章红平, 高周正, 牛小骥, 伍岳. GPS非差非组合精密单点定位算法研究[J]. 武汉大学学报 ( 信息科学版), 2013, 38(12): 1396-1399.
引用本文: 章红平, 高周正, 牛小骥, 伍岳. GPS非差非组合精密单点定位算法研究[J]. 武汉大学学报 ( 信息科学版), 2013, 38(12): 1396-1399.
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ZGANG Hongping, GAO Zhouzheng, NIU Xiaoji, WU Yue. Research on GPS Precise Point Positioning with Un-differentialand Un-combined Observations[J]. Geomatics and Information Science of Wuhan University, 2013, 38(12): 1396-1399.
Citation: ZGANG Hongping, GAO Zhouzheng, NIU Xiaoji, WU Yue. Research on GPS Precise Point Positioning with Un-differentialand Un-combined Observations[J]. Geomatics and Information Science of Wuhan University, 2013, 38(12): 1396-1399.
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GPS非差非组合精密单点定位算法研究

Research on GPS Precise Point Positioning with Un-differentialand Un-combined Observations

    摘要
  • 摘要: 首先介绍了非差非组合精密单点定位(precise point positioning,PPP)算法,分析了它与传统PPP的差异;处理了300个IGS跟踪站连续7d的数据,分析了接收机伪距硬件延迟偏差(difference code bias,DCB)和先验电离层精度对非差非组合PPP收敛速度的影响。统计结果表明,对于非差非组合PPP,利用IGS提供的全球电离层延迟模型GIM,静态定位精度N/E方向均收敛到10cm以内,估计接收机DCB的PPP平均收敛速度为13.12min,比不估计接收机DCB的PPP快5.36min,与传统的LC PPP相当。在获得高精度电离层先验数据的条件下,估计接收机DCB的非差非组合PPP平面精度收敛10cm的速度约为8.67min,比传统PPP收敛速度平均快约3.26min。

     

    Abstract: We first introduce GNSS precise point positioning(PPP)based on un-differentialuncombined raw pseudo-ranges and carrier phase observations(RAW-OBS-PPP).Then thedifference between the traditional PPP based on ionosphere-free dual-frequency combination(LC-PPP)and RAW-OBS-PPP is discussed and evaluated by analyzing mass data of 300IGSGPS sites during day of year 034～０４０,2012.The effects of receiver’s DCB and the preci-sion of priori-ionospheric delay on the convergence of RAW-OBS-PPP are focused and dis-cussed in details.For RAW-OBS-PPP,while global ionosphere mapping(GIM)provided byInternational GNSS Service(IGS)are used as priori-information for ionosphere delays,andthe receiver’s DCB is estimated,then the mean time is about 13.12min to take convergenceinto 10cm in both north and east components.If no receiver DCB estimated,it needs about18.48min.LC PPP and RAW-OBS-PPP have almost the same performance under the condi-tion that GIM is used for RAW-OBS-PPP.If ionosphere delays with higher precision areused as priori-information,RAW-OBS-PPP needs about 8.67min(mean value)in horizontalcomponents,which is much faster than traditional LC PPP.

     

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