本文所研究的是一种在地下场源分布未知的情况下,突出预定深度场源重、磁异常的滤波方法.文中介绍了基本原理,给出了有确定物理意义的滤波算子,并列举了在理论模型场和实测重力场上进行滤波计算的结果.方法原理位于(ξ,η,z)处的球体的磁场强度沿某一方向的分量,用函数f(x,y)表示,其谱函数用F(ων)表示,式中代ω,ν表圆频率.则 What we study in this paper is a filtering method that emphasizes field source gravity and magnetic anomalies at a predetermined depth with unknown distribution of field sources.This paper introduces the basic principle and gives the filter operators with definite physical meaning, The results show that the magnetic field intensity in a certain direction at (ξ, η, z) is expressed by the function f (x, y) The spectral function is expressed by F (ων), where ω and ν are the circular frequencies