Editing Seismic task-centric program list (section)

=Migration=

Below, "v(x,z)" means "works when the velocity has lateral velocity variations, and will try to do something about them". This corresponds to what is widely called depth migration, but possibly to "smart" time migrations as well. The "const. v" term will be applied to algorithms that can only deal with constant velocity, regardless of whether the output is in depth or time. The "v(z)" term describes all other migrations. Note that the above terms apply even to migrations that do not need a velocity model!

It is assumed that a 3-D prestack algorithm will be able to migrate a 2-D prestack or a 3-D poststack, that a v(x,z) will be able to deal with a constant-velocity case, and so on. Exceptions to these rules will be highlighted.

The term "survey-sinking" was preferred to "source-receiver" because it can be done in either midpoint-offset, or in source-receiver coordinates, and the two differ in their treatment of amplitudes (a CMP gather is not a wavefield).

==3-D, prestack, wide-azimuth, v(x,z)==
*Survey-sinking scheme in midpoint-offset coordinates with extended split-step extrapolator: [http://reproducibility.org/RSF/sfsrmig.html srmig], [http://reproducibility.org/RSF/sfsrmig2.html srmig2]

==3-D, prestack, common-azimuth, v(x,z)==
*Extended split-step extrapolator: [http://reproducibility.org/RSF/sfcamig.html camig]

==3-D, prestack, one-azimuth, const. v==
The "one-azimuth" term was employed to underline that they take as input 3-D data with a single offset dimension, but they do not employ the common-azimuth approximation<ref>Biondi, B., and Palacharla, G.: 3-D prestack migration of common-azimuth data, Geophysics, v. 61, pp. 1822-1832.</ref> when computing ky.
*F-K scheme: [http://reproducibility.org/RSF/sfprestolt.html prestolt]
*Kirchhoff scheme: [http://reproducibility.org/RSF/sfpreconstkirch.html preconstkirch]

==3-D, poststack, v(x,z)==
*Extended split-step extrapolator: [http://reproducibility.org/RSF/sfsstep2.html sstep2], [http://reproducibility.org/RSF/sfzomig.html zomig]

==3-D, poststack, const. v==
*F-K scheme: [http://reproducibility.org/RSF/sfstolt.html stolt], with impulse response examples in <tt>sep/forwd</tt>
*Kirchhoff with antialiasing: [http://reproducibility.org/RSF/sfmig3.html mig3], [http://reproducibility.org/RSF/sfmigsteep3.html migsteep3]

==2-D, prestack, v(x,z)==
*Survey-sinking scheme in midpoint-offset coordinates with PSPI extrapolator: [http://reproducibility.org/RSF/sfdsr.html dsr]
*Survey-sinking scheme in midpoint-offset coordinates with split-step extrapolator: [http://reproducibility.org/RSF/sfdsr2.html dsr2]
*Shot-profile scheme, Riemannian extrapolator: [http://reproducibility.org/RSF/sfrwe2d.html rwe2d], [http://reproducibility.org/RSF/sfrwesrmig.html rwesrmig]

==2-D, prestack, v(z)==
*Slope-based migration: [http://reproducibility.org/RSF/sfpmig.html pmig]

==2-D, prestack, const. v==
*Angle-gather migration: [http://reproducibility.org/RSF/sfagmig.html agmig]

==2-D, poststack, v(x,z)==
*Implicit finite-difference extrapolator, 15 and 45 degree approximations: [http://reproducibility.org/RSF/sfmig45.html mig45]
*Riemannian extrapolator: [http://reproducibility.org/RSF/sfrwezomig.html rwezomig]

==2-D, poststack, v(z)==
*Phase-shift extrapolator: [http://reproducibility.org/RSF/sfgazdag.html gazdag]
*Kirchhoff with antialiasing: [http://reproducibility.org/RSF/sfkirchnew.html kirchnew]
*Least-squares Kirchhoff with antialiasing: [http://reproducibility.org/RSF/sfkirchinv.html kirchinv]

==2-D, poststack, const. v==
*Implicit finite-difference extrapolator: [http://reproducibility.org/RSF/sfconstfdmig2.html constfdmig2]

==Migration without a velocity model==
*Slope-based 2-D prestack migration, works in v(z) media: [http://reproducibility.org/RSF/sfpmig.html pmig]

==Least-squares migration==
*Kirchhoff, 2-D, post-stack, v(z), with antialiasing: [http://reproducibility.org/RSF/sfkirchinv.html kirchinv]