There is no print function in STK, but 2 ways are available:
1) screen shot : it is the easiest and fastest way; for example with Gimp or KDE tools, it is verysimple to get a screen shot and save it in a file, or print it.
Postscript file: this way is under construction, but it works for the time frequency output, plotted in the main window.
How to create postscript file ?
The Environment Variable LOG_FILE must be defined (export LOG_FILE=./Log for example),
In the time-frequency menu click go to the export ->export ASCII menu: this will create 2 ASCII files in the directory pointed by LOG_DIR Env Var.: signal.txt and time_freq.txt;.
Then a small software is given in the ./Utilies/GMT_plot directory this program named “plot_time_freq”, write a script file (named “gmt_plot_time_freq.bash”) containing basic GMT functions (psxy, xyz2grd ...etc.); this script produces a postscript file in the LOG_FILE directory.
Nota: GMT (Generic Mapping Tool) is a very powerfull software, freely available at : http://gmt.soest.hawaii.edu
To sum up:
1) run the program /Utilies/GMT_plot/plot_time_freq
2 ) go in the directory ./Log to get the postscript file time_freq.ps (that you can save, move, rename, print, and plot with KDE, or ghostview )
Here is an example of postcript output :
Further more it is possible to change as your feeling, the color palette, title, .by editing the script gmt_plot_time_freq.bash.
a) In the main window, in the File menu, goto -> export to ASCII: thsi will write the current plotted channel in an ASCII file; in the directory pointed by LOG_DIR Var.Env.
b) In the menu PSD or FFT in Fourier menu, the spectra are written on the LOG_FILE when the button Export ASCII is clicked.
This file has a name in the form : psd_STA_Axis_ YEAR_MONTH_DAY_HH_MM_SS.txt (if you click on PSD menu),
or fft_STA_Axis_ YEAR_MONTH_DAY_HH_MM_SS.txt (if you click on FFT menu); it looks like this:
it is composed of 2 colums like this:
The first one is the frequency, and the second one is the PSD (Power Spectral Density) or the modulus of the FFT; the difference between theses is simply that the PSD is equal the modulus of the spectrum divided by the time windows duration. Since signals are generally in velocity, in µm/s,
the unit of PSD is : SQRT[(µm/s)**2 s**2 /s] = µm/ SQRT(s) = µm . SQRT(Hz)
And the unit of FFT modulus, is for a signal in velocity in µm/s: [(µm/s). s] = µm
This file is ALWAYS written in linear scale, on the full range of frequency (0 ->Nyquist)
This file can be easily plotted with MS-EXCEL, Open_Office, or xmrgace.
For the future, the polarisation menu will be written in ASCII, for having a trace of the results.