Andy Nowacki, University of Leeds [email protected]

A set of Fortran programs to compute vespagrams and f-k spectra for broadband seismic data in SAC format.

The computations are all done in the time domain, making these routines somewhat slow. They are recommended for educational purposes (and were written for that reason).

Required are:

• A Fortran compiler
• The Generic Mapping Tools for plotting
• The NetCDF library for writing files as NetCDF grid files
• FFTW

Optional dependency:

• SAC's XAPIIR filtering library (libxapiir)

To build, adjust the variables in Makefile, and the make.

If using the XAPIIR library for filtering, do make filt. This is recommended if you have SAC installed as the library is distributed with SAC.

The programs plot_fk.sh and plot_vesp.sh do stacking and create plots. Run these programs with the -h command line option to print out instructions.

They call the programs bin/stack_fk and bin/stack_vespa, which should be available in your $PATH. If you are current;y in the root directory of the repo, this can be done by

$ export PATH="$PATH:$PWD/bin:$PWD/script"

This software is distributed under the terms of the three-clause BSD licence:

Copyright (c) 2016-18, Andy Nowacki All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of the University of Leeds nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

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