Abstract

Elimination of coherent linear noise in seismic data is usually carried out with either F-K filtering or by radial trace transform, both of which involve transformation to another domain and back. This, however, introduces its own artifacts. In addition, F-K filtering suffers from aliasing problems and the strict requirement of uniform source-receiver offsets while accurate trace interpolation in the x-t domain is a must for effective filtering of linear noise in the transformed radial trace domain1 . A new variant to the radial trace concept has been introduced recently2 in which a local radial trace is constructed centered at each trace sample of a shot record along the direction intermediate between a fan-like zone defining the extent of the linear noise. The median of the sample values along this local radial trace spanning over neighbouring traces represents the linear noise at that trace sample point. The attractive features of this approach are (1) no transformation to a different domain is required and (2) a simple linear interpolation may be employed to generate local radial traces in case of missing data.