高精度GPS观测数据的实时仿真研究  

High Precision Real-time Simulation of GPS Measurement

作　　者：范国清[1] 王威[1] 郗晓宁[1] 

机构地区：[1]国防科技大学机电工程与自动化学院,湖南长沙410073

出　　处：《国防科技大学学报》2009年第3期60-64,共5页Journal of National University of Defense Technology

基　　金：国家863计划资助项目(2007AA12Z307)

摘　　要：针对高精度GPS观测数据实时仿真的需求,研究了观测数据仿真的基本原理、系统功能组成及适用于实时仿真的数学模型。考虑到模型实现的时间约束特性,将仿真系统结构划分为非实时层、弱实时层和强实时层,并采用分布式仿真结构建立了卫星导航观测数据实时仿真系统。算例结果表明:系统满足强实时性要求,观测数据仿真具有较高精度。This paper presents a real-time system structure for high precision GPS measurement simulation. Firstly, the principle, function composing and appropriate mathematical models used in measurement simulation were studied. Secondly, according to different time constrains of different models＇ realization, a distributed simulation system was proposed to simulate GPS measurement. The system was divided into negative real time part, week real time part and strong real time part accordingly. Finally, an investigation experiment was made. The results showed that simulation system could satisfy the strong real time demand, and the simulated measurement reached a good degree of accuracy.

关 键 词：卫星导航 GPS观测数据 分布式仿真 实时仿真 

分 类 号：P228[天文地球—大地测量学与测量工程]