Synopsis
		sfsmooth < in.rsf > out.rsf repeat=1 rect#=(1,1,...) diff#=(n,n,...)

Parameters
		bool diff#=(n,n,...) [y/n] differentiation on #-th axis   int rect#=(1,1,...) smoothing radius on #-th axis   int repeat=1 repeat filtering several times

Used In
		BEI          dpmv/yalei dpmv/matt dwnc/sigmoid dwnc/vofz fdm/kjartjac fld/synmarine ft1/plane4 ft1/ft2d ft1/autocor krch/sep73 sg/denmark   CWP          geo2006TimeShiftImagingCondition/zicig geo2007StereographicImagingCondition/sigsbee2 geo2007StereographicImagingCondition/gaus1 geo2007StereographicImagingCondition/flat4 geo2008InterferometricImagingCondition/sact1 geo2008IsotropicAngleDomainElasticRTM/marm2oneA geo2008IsotropicAngleDomainElasticRTM/marm2allA geo2008NumericWEMVAoperators/saltWEMVA geo2008NumericWEMVAoperators/flatWEMVA geo2009VTIModeSeparation/separate3 jse2006RWEImagingOverturningReflections/sigsbee   GEE          hlx/mam lmn/sep73 lsq/antoine pch/signoi   GEO384W          hw1/wave hw5/hyper   GEO391          hw3/rotate hw3/pocs hw5/channel   GPGN658          rtmig/exercise   JSG          avo/avo flat/comaz flat/flat flat/flatelf lpf/regr nmo3/azimuthtest pmig/mig seislet/seis shape/smoo shape/lomo strfilter/spray   RSF          rsf/unif3 school/single school/local school/sigsbee school/complex school/marm school/channel   SEP          antial/sig findif/vc3 huygens/marmousi lineiko/test mett/mtime plane/qint pwd/dune pwd/lomo pwd/signoi spitz/sign stack/miginv stoltst/imps stoltst/elfst vc2/spec vc2/sigvc vc2/vcmod velspec/sigvc