DECONVOLUTION OF A DIRECTIONAL MARINE SOURCE

A single source firing below the surface of the ocean, because of the surface reflection, has directionality. Conceptually the radiation field of such a source may be treated as due to a vertical dipole of finite length. A formulation for transforming data recorded with a dipole wavelet to that of a monopole or plane-wave wavelet is derived in this study. We have found that the cylindrical τ-p transform allows the removal of the source waveform and amplitude variation in the data due to the dipole and observed on the offset-time record. The spherical wave field of a vertical dipole can be expanded in a conical bundle of plane waves. -from Authors