'Marmousi model, spline intervals 200m * 400m' 0 1 1 / (Cartesian coordinates, velocities, loss factors) 0 3000 0 9200 -1 1 / (boundaries of the model) 0 surfaces 1 simple block: / 1 complex block: 1 / 'END of input data for smooth surfaces' / 'COMPLEX BLOCK' 1 'VP ' -1 (P wave slowness interpolated) 2 1 0 0 -1 / (i.e. VP=W(X2,X1), tension=0, velocity given) 24 16 (numbers of gridpoints) 0 400 800 1200 1600 2000 2400 2800 3200 3600 4000 4400 4800 5200 5600 6000 6400 6800 7200 7600 8000 8400 8800 9200 (X2 coordinates) 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 (X1 coordinates) 384*2500 'END of complex blocks, end of the input data for the model' /