GPS水准拟合模型的选取与精度估计

GPS水准拟合中,多项式曲面模型法使用率较高,但通常要人工选取已知点和检核点,带有一定的人为因素。本文在分析检核点作用的基础上,提出了一种尽量减少人工干预选取模型系数的方法,并将该法作为探测测区高程异常是否呈单一曲面的基础,给出了一般测区选取GPS水准拟合模型的步骤。此外,就用户所关心的转换正常高精度估计问题,讨论了其可能达到的精度。

Choice for fitting-model and accuracy estimating in GPS-leveling

Polynomial model is often used in GPS-leveling,in which known points and checking points need to be chosen manually.In order to decrease the manual degree,the function of checking points is analyzed and one method for detecting whether that height anomaly is submitted to a single surface is put forward.Furthermore,a model-choosing flow suiting common region is given.At the end,the probably reaching accuracy is discussed,which is concerned by many users.