OCTAVE saswv

This program was developed to read a text file with a measured cross power spectrum. It was used in a Benchmark Test sponsored by the Geo-Institute of the American Society of Civil Engineers (ASCE). The format of the text file is shown by the following first few lines of one instance:
dX = 32   
R1= 45 R2 = 77 S = -7 T-Rex Shaker
  forward 
f (Hz) |Gxy| (volts) Ph (Gxy) (deg) Coherence
   
5 0 -66.75 1
5.5 0.01 -74.25 1
6 0.01 -77.12 1
6.5 0.01 -79.08 1
7 0.01 -88.2 1
7.5 0.02 -103.03 1
8 0.02 -111.59 1
.
.
.

To run the program, start octave and type
     saswv
     
1). Enter the text file with the cross spectrum
2). Select a range of frequencies to plot

Details on the data set are found in Michaels (2014).

Figure 22: saswv: Cross power spectrum from data Michaels (2014).
\includegraphics[scale=0.6]{Figure23.pdf}

Figure 23: saswv: Dispersion computed from data Michaels (2014).
\includegraphics[scale=0.6]{Figure24.pdf}