GPS高程拟合的应用

摘要

在GPS水准拟合原理的基础上，介绍了确定似大地水准面的原理与方法，分析了用数学模型法和少量GPS与水准重合点，将GPS大地高直接转换为具有厘米级正常高的实现方法。实验结合玉铁铁路某段GPS控制网，应用二次曲面法、移动曲面法和多面函数法进行拟合，得到相应的正常高，并根据已知水准高程进行精度分析和比较，探讨各模型的适用性。%Based on the principle of GPS elevation fitting, several common mathematical models of elevation fitting method are introduced. Also, with the models of quadric surface, multi-face function and mobile surface interpolation combined with part of Yutie railway GPS control net, the result of the control points＇ normal height. By comparison with our known leveling height is presented, these models＇ usability and application that mentioned above are discussed.