Wavelet - wavelet generation
Wavelet parameters [ < in.H ] > out.H
Wavelet generation program usually used for modeling programs
- 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
seis/model