Paper Summary
Two methods have recently been published for carrying out nonstationary spectral broadening (and narrowing) of PS data after it has been mapped into the PP time domain. We present a study which investigates these two papers by Bansal & Matheney (2010) and by Gaiser (2011) (see also Gaiser et al., 2011a,b). The two approaches differ in purpose, in method of PS-toPP time mapping, in proposed spectral corrections, and in methods for applying those corrections. In the context of comparing these two studies we add some clarification of fundamental resolution issues and illustrate our points with simple synthetic seismograms.
