重力场匹配导航的重力图生成技术

通过对当前用于海洋重力场格网插值的四种常用算法(距离倒数加权法、Kriging法、径向基函数法和改进的二次曲面Shepard方法)进行分析,以相对规则、不同密度的两组数据作为基准数据进行了插值比较。实验结果表明,基于改进的Shepard插值算法相对于其它三种算法具有速度快、精度高的优点,比较符合当前海洋重力数据获取的现状,是进行高精度重力图生成的有效方法。

Gravity map creating technology in gravity matching navigation

By analyzing the four common algorithms (i.e., inverse distance to a power method, Kriging method, modified quadratic Shepard method, and radial basis function method) used in grid interpolation of ocean gravity field, two types of data with different density and relative rule were used as reference data to make interpolation comparison. The experiment results show that the modified quadratic Shepard method is better than that of other three methods both in precision and computing speed. It is a more effective way to produce the ocean gravity map.