磁异常的最小均方差滤波化极

本方法是波数域磁异常化极的正则化方法,能增强化极算子的稳定性,同时压制高波数干扰.对低纬度地区及干扰严重的中低纬度地区航磁异常化极,能压制磁南北方向的条带状干扰,获得稳定结果.对含有较高噪声水平的高精度地面磁测△T异常化极,不论纬度高低,都能较大程度地压低噪声水平,得到高质量的化极结果.

THE LEAST MEAN-SQUARE ERROR FILTERING REDUCTION TO THE POLE OF MAGNETIC ANOMALIES

As a regularization technique for reduction to the pole of wavenmber dcmainmagnetic anomalies, the method can enhance the stableness of the operator of the raductionto the pole, and suppress the interference of high wavenumber. As for the reduction to thepole of aeromagnetic anomalies in low latitude area and middle-low latitude area with graveinterference,the method can suppress banded magnetic interference in north-south directionand produce stable results. In the case of redoction to the pole for △T anomnalies of highprecision ground magnetic survey with effective high noise level, it can considerably suppressthe noise level and gain high-quality reduction to the pole results,regardless of the latitude.