第二部分是移动曲面拟合法的研究和改进。
In the second part, we mainly research and improve the moving surface fitting.
为此，提出利用地球重力场模型改进GPS水准中移动曲面法的方法。
This paper is mainly about how to improve moving surface method of GPS leveling by means of earth's gravity field model.
试算结果表明，当数据点受异常污染时，抗差移动曲面法较移动曲面法有效。
When data points are abnormal, the later is more effective than the former through numerical results.
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