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float aper=SF_HUGE | \tMaximum aperture in x and y directions from current point (default - up to model boundaries)
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float df=0.1 | \t< Maximum distance to travel per step (fraction of the cell size) >
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float dt=0.001 | \tTime sampling
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float md=SF_HUGE | \tMaximum distance for a ray to travel (default - up to model boundaries)
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int na=360 | \tNumber of azimuth phase angles
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int nb=180 | \tNumber of inclination phase angles
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int nc=0 | \tNumber of threads to use for ray tracing (OMP_NUM_THREADS by default)
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int nt=1001 | \tNumber of time samples for each trajectory
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bool parab=y [y/n] | \ty - use parabolic approximation of trajectories, n - straight line
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string traj= | \tTrajectory output (auxiliary output file name)
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bool verb=n [y/n] | \tverbosity flag
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string vspl= | \tSpline coefficients for velocity model (auxiliary input file name)
\n | \n \n |