Onshore Newfoundland component

Acquisition parameters

     Contractor: Capilano Geophysical Ltd. 
     Recorded: 1989 
     Source: 4 Vibs, 14 s 8-56 Hz sweep, 8 sweeps/VP 
     Receivers: 14 Hz, 12 per group 
     Instrumentation: 240 channel DFS V 
     Recording: 18 s at 4 ms sample rate, SEGY on 9-track tape
     (except line 11 - recorded to 16 s) 
     Spread: 50 m station spacing, 100 m source spacing, 60-180 split, 60 fold

Processing

     Contractor: Western Geophysical Ltd. 
     Geometry: crooked line 
     Field statics: to 500 m, replacement velocity 5700 m/s 
     Automatic trace editing 
     Geometric spreading correction 
     Deconvolution: minimum phase 
     Residual statics: 2-11.5 s window, +/- 30 ms, using regional velocities for NMO
     correction 
     Velocity analysis 
     Surgical low-cut frequency filtering 
     AGC: 1000 ms 
     NMO correction 
     First break mute 
     Trim statics: 1-8 s window, +/- 12 ms 
     Stack 
     FX deconvolution 
     Trace mixing: 1:2:1 weighting 
     Time-variant bandpass filter 
     Time-variant scaling