONASS/Galileo shows an improvement of 47.53 %, 31.56 % and 24.90 % over Galileo/BeiDou, GPS/GLONASS and GPS/GLONASS/BeiDou PPP results, respectively. Two different convergence time tests are undertaken. Results of GPS-only PPP solutions show fastest convergence speed to achieve accuracy level of 1.0 cm over GLONASS-only, BeiDou-only, Galileo-only, and Galileo/BeiDou PPP solutions. Combine dual system GPS/GLONASS PPP convergence time show an improvement of 56.46 % over GPS-only solutions. The contribution of BeiDou to reducing the convergence time of the combine GPS/GLONASS PPP improve by 27.53 % over combine GPS/GLONASS PPP convergence time. Moreover, GPS/GLONASS/Galileo PPP convergence speed show an improvement of 20.06 % over convergent sessions of GPS/GLONASS/BeiDou PPP. Furthermore, to achieve accuracy level of 5.0 cm, combine three system GPS/GLONASS/BeiDou PPP reduces the convergence time than the GPS/GLONASS/Galileo convergent sessions length. ARTICLE INFO

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基于开源GAMP的双频观测后处理分析三重GNSS系统的位置坐标精度：一个案例研究

多GNSS系统提高了GNSS定位精度，有效提高了卫星几何强度，进一步提高了精确点定位（PPP）性能。本文对GPS、GLONASS、伽利略和北斗双频观测的定位坐标精度进行了估计和比较分析。针对八种不同的全球导航卫星系统购买力平价情景，采用了来自九个全球导航卫星卫星系统国际服务站点的十天数据集。研究了单系统GPS、GLONASS、北斗和伽利略、双系统GPS/GLONASS和伽利略/北斗、组合三系统GPS/GRONASS/北斗和GPS/GLONAS/伽利略的东、北、上分量位置和收敛速度测试。结果表明，与GLONASS、北斗和伽利略PPP解决方案相比，GPS的PPP解决方案在东、北和上分量方面都有所改进。GPS PPP解决方案在东北和向上部分分别达到2.88、2.32和6.10厘米。GPS和GLONASS PPP结果之间的标准差（STD）值在东、北和向上方向分别为4、3和2cm。此外，GPS和Galileo PPP之间的STD在所有三个分量上的差异均大于1cm。此外，仅北斗的PPP结果在亚太地区的东、北和向上方向分别达到15、10和20厘米。伽利略/北斗PPP和GPS/GLONASS PPP组合解决方案的水平分量分别达到3.24和3.02厘米。三维定位计算结果表明，GPS/GLONASS/北斗PPP组合方案分别比GPS/GLONAS和Galileo/北斗PPP方案提高了5.59%和17.72%。此外，三重系统GPS/GLONASS/Gileo的三维定位STD分别比Galileo/北斗、GPS/GLONAS和GPS/GLONAS/北斗的PPP结果提高了47.53%、31.56%和24.90%。进行了两种不同的收敛时间测试。仅GPS PPP解决方案的结果显示，与仅GLONASS、仅北斗、仅伽利略和伽利略/北斗PPP解决方案相比，收敛速度最快，达到1.0厘米的精度水平。联合双系统GPS/GLONASS PPP收敛时间比仅GPS解决方案提高了56.46%。北斗对减少GPS/GLONASS组合PPP收敛时间的贡献比GPS/GLONAS-PPP组合收敛时间提高了27.53%。此外，GPS/GLONASS/Gileo PPP的收敛速度比GPS/GLONAS/北斗PPP的收敛会话提高了20.06%。此外，为了达到5.0cm的精度水平，组合三系统GPS/GLONASS/北斗PPP比GPS/GLONAS/Gileo的收敛会话长度缩短了收敛时间。文章信息

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来源期刊

Acta Geodynamica et Geomaterialia 地学-地球化学与地球物理

CiteScore

2.30

自引率

0.00%

发文量

期刊介绍： Acta geodynamica et geomaterialia (AGG) has been published by the Institute of Rock Structures and Mechanics, Czech Academy of Sciences since 2004, formerly known as Acta Montana published from the beginning of sixties till 2003. Approximately 40 articles per year in four issues are published, covering observations related to central Europe and new theoretical developments and interpretations in these disciplines. It is possible to publish occasionally research articles from other regions of the world, only if they present substantial advance in methodological or theoretical development with worldwide impact. The Board of Editors is international in representation.