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The Application of Earth Gravity Field in GPS Height Transformation
Author(s): 
Pages: 52-53,62
Year: Issue:  2
Journal: Geotechnical Investigation & Surveying

Keyword:  地球重力场模型 高程异常 GPS高程转换;
Abstract: 在GPS高程转换中 ,为了减少对已知高程点的需求量 ,本文引用了地球重力场模型。采取的方法是 :选择一种拟合函数 ,将每一个GPS向量用地球重力场模型计算的高程异常差值作为观测值 ,已知高程点上用GPS求得的高程异常作为固定值 ,进行拟合处理。实例表明 ,当测段长度小于5 0km ,仅用两个已知高程点 ,高程转换精度可以满足 30L限差要求
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