GPS差分基准站高精度基准坐标测定方法研究

为提高基准站基准坐标定位精度,针对基于接收机长时间观测进行等权平均确定基准坐标的直接测量法不足之处,提出利用载波相位平滑伪距改善伪距测量精度。并基于平滑伪距分别对最小二乘法、卡尔曼滤波、衰减记忆滤波三种定位模型进行仿真分析。仿真结果表明:基于载波相位平滑伪距的衰减自适应记忆滤波定位方法能够有效提高定位精度,为差分基准站获取高精度位置坐标适用方法。

Research On The Method Of Obtaining High Precision Reference Coordiate Of The GPS Differential Reference Station

In order to improve the reference coordiate positioning precision and aim at the shortcomings of the direct method of measurement which is based on receiving the observed data of long time and averaging the positioning to obtain the reference coordiate,the carrier phase smoothing pseudorange is put forward to improve the pseudorange measurement precision.The three methods of localizing of Iterative Least Square,Kalman filtering and attenuated memory filtering are simulated and analysis based on the carrier phase smoothing pseudorange.The simulatin results show that the attenuated memory filtering based on the carrier phase smoothing pseudorange can effectively improve the position accuracy and it is suitable for obtaining the high precision reference coordiate of GPS differential reference station.