抗差估计在GPS网平面坐标转换中的应用

Coordinate Transformation for GPS Network based on Robust Estimation

为了消除转换基准点中存在的显著位移对求解转换参数的影响,基于最小二乘原理,给出了抗差估计理论求参的转换模型、处理流程及转换后的地面网精度评定的方法。通过实例分析,验证了运用该模型进行坐标转换的准确性和可靠性。

In order to eliminate the impact of the displacements existing in the transfor- mation reference points, based on the principle of least square, the robust estimation model of solving transformation parameters and its data processing flows and the accuracy evalua- tion indexes of the transformed GPS network are given. By analyzing an example, it verifies the accuracy and the reliability of using this model to carry on the coordinate transformation.