GPS非差相位精密单点定位算法研究  

GPS Precise Point Positioning Algorithm Using One-way Phase Observations

作　　者：琚兴华 

机构地区：[1]河南省有色金属地质矿产局第一地质大队,河南郑州450016

出　　处：《全球定位系统》2012年第1期44-49,共6页Gnss World of China

摘　　要：在VC++开发环境下编写了非差精密单点定位的软件,利用该软件分析了在给定不同初始方差的情况下,对滤波结果的影响,以及采用不同采样率的数据进行计算时,定位精度的比较。实验分析表明:选择合适的初始协方差能使滤波快速的收敛,选择的经验方差能使滤波达到较好的收敛速度,但对滤波稳定后的定位精度没有影响。通过不同采样率数据的定位结果比较证明了高采样率数据的定位精度高于低采样率数据的精度。Software of precise point positioning is programmed with the Visual C＋ ＋, the affection to the result by giving different initial covariance is analyzed, and the accuracy of result by using different sampling interval data is compared. The experiment indicates that appropriate initial covariance can make filter converge fast, empirical initial covariance can make the filter a fast convergent speed, but it does not affect the accuracy of result after the filter become steady. In the end, the results calculated by the data of different sampling interval are compared. It proves that the result with high sampling interval has a higher accuracy than that of low sampling interval.

关 键 词：GPS定位 精密单点定位 误差模型 卡尔曼滤波估计 

分 类 号：P228.4[天文地球—大地测量学与测量工程]