NAME

Wavelet - wavelet generation


SYNOPSIS

Wavelet parameters [ < in.H ] > out.H


DESCRIPTION

Wavelet generation program usually used for modeling programs


INPUT PARAMETERS

nt,n1 - integer
dimension of time axis parameter n1wavelet = n1out also output to header

nx,n2 -integer
[1] number of input traces to use (see wavelet=data)

np,n3 -integer
[1] number of input planes to use (see wavelet=data)

dt -real
[.004] sample rate (parameter d1wavelet = d1out also output to header)

domain -char*
[time] domain option: time,ctime,frequency,spectrum time = nt real values representing the wavelet ctime = nt complex values representing the wavelet frequency = nt/2+1 complex values representing frequency domain wavelet spectrum = nt+2 real values, first half are normalized spectrum, second half are normalized phase angle which is the phase angle divided by pi. Usually used for quick check plots. (parameter domainwavelet = domain also output to header)

wavelet -char*
[spike] type of wavelet spike = spike in time domain equals white spectrum bandpass= butterworth bandpass filter, sharpness of frequency cutoffs is controlled by the order ricker0 = gaussian curve ricker1 = first derivative of gaussian curve ricker2 = second derivative of gaussian curve data = amplitude spectrum is average of nx*np input traces from the in file zero = null wavelet (ie: all zeroes)

phase -char*
[none] phase options: none,minimum,degrees none = no modification of phase minimum = minimum phase min2zero = minimum to zero phase conversion degrees = numerical value representing degrees of constant phase shift from specified wavelet

fund -real
[40] fundamental frequency of ricker wavelet (actually relates to gaussian half-width) =item flow -real

[10] low cutoff frequency of butterworth filter

fhigh -real
[60] high cutoff frequency of butterworth filter

order-integer
[1] order of butterworth filter (1 is average sharpness, > 1 is sharper, < 1 is smoother) (sets both high and low frequency cutoffs)

orderlow-integer
[1] low cut order of butterworth filter (overrides order)

orderhigh-integer
[1] high cut order of butterworth filter (overrides order)

tdelay - real
additional time delay

bell -real
[nt/4*dt] bell window half width, < dt/2 for no bell window

boxcar -integer
[pnt*dt] boxcar window width


CATEGORY

seis/model