Introduction

The purpose of this exercise is to cmpare modal superposition and wavenumber integration synthetics



1. For the velocity model that you used before,


    H Vp Vs Density Qp Qs Etap Etas FrefP FrefS
    -4 1 0 1.0 0 0 0 0 1 1
      2 2 0 1.5 0 0 0 0 1 1


    4.0 0.05 256 0.0 0.0

sprep96 -M my.mod -HS -1.0 -HR -1.5 -ALL  -d dfile -R -NMOD 100
sdisp96
sregn96
spulse96 -V -p -l 1 -d dfile -2 > file96

Perform these computations in different directories, so that you can overlay the sac files, e.g.,

If I due the hspec96 computations in TESTH and the disp96 computations in TESTS, then
from the directory about

gsac
GSAC> r TEST[SH]/B00109ZEX.sac
GSAC> fileid name
GSAC> color rainbow
GSAC> bg plt
GSAC> p overlay on
GSAC> plotnps -F7 -W10 -EPS -K < P001.PLT > P001.eps
GSAC> convert -trim P001.eps P001.png

will give




You will see that there is a good comparison.

In the TESTS directory plot up the dispersion

sdpegn96 -C -R
plotxvig < SREGNC.PLT

You can plot the group velocities using the command

sdpegn96 -U -C
plotxvig < SREGNU.PLT

          spulse96 -V -p -l 1 -d dfile -2 -FUND | fplot96