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SSS is primarily a package for doing signal stacking
(i.e. summation or beamforming). Each signal (i.e. SAC file) has properties
such as a static delay, epicentral distance, weighting factor, and polarity
associated with it. The dynamic delays can be calculated using a normal moveout
or refracted wave velocity model. Certain delay properties can be automatically
incremented between summations. Files are easily added to or removed from the
stack file list. The time window for the stack is easily adjusted. Files which
do not contain data throughout the stack time window are filled with zeros.
The stack file list can be plotted with or without the summation. Each summation
can be saved on disk for later use. A record section plot is also included in
this subprocess.
This is a SAC subprocess. A subprocess is like a small program within the main SAC program. You start a subprocess by typing its name (SSS in this case.) You can terminate it and return to the main program using the quitsub command. You can also terminate SAC from within a subprocess using the QUIT command. While within a subprocess, you can execute any command belonging to that subprocess plus a limited number of main SAC commands. A list of the allowed main SAC commands is included in this document.
The remainder of this manual contains the documentation on each of the SSS
commands. They are in alphabetical order and are also summarized below.
The format and notation is the same as the SAC Command Reference Manual. A list
of the allowed main SAC commands is also shown below. You can also use all of
the SAC macro features in this subprocess.
| ADDSTACK | Add a new file to the stack file list. |
| CHANGESTACK | Change properties of files currently in the stack file list. |
| DELETESTACK | Deletes one or more files from the stack file list. |
| DELTACHECK | Change the sampling rate checking option. |
| DISTANCEAXIS | Define the record section plot distance axis parameters. |
| DISTANCEWINDOW | Controls distance window properties on subsequent record section plots. |
| GLOBALSTACK | Sets global stack properties |
| INCREMENTSTACK | Increments properties for files in the stack file list. |
| LISTSTACK | Lists the properties of the files in the stack file list. |
| PLOTRECORDSECTION | Plots a record section of the files in the stack file list. |
| PLOTSTACK | Plots the files in the stack file list. |
| QUITSUB | Terminates the Signal Stacking Subprocess. |
| SUMSTACK | Sums the files in the stack file list. |
| TIMEAXIS | Controls the time axis properties on subsequent record section plots. |
| TIMEWINDOW | Sets the time window limits for subsequent stack summation. |
| TRAVELTIME | Computes travel-time curves for pre-defined models or reads travel-time curves from ascii text files. |
| VELOCITYMODEL | Sets stack velocity model parameters for computing dynamic delays. |
| VELOCITYROSET | Controls placement of a velocity roset on subsequent record section plots. |
| WRITESTACK | Writes a stack summation to disk. |
| ZEROSTACK | Zeros or reinitializes the signal stack. |
This is a list of the allowed main SAC commands. Their abbreviated names are
also allowed.
| AXES | BEGINDEVICES | BEGINFRAME | BEGINWINDOW | BORDER | COLOR |
| COMCOR | COPYHDR | DATAGEN | ECHO | ENDDEVICES | ENDFRAME |
| ERASE | EVALUATE | FLOOR | GETBB | GRID | GTEXT |
| HELP | INSTALLMACRO | LISTHDR | LINE | LINLIN | LINLOG |
| LOGLAB | LOGLIN | LOGLOG | MACRO | MESSAGE | PAUSE |
| PLABEL | PLOTC | QDP | QUIT | READBBF | REPORT |
| SETBB | SETDATADIR | SETDEVICE | SETMACRO | SGF | SYMBOL |
| SYNTAX | SYSTEMCOMMAND | TICKS | TITLE | TSIZE | VSPACE |
| WAIT | WINDOW | WRITEBBF | XDIV | XFUDGE | XFULL |
| XGRID | XLABEL | XLIM | XLIN | XLOG | XVPORT |
| YDIV | YFUDGE | YFULL | YGRID | YLABEL | YLIM |
| YLIN | YLOG | YVPORT | |||
If you have technical questions about this page, contact:
peterg@llnl.gov -- Peter GoldsteinThis page maintained by:
peterg@llnl.gov -- Peter Goldstein
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8/12/98
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