卫星导航系统主控站模拟测试与评估关键技术研究
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摘要
在卫星导航系统建设中,主控站地面运控系统担负着导航数据处理的重要工作。为了保证地面运控系统数据处理的精度,需要建设一套对地面运控系统所产生的导航信息精度进行检验的系统,这就是地面运控模拟测试与评估系统。本文以此为背景,研究地面运控系统数据处理的原理和方法、导航信息生成算法,并针对这些方法和算法,选取导航信息中对用户定位精度影响重大的关键参数,从不同角度进行研究,提出对导航信息精度进行测试评估的方法。本文主要研究的内容包括:
1.卫星广播星历精度测试方法和卫星轨道确定精度测试方法。首先研究了卫星导航系统所涉及的坐标系统及其之间的转换方法、多种轨道类型的广播星历拟合方法以及由广播星历计算卫星轨道的方法。然后在此基础上,提出广播星历精度测试和轨道确定精度测试的方法;
2.卫星钟差及等效钟差精度测试方法。首先研究了卫星导航系统时间同步技术、卫星钟差参数拟合方法和等效钟差拟合方法,然后针对这些方法,从另一个角度提出了地面运控系统所发布的卫星钟差参数和卫星等效钟差参数的精度测试方法;
3.电离层网格垂直延迟及模型参数精度测试方法。首先论述了电离层网格垂直延迟和电离层模型参数的计算原理和方法,然后研究了穿刺点和网格点电离层垂直延迟的求法,最后提出电离层延迟改正误差精度和电离层模型参数误差精度测试方法;
4.完好性测试方法。首先分析研究了完好性参数RURA、UDRE和GIVE的需求和算法,然后研究完好性的评估方法,以另一种思想和方法评估完好性。
论文所研究的各种测试评估方法,不但在我国新一代卫星导航系统研制过程中得到验证,而且在工程建设中已得到应用。测试评估方法能够准确地测试地面运控系统所发播的导航信息的精度,具有一定的理论意义和工程应用价值。
On the construction of Satellite Navigation System, Ground Operational Control System of Master Control Station plays an important role in processing navigation data. A system which is called Simulation Test and Evaluation is needed to be built to test the precision of the data processed by Ground Operational Control System. On this background, this paper researched on the rationale and method of data processing by Ground Operational Control System, and the navigation information generating algorithm. Based on these algorithms, the key elements in the navigation information, which have an important influence on the user’s positioning precision, are selected to investigate, and on a different point of view, the ways for test and evaluation of the precision for navigation information were put forward. The main contents of this paper include:
1. The precision test algorithm of the satellite broadcast ephemeris and orbit determination. Firstly, the coordinate systems and their conversion, the algorithm of broadcast ephemeris for multiform orbits, and the calculating satellite’s position and velocity with broadcast ephemeris are researched. And then, the precision test for the broadcast ephemeris and orbit determination are put forward;
2. The precision test algorithm of satellite clock error and equivalent satellite clock error. Firstly, the technology of time synchronization, the algorithm of satellite clock error and equivalent satellite clock error’s parameters are researched. And then, with this technology, the precision test of the clock error and equivalent satellite clock error issued by Ground Operational Control System are researched on the other point of view.
3. The precision test algorithm of ionospheric grid vertical delay and ionospheric model parameter. Firstly, the principle and method of ionospheric grid vertical delay and ionospheric model’s parameters are discussed. And then the algorithm of the ionospheric grid vertical delay at the puncture points and grid points are researched. Finally, the precision test of error correction of ionospheric delay and ionospheric model’s parameters precision are presented.
4. The precision test algorithm of integrity. Firstly, the need and algorithm of integrity parameters RURA, UDRE and GIVE are analyzed. Then, the Evaluation of integrity RURAI, UDREI and GIVEI is researched to test the integrity on the other way.
The different ways of test and evaluation researched on this paper are not only proved in the construction of our nation’s new generation satellite navigation system, but also used in the project. The Test and Evaluation technology can test the precision of the navigation information broadcasted perfectly by Ground Operational Control System. It has a theoretical significance and is valuable in the engineering.
1.卫星广播星历精度测试方法和卫星轨道确定精度测试方法。首先研究了卫星导航系统所涉及的坐标系统及其之间的转换方法、多种轨道类型的广播星历拟合方法以及由广播星历计算卫星轨道的方法。然后在此基础上,提出广播星历精度测试和轨道确定精度测试的方法;
2.卫星钟差及等效钟差精度测试方法。首先研究了卫星导航系统时间同步技术、卫星钟差参数拟合方法和等效钟差拟合方法,然后针对这些方法,从另一个角度提出了地面运控系统所发布的卫星钟差参数和卫星等效钟差参数的精度测试方法;
3.电离层网格垂直延迟及模型参数精度测试方法。首先论述了电离层网格垂直延迟和电离层模型参数的计算原理和方法,然后研究了穿刺点和网格点电离层垂直延迟的求法,最后提出电离层延迟改正误差精度和电离层模型参数误差精度测试方法;
4.完好性测试方法。首先分析研究了完好性参数RURA、UDRE和GIVE的需求和算法,然后研究完好性的评估方法,以另一种思想和方法评估完好性。
论文所研究的各种测试评估方法,不但在我国新一代卫星导航系统研制过程中得到验证,而且在工程建设中已得到应用。测试评估方法能够准确地测试地面运控系统所发播的导航信息的精度,具有一定的理论意义和工程应用价值。
On the construction of Satellite Navigation System, Ground Operational Control System of Master Control Station plays an important role in processing navigation data. A system which is called Simulation Test and Evaluation is needed to be built to test the precision of the data processed by Ground Operational Control System. On this background, this paper researched on the rationale and method of data processing by Ground Operational Control System, and the navigation information generating algorithm. Based on these algorithms, the key elements in the navigation information, which have an important influence on the user’s positioning precision, are selected to investigate, and on a different point of view, the ways for test and evaluation of the precision for navigation information were put forward. The main contents of this paper include:
1. The precision test algorithm of the satellite broadcast ephemeris and orbit determination. Firstly, the coordinate systems and their conversion, the algorithm of broadcast ephemeris for multiform orbits, and the calculating satellite’s position and velocity with broadcast ephemeris are researched. And then, the precision test for the broadcast ephemeris and orbit determination are put forward;
2. The precision test algorithm of satellite clock error and equivalent satellite clock error. Firstly, the technology of time synchronization, the algorithm of satellite clock error and equivalent satellite clock error’s parameters are researched. And then, with this technology, the precision test of the clock error and equivalent satellite clock error issued by Ground Operational Control System are researched on the other point of view.
3. The precision test algorithm of ionospheric grid vertical delay and ionospheric model parameter. Firstly, the principle and method of ionospheric grid vertical delay and ionospheric model’s parameters are discussed. And then the algorithm of the ionospheric grid vertical delay at the puncture points and grid points are researched. Finally, the precision test of error correction of ionospheric delay and ionospheric model’s parameters precision are presented.
4. The precision test algorithm of integrity. Firstly, the need and algorithm of integrity parameters RURA, UDRE and GIVE are analyzed. Then, the Evaluation of integrity RURAI, UDREI and GIVEI is researched to test the integrity on the other way.
The different ways of test and evaluation researched on this paper are not only proved in the construction of our nation’s new generation satellite navigation system, but also used in the project. The Test and Evaluation technology can test the precision of the navigation information broadcasted perfectly by Ground Operational Control System. It has a theoretical significance and is valuable in the engineering.
引文
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