重力资料处理中的坐标转换问题研究

Research on coordinate transformation in gravity data processing

鉴于现有重力站点仅具备大地经纬度和水准高信息,但在重力场研究领域需要点位的地心坐标信息。文中基于该问题提出利用已有信息获得地心纬度的三种方法,并通过数值试验对转换方法进行了分析比较。结果表明:大地水准面模型法的转换精度最高、两步法的转换精度较大地水准面模型法略低、一步法的精度最低。

In view of the fact that the existing gravity stations only had the information of the latitude,longitude and high level,the geocentric coordinate information of the points was needed in the field of gravity field.In the paper,based on this problem,three methods to obtain the geocentric latitude were proposed by using existing information,and the transformation methods were analyzed and compared through numerical experiments.The results showed that the conversion accuracy of geoid model method was highest;the conversion accuracy of two-step method was slightly lower than that of one-step method.