Separation by 2-D signal and noise spectral estimation

  Coherent noise is often strong enough to interfere with the interpretation or analysis of seismic data. Coherent noises often encountered in reflection seismic data are ground roll, air blasts, and trapped waves. Typically, these noises show velocities that are different from the desired reflection events and may also have frequency spectra that can be used to distinguish them from the desired events. In this section I demonstrate a method to separate coherent noise and signal.