GPSSA误差建模和对组合导航系统性能的影响

GPS SA Error Modelling and its Effect on the

本文探讨了ＳＡ建模，即采用ＦＦＴ对ＴＡＮＳ－２接收机实测的ＧＰＳ静态定位误差样本作功率谱分析，并通过最小二乘拟合，获得ＳＡ的平稳线性模型；本文还用车载组合导航系统的仿真结果验证了近似模型的有效性。

This paper demonstrates the modelling of GPS SA error. static position error samples recorded with TANS-2 receiver are analysed in frequency domain via FFT to ger the SA power spectrum, and the SA stationary linear model is obtained approximately via least-squares fit.The approximate model is used in the simulation of the vehicle integrated navigation system and the results show its effectiveness.