【作者】 谷守周；

【导师】 党亚民； 秘金钟；

【作者基本信息】 山东科技大学 ， 大地测量学与测量工程， 2010， 硕士

【摘要】 完备性研究是当前对GNSS研究的一个热点问题。完备性可以分为三个基本级别：系统级,监测站级和用户级。基于GPS数据和仿真的GALILEO数据,本文主要对系统级和监测站级的完备性算法中一些技术指标进行了相关研究,并利用VC++和Fortran语言编程GPS/GALILEO完备性计算软件。本文主要从以下几个方面进行了研究：1、分析了GPS现代化后加载的L2C的数据质量。主要从两个方面进行了对比,先是将现代化前的L1载波和L2载波以及现代化后的L1载波和L2载波信噪比数据的对比与分析,然后利用统计分析的方法对数据的稳定性进行了有效的分析和验证。2、研究了WUL的概念,模型及计算方法。分为三步：首先探讨了WUL的确定的基本原理,在此基础上研究了其计算方法,在具体的计算中采用自己提出的有效的迭代方法,并进行算法验证。3、研究了SISE和SISA的基本概念,数学原理。在WUL算法的基础之上,对SISE进行了计算,并分别采用导航星历计算的卫星坐标与IGS精密星历计算的卫星坐标之差和IGR快速星历与IGS精密星历计算的卫星坐标之差来模拟轨道误差对SISE的特点进行了分析。在此基础之上,构造t分布统计量对SISA进行了有效的计算和分析。4、研究了SISMA的基本概念,数学模型和数据处理方法。在SISE计算的基础之上,研究了SISMA的计算方法,并分别采用导航星历计算的卫星坐标和IGR快速星历对SISMA进行数据处理和算法验证,对不同的数据计算出的SISMA的特点进行了分析。5、研究了XPL的基本概念和数学模型。首先对XPL的基本概念模型进行了研究与分析,然后分别采用实际观测的GPS数据和仿真的GALILEO数据对HPL和VPL进行了计算,并比较了两个导航系统在XPL计算结果的差异。6、对GPS/GALILEO系统完备性计算软件进行了研制与开发,并利用实际数据对软件的可用性进行了的验证。更多还原

【Abstract】 Integrity is a very hot topic in the research of GNSS. Integrity is defined as that the ability of system gives alarm to the user when the navigation system cann’t be use to navigation due to its fault. It can be divided into three levels:system level, monitor station level and user level. Based on GPS data and GALILEO simulation data, this paper mainly discuss the several parameters in system level and monitor station level, and then a GPS/GALILEO integrity is compiled by use of VC++and FORTRAN program language. The main research contents are as follows:1. The quality of L2C SNR data modulated on the modern satellites is analyzed. It mainly studies from two aspects:firstly, analyzing the SNR values on the L1 and L2 frequencies of the satellites unmodulated L2C and the L1 and L2 frequencies of the modernized satellites, and then use the method of statistical analysis to analyze and verify the stability of the data.2. The concept, model and calculation method of worst user location are studied. It is divided into three stepts:firstly, discuss the basic concept of worst user location, then research on the calculation method and propose a new iterative method, finaly verify this method.3. The basic concept and mathematical principle of signal in space error and signal in space accuracy are discussed. Based on the results of worst user location, signal in space error is calculated and analyzed using the navigation data, observation data, SP3 data and IGR data, SP3 data to simulate orbit error separately. Based on that, a t distribution statistics is structure to calculate and analyze the signal in space accuracy.4. The basic concept, mathematical model and data process method of signal in space monitor accuracy are researched. Based on the signal in space error, the calculation method of signal in space monitor accuracy is proposed and vertfied by using navigation data and IGR data, and then the characters of signal in space monitor accuracy are analyzed.5. The basic concepts and mathematical models of horizontal/ vertical protection level are studied. Firstly, the calculation model of horizontal/ vertical protection level are presented, and then horizontal/ vertical protection level are calculated and the differences of GPS and GALILEO system are compared by using GPS data and GALILEO simulation data. 6. GPS/GALILEO integrity is compiled and developed and the availibity is testified by using GPS/GALILEO data.更多还原