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bool absoff=n [y/n] | y - h0x, h0y - are not in shot coordinate system
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float aper=hypotf(nx*dx,ny*dy) | aperture
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float dhx=dx | inline offset increment
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float dhy=dy | crossline offset increment
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float dsx=dx | inline shot increment
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float dsy=dy | crossline shot increment
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float dt=0.004 | time sampling
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float freq=0.2/dt | peak frequency for Ricker wavelet
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float h0x=0. | first inline offset
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float h0y=0. | first crossline offset
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string head= | source-receiver geometry (optional) (auxiliary input file name)
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int nhx=nx | number of inline offsets
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int nhy=ny | number of crossline offsets
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int nsx=nx | number of inline shots
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int nsy=ny | number of crossline shots
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float r0=1. | constant reflectivity
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string refl= | auxiliary input file name
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float s0x=x0 | first inline shot
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float s0y=y0 | first crossline shot
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string type= | type of velocity ('c': constant, 's': linear sloth, 'v': linear velocity)
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bool verb=y [y/n] | verbosity
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