利用半参数模型精化GPS单点定位

Refining the remained systematic error in GPS signal using semiparamatric model

为了减弱GPS单点定位中残余的系统偏差对参数估值精度的影响,在误差方程中引入一非参数分量来表示测量中残余的系统误差,即利用半参数模型来精化GPS绝对定位的函数模型。利用实测GPS数据检验了此算法的有效性,计算结果表明:该算法在一定程度上能够消除平差模型中残余的系统偏差。

In order to reduce the influence of the remained systematic error in GPS single positioning on the estimations of the unknown parameters, non - paramatrics are induced to fit the remained systematic error in this paper, that is to use the semiparamatric model to refine the functional model of GPS single positioning. Finally, an example is constructed to explain the method. It is shown by the theory and calculation that the semiparamatric model is not only guaranteed the reliability of the estimated unknown parameters in some degree but also identified the remained systematic error in GPS single positioning.