SUVELAN_UCCS - compute stacking VELocity panel for cdp gathers
using UnNormalized CrossCorrelation Sum
suvelan_uccs stdout [optional parameters]
Optional Parameters:
nx=tr.cdpt number of traces in cdp
nv=50 number of velocities
dv=50.0 velocity sampling interval
fv=1500.0 first velocity
smute=1.5 samples with NMO stretch exceeding smute are zeroed
dtratio=5 ratio of output to input time sampling intervals
nsmooth=dtratio*2+1 length of smoothing window
verbose=0 =1 for diagnostic print on stderr
pwr=1.0 semblance value to the power
Notes:
Unnormalized crosscorrelation sum: sum all possible crosscorrelation trace
pairs in a CMP gather for each trial velocity and zero-offset two-way
travel time inside a time window. This unnormalized coherency measure
produces large spectral amplitudes for strong reflections and small
spectral amplitudes for weaker ones. If M is the number of traces in the
CMP gather M(M-1)/2 is the total number of crosscorrelations for each trial
velocity and zero-offset two-way traveltime.
Credits: CWP: Valmore Celis, Sept 2002
Based on the original code: suvelan.c
Colorado School of Mines: Dave Hale c. 1989
Reference: Neidell, N.S., and Taner, M.T., 1971, Semblance and other
coherency measures for multichannel data: Geophysics, 36, 498-509.
Trace header fields accessed: ns, dt, delrt, offset, cdp
Trace header fields modified: ns, dt, offset, cdp