GPS水准采用移去恢复技术拟合大地水准面方法的研究  

Study on the methed of GPS leveling using remove-restore technology to approach the geoid

作　　者：刘晓刚[1] 刘雁雨 曹纪东 王丽红[1] 庞振兴[1] 陈少明[1] 

机构地区：[1]信息工程大学测绘学院 [2]北京军区61081部队

出　　处：《测绘工程》2008年第3期70-73,共4页Engineering of Surveying and Mapping

摘　　要：精化大地水准面是现代重力场和大地测量学工作的重要任务之一。探讨了利用已知水准点上的高程异常拟合区域大地水准面模型时,首先移去EGM96模型计算得到的部分,然后基于移动曲面和多面函数方法分别对剩余高程异常进行拟合,在内插点上再利用EGM96模型把移去的部分恢复,得到该点的高程异常。通过对某局部地区水准点的计算表明,引入EGM96模型的拟合高程异常的精度有所改进,对于大范围地区,这种方法有望能更好地提高大地水准面的拟合精度。Refining the local geoid is an important task of the research on the gravity field and the geodetic surveying. In this paper, it discusses the method of the GPS leveling using the ＂remove-restore＂ technique to interpolate the geoid difference or the height abnormal value. EGM96 model is used for calculating height abnormal value of any points on the earth surface. When calculating the coefficients of interpolation model of the local height abnormal value, the height abnormal value on the known points is removed firstly by EGM96,the remained value is used for calculating the interpolation coefficients, then the height abnormal value of any point is calculated by the obtained interpolation model and added by the height abnormal value calculated by EGM96. This method has been used in a local area, the improvements of the height abnormal value obtained are not very significant. But for the large area, this method should he useful for the refinement of geoid.

关 键 词：GPS水准 大地水准面 EGM96模型 移去恢复 

分 类 号：P228[天文地球—大地测量学与测量工程]