Abstract：We design a new filter whose operator is elliptic in f-k domain. The new filter, being different from usual two-dimensional filters,is characterized by no sharp apex,analytics,continuous first order and second order derivatives. Application examles of the filter in data processing are given in the paper. To speak in detail,the adjacent NMO trace gathers in an enlarged common-reflection bin are combined into one big NMO trace gather ,in which traces are rearranged in a special way;then e1lipse filtering in f-k domain is applied to the big NMO trace gathers to express noises. Real data processing shows that the filtering method not only raises signal/noise ratio of seismic data but also preserves waveform and amplitude characteristics of reflection signals.
