# Translations:Signature deconvolution - book/1/en

How is signature deconvolution implemented? A first empirical rule for seismic processing is that known things should be removed first. Once the known signature has been removed, the task of removing the unknown things becomes easier. A second (and obvious) empirical rule says that if an operation can be carried out simply, then a more complicated way to achieve the same result should not be attempted. If these rules are followed, removal of a known air-gun ringing wavelet or a known instrument response or a known vibroseis sweep signal becomes simple and easy to understand. All these methods have in common the removal of a known signature wavelet. The method is the same, no matter whether the known waveform is an air-gun signature, an instrument response, or a vibroseis sweep. The known quantities are the trace *x* and the signature *s*. The desired quantity is the signature-free trace *z*. The model is . *Signature deconvolution* involves the following steps: