Interface: map_amp

 The map_amp function computes the transformation from n_tr_inp input traces into n_tr_out output traces. The transformation is defined by the five arrays map, amp, first_samp, last_samp, and max_freq.

The map array is indexed in the ouput time/depth sampling, and contains the corresponding time coordinates of the input trace. These input-time coordinates are normalized so to be in samples, and not physical units.

The amp array is indexed in the ouput time/depth sampling, and contains the amplitude scaling factor of the transformation.

The first_samp and last_samp arrays define the valid range of the transformation, as the first and last output samples.

The max_freq array is indexed in the ouput time/depth sampling, and contains the high cut-off frequency of the bandpass filter applied to the input trace. The maximum frequency must be expressed as fraction of the Nyquist frequency.

The shapes of the output arrays, and whether each input array is allocated and initialized, depend on the spatial mapping method that is used to apply the operator.

• Trace-to-trace
  • n_tr_inp=1
  • n_tr_out=1
  • max_freq: not allocated
  • inp_cent_coord: not allocated
  • inp_geom%reg: not allocated
  • inp_geom%irr: initialized by Genkir3D
  • out_geom%reg: not allocated
  • out_geom%irr: initialized by Genkir3D
• Gathering
  • n_tr_inp=n_tr_inp
  • n_tr_out=1
  • max_freq: allocated
  • inp_cent_coord: not allocated
  • inp_geom%reg: not allocated
  • inp_geom%irr: initialized by Genkir3D
  • out_geom%reg: not allocated
  • out_geom%irr: initialized by Genkir3D
• Spraying
  • n_tr_inp=1
  • n_tr_out=(2*nh_z1+1)*(2*nh_z2+1)
  • max_freq: allocated
  • inp_cent_coord=initialized by oper_domain
  • inp_geom%reg: not allocated
  • inp_geom%irr: initialized by Genkir3D
  • out_geom%reg: initialized by Genkir3D
  • out_geom%irr: initialized by oper_domain

Description Shape first_samp