THE USE OF LINEAR FILTERING IN GRAVITY PROBLEMS?

The technique of Fourier analysis is reviewed the hanning window or the hamming window, and the equivalence and relative advantages of since these windows minimize the Gibbs phe-convolution filtering in the space domain and nomenon associated with the downward continua-multiplication filtering in the frequency domain tion or high-pass filtering operation. New sets of are demonstrated with actual field examples. coefficients for convolution filtering, based upon We discuss the design of ideal filters in terms of Fourier transform theory and the sampling the relationships between the main lobe and the theory, are derived. side lobes. Cut-and-try methods appear to favo