RTK数据处理及接收机测量数据质量影响研究

发布时间：2018-04-18 15:01

本文选题：RTK + 数据处理　；参考：《国防科学技术大学》2014年硕士论文

【摘要】：卫星导航应用的实现需要基于卫星导航接收机提供的测量数据,其测量数据质量直接影响着卫星导航应用的性能。卫星导航应用领域不断向着高精度方向发展,例如精密大地与精密工程测量、地壳运动与工程形变监测、RTK测量等。RTK(Real Time Kinematic,实时动态)技术是一种利用高精度载波相位测量值进行实时动态相对定位的技术;高精度测量型接收机则是注重实现高精度测量数据质量的卫星导航接收机。常规的接收机性能评估指标不能完全刻画高精度应用领域的特殊需求,现有文献对高精度接收机测量数据质量如何影响RTK系统性能的问题研究较少。本文对此展开研究,主要工作有以下三个方面:(1)针对RTK技术展开研究,分析了RTK技术的主要观测模型、测量误差源以及RTK数据处理方法,利用本单位自研监测接收机搭建了RTK软硬件研究平台,并进行了GPS(Global Positioning System,全球定位系统)与BDS(BeiDou navigation System,北斗系统)的实测数据处理与分析,其中,GPS的L1频点数据在该次实验中的处理结果为平面精度0.93mm、高程精度0.77mm,BDS的B3频点数据在该次实验中的处理结果为平面精度0.28mm、高程精度0.28mm,实验结果验证了RTK软件研究平台的有效性。(2)针对RTK数据处理技术中的电离层残差周跳探测与修复方法,当两个频点于同一历元发生周跳时无法有效地进行周跳修复的问题,提出了一种基于多普勒辅助的电离层残差法。通过实验分析证明了该改进方法有效解决了电离层残差法存在的前述问题,当两个频点于同一历元发生周跳时,改进的方法也能修复周跳,提高了电离层残差法探测与修复周跳的准确性与可靠性。(3)针对目前RTK系统性能指标较为明确,但缺乏高精度接收机测量质量评估指标,不能独立衡量高精度接收机设计优劣的问题,提出基于测量数据质量的高精度测量型接收机评估指标,利用仿真分析方法量化分析了高精度接收机的伪距测量精度、载波相位测量精度、载波相位周跳特性等测量数据质量指标对RTK系统性能的影响,分析结果对高精度测量型接收机的设计与研发有一定的参考意义。
[Abstract]:The implementation of satellite navigation applications needs to be based on the measurement data provided by the satellite navigation receiver. The quality of the measurement data directly affects the performance of satellite navigation applications.Satellite navigation applications continue to develop in the direction of high accuracy, such as precision geodetic and precision engineering surveying,RTK Real Time Kinematic (real-time dynamic) technology is a kind of real time relative positioning technology based on high precision carrier phase measurement.High-precision measurement receiver is a satellite navigation receiver which focuses on the quality of high-precision measurement data.Conventional receiver performance evaluation indexes can not fully describe the special requirements of high-precision applications. There is little research on how the quality of measurement data of high-precision receivers affects the performance of RTK systems.The main work of this paper is as follows: 1) the RTK technology is studied, and the main observation model, measurement error source and RTK data processing method of RTK technology are analyzed.The software and hardware research platform of RTK is built by using the self-developed monitoring receiver of this unit, and the measured data processing and analysis of GPS(Global Positioning system (Global Positioning system) and BDS(BeiDou navigation system (Beidou system) are carried out.In this experiment, the processing result of L1 frequency point data of GPS is 0.93 mm, the height accuracy 0.77 mm and B3 frequency data of BDS are 0.28 mm and 0.28 mm respectively. The experimental results verify the research of RTK software.The effectiveness of the platform. (2) aiming at the ionospheric residual cycle slip detection and repair methods in RTK data processing technology,When two frequency points occur at the same epoch, the cycle slip can not be repaired effectively. A doppler-assisted ionospheric residual method is proposed.The experimental results show that the improved method can effectively solve the problems mentioned in the ionospheric residual method. When two frequency points occur at the same epoch, the improved method can also repair the cycle slip.The accuracy and reliability of the ionospheric residual method for detecting and repairing cycle slips are improved.The evaluation index of high precision receiver based on data quality is put forward, and the pseudo-range measurement accuracy of high precision receiver is quantitatively analyzed by simulation analysis method.The influence of carrier phase measurement accuracy and carrier phase cycle slip characteristics on the performance of RTK system is discussed. The analysis results have some reference significance for the design and development of high precision measurement receiver.
【学位授予单位】：国防科学技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN967.1

【相似文献】