Synopsis
		sfmutter < in.rsf > out.rsf offset=offset.rsf half=y nan=n tp=0.150 t0=0. v0=1.45 slope0=1./v0 slopep=slope0 x0=0. abs=y inner=n hyper=n

Data is smoothly weighted inside the mute zone.
The weight is zero for t < (x-x0) * slope0
The weight is one for t > tp + (x-x0) * slopep

The signs are reversed for inner=y.

July 2015 program of the month:
http://ahay.org/blog/2015/07/10/program-of-the-month-sfmutter/

Parameters
		bool abs=y [y/n] if y, use absolute value |x-x0|   bool half=y [y/n] if y, the second axis is half-offset instead of full offset   bool hyper=n [y/n] if y, do hyperbolic mute   bool inner=n [y/n] if y, do inner muter   bool nan=n [y/n] if y, put nans instead of zeros   string offset= auxiliary input file name   float slope0=1./v0 slope   float slopep=slope0 end slope   float t0=0. starting time   float tp=0.150 end time   float v0=1.45 velocity   float x0=0. starting space

Used In
		BEI          dpmv/krchdmo sg/denmark vela/vscan wvs/vscan   DATA          alaska/line31-81-m8r cant12/lpf cant12/stk freeusp/land nankai/data nankai/shots sigsbee/data2A sigsbee/fs2B sigsbee/nfs2B sigsbee/ptest sigsbee/pwemig sigsbee/wemig teapotdome/canoren   GALLERY          marmousi/recurkir sigsbee/ffd sigsbee/kirMulti sigsbee/model sigsbee/oway twohalf/kirMulti   GEE          mda/pefex   GEO384H          hw4/match   GEO384S          hw2/groundroll hw2/migration hw5/hradon hw5/pradon hw6/gazdag   GEO384W          hw2/cmp   JLU          apefsnsep/dune apefsnsep/simplegroll gvdseisint/bei vdseislet/demultiple vdseislet/haskell vdseislet/nmo vdseislet/usp   M8R          data/freeusp   MILANO          taupvel/cmp   RSF          reprobook/exam3 school/data school/fault school2012/demo school2012/ex school2016/radon school2016/synth school2017/seismic school2020/cmp school2020/seismic scons/rsf su/rsflab16 tutorial2017/radon tutorial2017/synth   SEP          cdstep/veltran fat/migration geostat/dix oc2/elfshot pefmult/haskell pefmult/mobil pwd/dune pwd/hector stack/velinv steer/wz25 vc2/beivc vc2/elfvc   SWAG          itime/oz2 itime/oz6   TCCS          acrossfault/synth anisodiff/simple anisodiff/simple3d butterfly/synth2D-1-timer butterfly/synth2D-2 butterfly/synth2D-3 butterfly/synth2D-4 dbortho/hyper dealiase2/bei dealiase2/hyper dealiase2/hypern deblend/fairfield-initmfnew deblend/linear deblend/synthcomplex deblend/synthhyper demulemd/haskell demulemd/mobil diffr/fault dtwaniso/synthetic-gather eikods/marm enhemd/prestack flat/flatelf halfthr/sean intshape/sean ltft/groll oc3/bei oc3/fault onestep/bpttirtm optapert/rightSigsbee optapert/sigsbee ortho/orthofair orthogroll/field ovc/nankai ovc/psovc pi/bei pmig/mig pmig/nmo probdif/nankai probdif/noisy-synthetic seislet/gath simistack/bei simistack/flat4 sparse/sparse-experim-shaping svmf/bei svmf/fairfield svscan/bei svscan/beicmps t2dweak/alaska uncert/beivc varipick/global-gom varipick/horizon varipick/newviking vscan/bei welllogs/logs wetm/nankaizone   UH          avostack/stack avostack/synh avostack/synl   XJTU          mcaseislet/sep2   ZJU          diffrlrra/fault diffrlrra/nankai_new diffrlrra/synth optnoise/prestack sosvmf/field