This example shows how "inner" and "outer" mutes may be applied to moved-out data. The nmo velocity function also causes some weird looking data because the NMO time goes backwards.input data plot (see script below)
Notice that the ranges are from 182m to over 6000m. NMO created some weird affects on the long range traces with velocities: vtp 1495 4.85 1515 5.0 1555 5.167 2100 5.567 3500 6.567 end The NMO time actually decreased and the increased, causing some data to be mirrored.plot of mirrored data
SIOSEIS process NMO zeroes data when time decreases.data plot with nmo
The long ranges are normally muted at long ranges because of NMO stretch and low signal-to-noise ratio. e.g. mute xtp 2000 4.8 3000 5.2 6000 8. end enddata plot with nmo and outer mute data
Sometimes the traces close to the ship (small ranges) are noisy later in time. An inner (close to the ship) mute may be used. e.g. smute xtp 0 5.5 3000 9 end enddata plot with nmo and outer and inner mute data
sioseis << eof procs diskin nmo mute smute agc plot end diskin ipath line23.g.3116.3120 fno 3116 lno 3116 end end nmo vtp 1495 4.85 1515 5.0 1555 5.167 2100 5.567 3500 6.567 end end mute xtp 2000 4.8 3000 5.2 6000 8. end end smute xtp 0 5.5 3000 9 end end plot ann range taginc 5 srpath sunfil nibs 75 nsecs 5 vscale 2.5 def .05 trpin 10 end end agc winlen .5 end end end eof xloadimage -r 90 sunfil &Go to the list of seismic processes. Go to SIOSEIS introduction.