| | \n\n \n \n \n float dr=dx | \treceiver increment \n | \n \n\n \n \n \n bool lsint=n [y/n] | \tif use least-squares interpolation \n | \n \n\n \n \n \n int nr=1 | \tnumber of recievers \n | \n \n\n \n \n \n int nt=nx*nz | \tMaximum number of time steps \n | \n \n\n \n \n \n int order=4 | \tInterpolation order \n | \n \n\n \n \n \n float r0=x0 | \tfirst receiver \n | \n \n\n \n \n \n string shotfile= | \tfile with shot locations (auxiliary input file name) \n | \n \n\n \n \n \n float tol=0.01 | \tShooting tolerance (in degrees) \n | \n \n\n \n \n \n bool vel=y [y/n] | \tIf y, the input is velocity; if n, slowness \n | \n \n |