File

>> Open File with GSE Calibration

This option allows you to load, display and further process calibration information ( poles, zeros, and scale factors  for seismometer systems) provided  in PAZ-GSE format. Here you will find 'calibration files' for particular problems from  'Of Poles and Zeros' (e. g. pr10_1.cal corresponds to Problem 10.1, etc.)  but also calibration files for standard instruments (e. g. woodande.cal corresponds to a Wood-Anderson seismometer).
 Depending on your mode of operation (WWW or CD), the files will either be loaded from the Web server or the CD. For a description of the GSE  format see 'Of Poles and Zeros'.

Once a calibration file is loaded, the pole and zero positions  can be manually modified using Modify and Enter or they can be displayed in  map-view using the Map option from the menu Poles/Zeros. It can further be used to display the corresponding frequency reponse function (see Show Response) or to filter another trace (see Filter with Response from Poles/Zeros  in the Utilities menu).

>> Open file with Data Trace

Several exercises within 'Of Poles and Zeros' require digital seismogram data.  Using the current option, these data can be loaded for display (see General hints for the zoom option) and further processing  either from  the Web server or the CD (depending on your mode of operation). Data traces  are separated into folders. Select a folder to see the list of available data files in it. After selecting one of the files and pressing the Apply button or Ok button the data file will be loaded. Loading the file may be slow. Further processing can be done with the tools from the Utilities menus.

>> Reset

The existing calibration values (poles, zeros and scale factor) as well as  fit response values are deleted. The Setup values are set to their default values and the drawing area is wiped clean.

>> Print

Here you obtain  instructions for printing under Sun Solaris, Linux and Windows.

>> New Window

You will get a new DST frame. New DST frames are subsequently numbered in their title bars.

>> Save  Image in new Window

Sometimes you might want to save an image which you obtain during processing just for documentation (as sort of a hardcopy on screen). The Save image in new Window option allows you to do that  in a separate window which you can label accoring to your needs. You will be prompted for the  label once you sleceted this option. Note that the new window appears without menu bar.

>> Exit

Exit the DST.
If you opened  DST  windows using the New Window option you can close all 'new' windows while exiting the initial one. Exiting one of the other windows will only close that one.