Synopsis
		sftime2depthweak < in.rsf dvdx0=dveldx0.rsf dvdt0=dveldt0.rsf refvelocity=refvelocity.rsf outdt0=outdeltime.rsf outdx0=outdeldist.rsf outdv=outdelv.rsf zsubsample=100 nderiv=10 refderiv=1. smoothlen=nx/20 nsmooth=10

Parameters
		file dvdt0= auxiliary input file name   file dvdx0= auxiliary input file name   int nderiv=10 Derivative filter order   int nsmooth=10 Smoothing repeat   file outdt0= auxiliary output file name   file outdv= auxiliary output file name   file outdx0= auxiliary output file name   float refderiv=1. Deriveative filter reference (0.5 < ref <= 1)   file refvelocity= auxiliary input file name   int smoothlen=nx/20 Smoothing filter length   int zsubsample=100 Additional subsampling in depth for stability

Used In
		TCCS          probdif/nankai t2dweak/alaska t2dweak/field t2dweak/grad t2dweak/slow varipick/newviking wetm/beivel wetm/nankaizone