提高手持GPS定位精度的方法研究

The method research of improving the location precision of hand-held GPS

通过对仪器参数的2种设置方法的比较,提出提高手持GPS定位精度的方法.由内符合稳定性试验可知,实时和3,5min定位剔除粗差点后的精度分别是10.1,6.7,4.6m,说明实时定位稳定度不可靠,定位时长应在3min能保证有稳定的观测结果.由参数设置法对比试验可知,标准五参数设置法平面中误差为3.6m,三维中误差为5.6m;简易五参数设置法平面中误差为4.9m,三维中误差为11.0m.因此,为了提高定位精度,应尽量采用标准五参数法.

The paper puts forward the methods and the train of thoughts for upgrading the location precision of hand-held GPS, through the comparative study of two methods for fixing parameters of hand-held GPS. From the internal matching stability experiments, it can be seen that the real-time, 3 min and 5 min location precision are respectively 10.1 m, 6.7 m and 4.6 m after getting rid of the error. Conclusion is that the real-time location stability is unreliable; location time within 3 min can guarantee the stable observation. From the comparative experiment by the way of parameters setting method, the mean square error in plane is 3.6 m and the three dimensional mean square error is 5.6 m while the setting method uses standard five parameters; but in simple five parameters, the mean square error is 4.9 m; in three dimensional mean square error is 11.0 m. To improve the location precision of hand-held GPS, the standard five parameters method is suggested.