Here are some of the papers that we published on frequency enhancement of seismic data
2011: Mixed-phase wavelet estimation – a case study, published in CSEG RECORDER
2010: Phase stability via nonlinear optimization – a case study, published in SEG-The Leading Edge
2004: High-frequency restoration of surface seismic data, published in SEG-The Leading Edge
2004: A new approach to enhancing the bandwidth of surface seismic data, published in EAGE-First Break
2003: Enhancing seismic frequency bandwidth using VSPs – a case study, published in Oil and Gas Journal
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