Estimation of the source signature, an old and important problem in exploration seismology, is becoming even more important. Areas where this knowledge is potentially of great value are onboard source array QC, deconvolution, multiple attenuation, tying reflection data to wells, modeling and inversion, AVO analysis, reservoir monitoring, and analysis of marine multicomponent recordings.

In another article in this special section, Landrø discusses the motivation for recording data on a short streamer (typically 50 m) deployed below (typically 10–20 m) the source array to determine the far-field source signature. Landrø and Sollie (Geophysics, 1992) developed a nonlinear inversion method...

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