STUDY ON CONSTRUCTION OF LOCAL MARINE GEOMAGNETIC FIELD MODEL BASED ON ORTHOGONAL LEAST SQUARE MULTI-SURFACE FUNCTION
基于正交最小二乘多面函数构建局域海洋地磁场模型研究

Aim at the problem of quality control and node choice in modeling local marine geomagnetic field based on multi-surface function,a fitting method with combining robust trend surface and orthogonal least squares is proposed.In order to control the influence of some outstanding points to surface fitting,a robust fitting of the trend surface by using an equivalent weight is adopted and the adaptive node choosing method is proposed based on the effect of every node on the curve fitting calculated by using the orthogonal least squares as well.The results show that this method is more effective in accuracy and stability than normal method.