Synopsis
		sffft3 < in.rsf > out.rsf inv=n sym=n sign=inv? 1: 0 opt=y axis=2 pad=2

Input and output are complex data. The input is padded by factor pad.

July 2012 program of the month:
http://ahay.org/blog/2012/07/02/program-of-the-month-sffft3/

Parameters
		int axis=2 Axis to transform   bool inv=n [y/n] if y, perform inverse transform   bool opt=y [y/n] if y, determine optimal size for efficiency   int pad=2 padding factor   int sign=inv? 1: 0 transform sign (0 or 1)   bool sym=n [y/n] if y, apply symmetric scaling to make the FFT operator Hermitian

Used In
		BEI          ft1/brad ft1/ft2d ft1/plane4   CWP          geo2009TTIModeSeparation/tti3 pept2011MicroearthquakeMonitoring/saf1 pept2011MicroearthquakeMonitoring/saf3   DATA          alaska/line31-81-m8r nankai/data   GALLERY          bp/lowrank constant/lowrank french/lowrank gradient/lowrank marmousi/lowrank marmousi/model overthrust/lowrank overthrust/model segsalt/lowrank segsalt/model sigsbee/lowrank sigsbee/lrostep sigsbee/model twohalf/lowrank twohalf/lrostep twohalf/model vofz/lowrank   GEE          lsq/antoine   GEO384H          hw3/compress hw3/pocs hw5/seabeam   GEO384S          hw2/groundroll hw5/radon hw6/rtm   GEO384W          hw5/hyper   GEOSTATS          simulate/rfield simulate/simple spatial_stats/correlogram spatial_stats/covariance spatial_stats/gr_variogram spatial_stats/variogram   JLU          apefsnsep/simplegroll fspfint/cmp fspfint/curve fspfint/noise_qdome fspfint/qdome fspfint/sean gvdseisint/bei gvdseisint/ocmodel txyspfint/field3 txyspfint/french   PSU          ligo/test   RSF          rsf/sfderiv rsf/sfenvelope school/complex school/horizon school/single scons/rsfpy su/rsfdipfilt tutorials/lineaments tutorials/yilmaz1   SEP          fat/green fkamo/impresp fractal/random helft/mult helft/spike oc2/ocimp pyramid/pyramid texture/fft vc2/spec velspec/sigvc   TCCS          anisodiff/pcable atten/enerd butterfly/field2 butterfly/synth2D-1-timer butterfly/synth2D-2 butterfly/synth2D-3 butterfly/synth2D-4 cs/coef cs/sean cs/synth dbortho/hyper dealiase/coef dealiase/field dealiase/linear dealiase/synth dealiase/synth30Hz dealiase2/bei dealiase2/hyper dealiase2/hypern deblend/fairfield-initmfnew deblend/linear deblend/synthcomplex deblend/synthhyper dlaugment/exp dlchan/label dlchan/testing dlchan/thin dsd/conflict dsd/demo dsd/demo2 dsd/demo3.1perc elas/french-dc eseis/demo2 eseis/demo4 eseis/field eseis/sparse fraclapl/diffq fraclapl/marmq fraclapl/twolayer gmresq/bpgas group3/bptti group3/tiltorthocompare halfthr/hyper halfthr/linear halfthr/sean intshape/fsyn intshape/sean lfd/twod lowrank/aniso lowrank/bp lowrank/bptti lowrank/fowler lowrank/impres lowrank/threed ltft/groll nmo3/mcelroy oc3/bei oc3/fault oc3/french oc3/frenchint onestep/abc onestep/bptti onestep/bptti2 onestep/fio1d onestep/fowler onestep/grad onestep/grad2 onestep/tiltorth optapert/depthMig orthorhombic/orth orthorhombic/test orthorhombic/tiltn ovc/nankai ovc/psovc ovc/toy pi/barrolka pi/bei pi/simple-model probdif/nankai probdif/noisy-synthetic probdif/synthetic probdif/toy scan3/fourevents scan3/noncwavg-1 scan3/realdata seislet/lena seislet/sin2 sglowrank/avo sglowrank/bp3 sglowrank/tlayer3 sparse/sparse-experim-shaping svmf/fairfield svmf/test svmf/testnoise synth/ordexample20hz t2dweak/alaska vc3/fracs vc3/threedim wetm/beivel wetm/nankaizone wetm/synthetic4   XJTU          mcaseislet/sep2   ZJU          odrr3d/hyp3d odrr3d/hyp3d_N20 odrr3d/syn3d odrr3d/syn3d_N6 odrr3d/syn3d_hf