图4. 部分数据处理结果对比 a—含噪声球体模型磁异常;b—5×5窗口滑动平均滤波;c—y方向一阶导数;d—向上延拓10 m磁异常
Fig.4. Comparison of data processing results a—magnetic anomaly of a sphere model with white noise;b—5×5window moving average filtering;c—first derivative in y direction;d—upward continuation magnetic anomaly for 10 m