相位平滑伪距对GNSS定位精度的影响
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摘要
为了提高精密单点定位和双差网解算结果的精度,提出利用相位平滑伪距来提高GNSS定位精度的方法:给出数据预处理的方法和流程,分析处理后的观测值来解算动态伪距单点定位和动态精密单点定位结果,然后分析解算国内5个IGS站精密单点定位结果和双差网解结果。结果表明:单历元的伪距单点定位的精度比通常情况下的伪距单点定位要高出一个数量级,而单历元的精密单点定位结果要比通常定位软件数据预处理后的精度高0.5～1.5cm;利用精密单点定位解算IGS站获得的定位结果内符合精度均在2mm以内,外符合精度均在1～3cm,而双差网解获得的定位结果内符合精度均在1.5mm以内,外符合精度均在毫米级。
In order to improve the accuracy of precise single point positioning and double difference network calculation,this paper proposed an improved method to enhance GNSS positioning accuracy with the phase smoothing pseudo range:the pre-processing steps were given,the single point positioning of dynamic pseudo range and dynamic precise point positioning were obtained by analyzing the processed observation values,and the results of precise single point positioning and double difference network solutions of 5 IGS stations in China were calculated.Results showed that the single point positioning accuracy of single epoch pseudorange would be one order higher than that of usual pseudorange,while the precise single point positioning accuracy of single epoch would be 0.5～1.5 cm higher than that of usual positioning software data preprocessing;the internal accuracy by precise point positioning solution algorithm for IGS station could be higher than 2 mm,the external accuracy could be 1～3 cm,meanwhile,the internal accuracy by double difference network solutions could be higher than 1.5 mm,and the external accuracy could be in millimeter level.
In order to improve the accuracy of precise single point positioning and double difference network calculation,this paper proposed an improved method to enhance GNSS positioning accuracy with the phase smoothing pseudo range:the pre-processing steps were given,the single point positioning of dynamic pseudo range and dynamic precise point positioning were obtained by analyzing the processed observation values,and the results of precise single point positioning and double difference network solutions of 5 IGS stations in China were calculated.Results showed that the single point positioning accuracy of single epoch pseudorange would be one order higher than that of usual pseudorange,while the precise single point positioning accuracy of single epoch would be 0.5～1.5 cm higher than that of usual positioning software data preprocessing;the internal accuracy by precise point positioning solution algorithm for IGS station could be higher than 2 mm,the external accuracy could be 1～3 cm,meanwhile,the internal accuracy by double difference network solutions could be higher than 1.5 mm,and the external accuracy could be in millimeter level.
引文
[1]王江林,文述生.GNSS多系统静态基线数据的统一处理方法[J].导航定位学报,2013,1(1):52-55.
[2]唐卫明,刘智敏.GPS载波相位平滑伪距精度分析与应用探讨[J].测绘信息与工程,2005,30(3):37-39.
[3]范士杰,郭际明,彭秀英.GPS双频相位平滑伪距及其单点定位的精度研究[J].测绘工程,2005,14(4):39-42.
[4]韩保民,欧吉坤.基于GPS非差观测值进行精密单点定位研究[J].武汉大学学报(信息科学版),2003,28(4):409-412.
[5]刘经南,叶世榕.GPS非差相位精密单点定位技术探讨[J].武汉大学学报(信息科学版),2002,27(3):234-240.
[6]刘小明,任雅奇,姚飞娟.高精度GPS数据处理中IGS站的选取[J].测绘科学,2014,39(6):21-24.
[7]吴江飞,黄铖.GPS精密单点定位模型及其应用分析[J].大地测量与地球动力学,2008,28(1):96-100.
[8]郝明,王庆良,崔笃信.GPS精密单点定位快速收敛方法研究[J].大地测量与地球动力学,2009,29(2):88-91.
[9]蔡艳辉,程鹏飞,李夕银.GPS伪距改正及精密动态单点定位精度分析[J].全球定位系统,2004,29(2):24-26.
[10]张民伟,郭际明,黄全义.基于GPS双频P码伪距进行单点定位研究[J].地理空间信息,2005(3):21-22.
[11]范士杰,孔祥元.基于Hatch滤波的GPS伪距相位平滑及其在单点定位中的应用[J].勘察科学技术,2007(9):13-15.
[12]李征航,赵晓峰,蔡昌盛.利用双频GPS观测值建立电离层延迟模型[J].测绘信息与工程,2003,28(1):41-44.
[2]唐卫明,刘智敏.GPS载波相位平滑伪距精度分析与应用探讨[J].测绘信息与工程,2005,30(3):37-39.
[3]范士杰,郭际明,彭秀英.GPS双频相位平滑伪距及其单点定位的精度研究[J].测绘工程,2005,14(4):39-42.
[4]韩保民,欧吉坤.基于GPS非差观测值进行精密单点定位研究[J].武汉大学学报(信息科学版),2003,28(4):409-412.
[5]刘经南,叶世榕.GPS非差相位精密单点定位技术探讨[J].武汉大学学报(信息科学版),2002,27(3):234-240.
[6]刘小明,任雅奇,姚飞娟.高精度GPS数据处理中IGS站的选取[J].测绘科学,2014,39(6):21-24.
[7]吴江飞,黄铖.GPS精密单点定位模型及其应用分析[J].大地测量与地球动力学,2008,28(1):96-100.
[8]郝明,王庆良,崔笃信.GPS精密单点定位快速收敛方法研究[J].大地测量与地球动力学,2009,29(2):88-91.
[9]蔡艳辉,程鹏飞,李夕银.GPS伪距改正及精密动态单点定位精度分析[J].全球定位系统,2004,29(2):24-26.
[10]张民伟,郭际明,黄全义.基于GPS双频P码伪距进行单点定位研究[J].地理空间信息,2005(3):21-22.
[11]范士杰,孔祥元.基于Hatch滤波的GPS伪距相位平滑及其在单点定位中的应用[J].勘察科学技术,2007(9):13-15.
[12]李征航,赵晓峰,蔡昌盛.利用双频GPS观测值建立电离层延迟模型[J].测绘信息与工程,2003,28(1):41-44.