GPS附合网三维平差的方法和应用
首发时间:2005-03-10
摘要:提出了对城市及工程GPS网作附合网平差的意义和方法,与现有软件所采用的方法不同,不再是仅固定一个点的三维坐标以外,其余固定点只是固定其大地经纬度,而是固定全部固定点的三维坐标。这样不仅适应于已建有国家、省级GPS网以及一些城市GPS基准站网的新形势,而且能因加入高精度的基准点来提高城市工程GPS网的精度、统一到新的全国大地基准。在所研制的软件中采用了消去未知参数及附加基准方程两种算法,经实测GPS附合网数据验证,所得结果完全相同。
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The Algorithm and Application of Three Dimensional Adjustment of GPS Networks with Several Fix Points
Abstract: This paper puts forward the principle and method of 3D adjustment for GPS networks with several fix points. The method is differed from the traditional methods that are used in the current software . The traditional methods can keep only the 3D coordinates of one point and geodetic longitudes and latitudes of other fix points unchanged, whereas the new method presented in this paper can keep the 3D coordinates of all fix points unchanged. It can not only adapt the new situation that our country and some provinces have built GPS networks with high precision and some cities have established several GPS base stations, but also improve the precision of GPS networks, bring GPS networks into the national geodetic system by introducing some GPS points with high precision as fixed points. The software has used in Ningbo control network and the results are adopted.
Keywords: GPS network with several fix points 3D adjustment fix point datum equation
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