A Fortran90 implementation of symmetric nonstationary phaseshift extrapolator

Yanpeng Mi, Gary F. Margrave

Symmetric nonstationary phase-shift (SNPS) for 2D (SNPS2D) is a 2D prestack shot-gather depth-imaging Fortran90 and C++ code based upon the symmetric nonstationary phase-shift theory. A brief introduction to the theoretical fundamentals, the program structure and an example (Marmousi) are presented.