基于多项式拟合模型的实测海磁数据平差处理

Adjustment of measured marine geomagnetic data based on the polynomial fitting model

通过对海洋实测地磁数据和不同阶次多项式拟合模型的几何特征进行分析,提出了利用多项式拟合模型对实测地磁数据进行平差处理的方法 .根据不同测线上交叉点地磁场强度差值的特点,分别采用不同阶次的多项式拟合模型对地磁数据分区进行平差处理,最后通过比较平差处理总精度值和生成的磁场强度等值线图验证了本文提出的平差处理方法的有效性.

Through analysis of measured marine geomagnetic data and geometric characteristics of different order polynomial fitting models, a treatment method is proposed using the polynomial fitting model to adjust the measured geomagnetic data. Based on the characteristics of geomagnetic field intensity difference of crossing points on different survey lines, different order polynomial fitting models are setup to adjust the geomagnetic data. The provided adjustment method is effective to improve precision of measured geometric data, which is proven by comparing the adjustment overall accuracy value and generated geomagnetic field intensity contour map.