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Accuracy assessment of relative and precise point positioning online GPS processing services

机译：关于在线GPS处理服务的亲属和精确点定位的准确性评估

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摘要

Over the last few years, several institutions, research centers, and organizations have developed different strategies for GPS data processing and analysis to obtain high accurate coordinates. They are taking into considerations overcoming restrictions and limitations such as necessity of using relative positioning, time consuming, and high cost of different processing software. One of these developed strategies is the web-based online GNSS (Global Navigation Satellite Systems) processing service which estimates coordinates with centimeter or decimeter level accuracy. This study aims to represent the most popular of these services, namely AUSPOS, OPUS, APPS, GAPS, Trimble RTX, and CSRS-PPP, also to perform in-between comparison of these services with respect to their achieved accuracy using field observations with different durations. The obtained results were compared with a real field data measured using traditional relative positioning technique with high accuracy standards. The set of data used in this study was performed in the Eastern zone in Egypt. The results of this comparison indicate that these services can be used as an alternative method for relative positioning technique due to their simplicity, cost-effective and saving in time. They saved about 75 % from the time required for traditional method to produce coordinate with reasonable accuracy. The maximum standard deviation obtained was 15.4 cm from APPS service with time less than two hours, while the minimum standard deviation was 0.07 cm and obtained from CSRS-PPP with time duration from 6 to 12 hours. For achieving more accurate results, it is recommended to use time duration more than two hours.
机译：在过去的几年里，几个机构，研究中心和组织已经为GPS数据处理和分析产生了不同的策略，以获得高准确的坐标。他们正在考虑克服限制和限制，例如使用不同处理软件的相对定位，耗时和高成本的必要性。其中一个开发的策略是基于Web的在线GNSS（全球导航卫星系统）处理服务，该处理服务估计具有厘米或减点级别精度的坐标。本研究旨在代表这些服务中最受欢迎的，即Auspos，Opus，Apps，差距，Trimble RTX和CSRS-PPP，也可以使用与不同的现场观测相对于它们实现的准确度进行这些服务的相比持续时间。将获得的结果与使用具有高精度标准的传统相对定位技术测量的实场数据进行比较。本研究中使用的数据集是在埃及的东部区进行。该比较的结果表明，由于其简单性，成本效益和节省时间，这些服务可以用作相对定位技术的替代方法。它们从传统方法所需的时间节省了大约75％，以产生具有合理准确性的坐标。获得的最大标准偏差为15.4cm，距离应用程序服务不到两个小时，而最小标准偏差为0.07厘米，并从6至12小时的时间持续时间从CSRS-PPP获得。为了实现更准确的结果，建议使用超过2小时的时间持续时间。

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  • 来源
    《Journal of applied geodesy》 |2019年第3期|215-227|共13页
  • 作者

    Ahmed El Shouny; Yehia Miky;

  • 作者单位

    Geomatics Department Faculty of Environment Design King AbdulAziz University Jeddah Saudi Arabia and Survey Research Institute National Water Research Center Giza Egypt;

    Geomatics Department Faculty of Environment Design King AbdulAziz University Jeddah Saudi Arabia and Civil Engineering Department Faculty of Engineering Aswan University Aswan Egypt;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    GNSS; Online Processing Services; Relative Positioning; Precise Point Positioning;

    机译：GNSS;在线处理服务;相对定位;精确点定位;

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