Programs of the Month

Randomly-selected Madagascar programs get featured every month on the Madagascar blog. This page provides a summary list with links.

2019

June

sfzomig3

3-D zero-offset modeling/migration with extended SSF.

2017

April

sfseislet

Seislet transform.

2016

March	sflinear	1-D linear interpolation.
February	sfmig2	2-D prestack Kirchhoff time migration with antialiasing.
January	sfsort	Sort a float/complex vector by absolute values.

2015

December	sfdivn	Smooth division.
November	sfpldb and sfplas	Convert Vplot to ASCII; convert ASCII to Vplot
October	sfisolr2	Lowrank decomposition for 2-D isotropic wave propagation.
September	sfsimilarity	Local similarity measure between two datasets.
July	sfmutter	Muting.
June	sfintbin	Data binning by trace sorting.
May	sfbox	Draw a balloon-style label.
April	sfslant	Time-space-domain Radon transform (slant stack).
March	sfgrey	Generate raster plot.
February	sfhistogram	Compute a histogram of integer- or float-valued input data.
January	sfmf	1D median filtering.

2014

December	sfbin	Data binning in 2-D slices.
November	sfthreshold	Soft thresholding.
October	sfsigmoid	2-D synthetic model from J.F.Claerbout.
September	sfmax1	Picking local maxima on the first axis.
August	sfstolt	Post-stack Stolt modeling/migration.
July	sfltft	Local time-frequency transform (LTFT).
June	sfeikonal	Fast marching eikonal solver (3-D).
May	sfhelicon	Multidimensional convolution and deconvolution by helix transform.
April	sfcostaper	Cosine taper around the borders (N-D).
March	sflpad	Pad and interleave traces.
February	sfdipfilter	Filter data based on dip in 2-D or 3-D.
January	sfinttest1	Interpolation from a regular grid in 1-D.

2013

December	sfcausint	Causal integration on the first axis.
November	sfremap1	1-D ENO interpolation.
October	sfunif2	Generate 2-D layered velocity model from specified interfaces.
September	sfpatch	Patching (N-dimensional).
August	sfai2refl	Convert acoustic impedance to reflectivity.
July	sftime2depth	Time-to-depth conversion in V(z).
June	sfwiggle	Plot data with wiggly traces.
May	sfvscan	Velocity analysis.
April	sfnmo	Normal moveout.
March	sfpow	Apply power gain.
February	sfpwd	3-D plane wave destruction.
January	sfricker1	Convolution with a Ricker wavelet.

2012

December	sfhalfint	Half-order integration or differentiation.
November	sfbandpass	Bandpass filtering.
October	sfkirmod	Kirchhoff 2-D/2.5-D modeling with analytical Green's functions.
September	sfiwarp	Inverse 1-D warping.
August	sfpick	Automatic picking from semblance-like panels.
July	sffft3	FFT transform on extra axis.
June	sfdip	3-D dip estimation by plane wave destruction.
May	sfderiv	First derivative with a maximally linear FIR differentiator.
April	sfgrey3	Generate 3-D cube plot.
March	sfspectra	Frequency spectra.
January	sfsmooth	Multi-dimensional triangle smoothing.

2011

December	sfcontour	Contour plot.
November	sfenvelope	Compute data envelope or phase rotation.
October	sfagc	Automatic gain control.
September	sfclip	Clip the data.
August	sfgraph	Graph plot.
July	sfnoise	Add random noise to the data.