Synopsis
		sfadjgradient2d_coupled < Fvel1.rsf xig1=Fxig1.rsf us1=Fus1.rsf ur1=Fur1.rsf > Fgr1.rsf vel2=Fvel2.rsf xig2=Fxig2.rsf us2=Fus2.rsf ur2=Fur2.rsf gr2=Fgr2.rsf nxtap=40 verbose=n

Parameters
		file gr2= auxiliary output file name   int nxtap=40 TAPER size   file ur1= auxiliary input file name   file ur2= auxiliary input file name   file us1= auxiliary input file name   file us2= auxiliary input file name   file vel2= auxiliary input file name   bool verbose=n [y/n] VERBOSITY flag   file xig1= auxiliary input file name   file xig2= auxiliary input file name