Commit 1e7a37d1 authored by thomas.forbriger's avatar thomas.forbriger
Browse files

gresy [WP]: provide new options for Fourier domain filters

parent 6abbd1d9
......@@ -2,6 +2,7 @@ c this is <gresy.f>
c Copyright 1997, 2010 by Thomas Forbriger (IfG Stuttgart)
c Copyright 2019 by Thomas Forbriger (BFO, KIT)
c calculate seismograms from a greens function matrix file
......@@ -57,12 +58,13 @@ c 29/11/2011 V1.18 implemented radial component line source
c both new cases successfully tested against refmet
c notice: refmet is not yet tested against a
c reference
c 11/12/2019 V1.19 support Fourier domain filters
program gresy
character*79 version
parameter(version='GRESY V1.18 GREens function SYnthetics')
parameter(version='GRESY V1.19 GREens function SYnthetics')
c dimensions
integer maxtr, maxsamp, maxom, maxu
parameter(maxu=10000, maxtr=maxu, maxom=4100, maxsamp=maxom*2)
......@@ -105,14 +107,18 @@ c seismogram trace to sff file
real dt
c commandline
integer maxopt, lastarg, iargc
character*3 optid(maxopt)
character*4 optid(maxopt)
character*80 optarg(maxopt)
logical optset(maxopt), opthasarg(maxopt)
c options
logical debug, optlambda, optnew, optresponse, hankel1, hankel2
logical suppress, radial, verbose, linesource, usemaster
real lambdalim, tapfrac
c low- and high-pass frequency, time shifts (source, origin)
real lpbf,hpbf,tshiftsrc,tshiftorigin
c oredr of low- and high-pass
integer lpbo, hpbo
character*80 respfile, fileformat
c taper
real tf_costap
......@@ -135,11 +141,12 @@ c functions
double precision tf_dj1, tf_dy1
c here are the keys to our commandline options
data optid/'-D','-l','-o','-t','-r','-S','-1','-2','-R','-v',
& '-L','-ty','-dt', '-N', '-m'/
& '-L','-ty','-dt', '-N', '-m', '-lpb', '-hpb',
& '-tss', '-tso'/
data opthasarg/.FALSE.,.TRUE.,.FALSE.,2*.TRUE.,6*.FALSE.,
& 3*.true.,.false./
& 3*.true.,.false.,4*.true./
data optarg/'-','1.','-','10.','junk',6*'-','sff',
& '1.e-18','1000000','-'/
& '1.e-18','1000000','-',2*'1.,0',2*'0.'/
c read commandline
......@@ -149,6 +156,7 @@ c
print *,' [-m] [-l lambda] [-o]'
print *,' [-t frac] [-r respfile] [-S] [-1] [-2] [-R]'
print *,' [-v] [-d] [-L] [-ty f] [-dt dt] [-N n]'
print *,' [-lpb f,o] [-hpb f,o] [-tss t] [-tso t]'
print *,'or gresy -help'
print *,'or gresy -xhelp'
call tf_seitosh_reference
......@@ -207,6 +215,20 @@ c
print *,'-L simulate seismograms from line source (2D)'
print *,'-R calculate radial component'
print *,' '
print *,'Fourier domain filter'
print *,' '
print *,'-lpb f,o apply a Butterworth low-pass'
print *,'-hpb f,o apply a Butterworth high-pass'
print *,' f: eigenfrequency of filter (in Hz)'
print *,' o: order of filter'
print *,' '
print *,'-tss t shift source time function by t (in s)'
print *,' t>0: onset is delayed'
print *,' source time in data file is not affected'
print *,'-tso t shift origin time by t (in s)'
print *,' t<0: first sample is before source time'
print *,' header data of traces will be adjusted'
print *,' '
print *,'Definition of the Fourier transformation:'
print *,'The Fourier transformation used in this program and in'
print *,'related programs (like gremlin, syg, and greda) is'
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