GPS误差的时间序列分析建模研究

定位精度是影响全球定位系统(GPS)应用的重要因素之一,目前采用的差分GPS虽然能够有效地提高定位精度,但属于非自主式定位方法,易被发现和攻击,限制了系统的应用范围;而组合导航定位系统结构复杂,实现成本较高。利用时间序列分析方法,分析GPS误差序列的统计特性,建立误差模型,可有效地改善GPS预报结果,提高定位精度。结合实际采样数据,给出了具体实现方法,实验结果表明了利用时间序列分析方法进行GPS数据建模分析的有效性及可行性。

Studying on GPS Errors Modeling by Time Series Analysis

Position accuracy is one of the most important factors that will affect the application of Global Positioning System(GPS).Differential GPS(DGPS) can get higher position precision significantly.But it is a non-independend positioning method.Systems are detected and attacked easily.These factors will limit its applying ranges.On the other hand,the constructs of GPS multi-function integrated navigation and positioning system are more complicated,and the system costs are higher.The error series are analyzed and modeled by time series analysis.It could perfect the forecasting results of GPS obviously.And it is an independend position method.Combining with practical sampling data,a GPS error series analyzing and modeling method is presented.Simulation results show that the proposed approach is satisfactory.