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Description
Normal Moveout Correction
This procedure applies normal move out corrections for seismic traces. Seismograms before stacking with non-zero offset, became to seismograms before stacking with zero offset according to Dix formula below. This formula is used by the NMO program:
∆t=sqrt(t 0 2+offset 2/V 2 nmo)-t 0
There is also an option to take the topography into consideration during the velocity input. In this case the formula will be as following:
∆t=(1/2sqrt(t 0 2+offset 2/V 2 nmo)-datum source-datum bin/V 0)+(1/2sqrt(t 0 2+offset 2/V 2 nmo)-datum receiver-datum bin/V 0)
Parameters
NMO direction
Velocity implementation method to seismic traces:
•Forward– apply NMO (apply normal moveout correction in seismic traces)
•Reverse – remove NMO correction
Stretching parameters
Muting parameters "stretching"
Stretch factor
Factor for muting area definition
Smoothing parameter Y velocity
Parameter of velocity smooth for muting
Surface velocity V0
Velocity of near surface
Shift data
Shift to/from constant datum
By default FALSE.
Datum
Provide the datum value.
Advanced
Ignore checking input data
By default FALSE
Subsequence sorting free mode
By default FALSE
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