抗差部分岭估计及其在GPS快速定位中的应用

ROBUST PARTIAL ORDINARY RIDGE ESTIMATOR AND ITS APPLICATIONS IN GPS POSITIONING

针对GPS快速定位中观测资料含有粗差且因观测信息不足造成设计阵“部分病态”的实际情况,对现有的抗差有偏估计进行改进,提出了一种新的抗差有偏估计——抗差部分岭估计,并讨论了抗差部分岭估计中“部分岭参数”的选择方法。计算结果显示,新估计与现有的抗差有偏估计相比,具有精度高、速度快、稳定性好的特点。

It is a difficult to determine the position in fast GPS positioning because of containing the outliers in observation data and the lack of enough observation information to make the design array be in partial ill-condition. A new robust biased estimator-robust partial ordinary ridge estimator （RPORE） is proposed. The selection method for choosing the partial ridge parameter is established. The computed results of GPS data show that the new estimator has the characteristics of high precision, fast speed and stability.