NOTICE!!! THIS PROGRAM COMES WITH NO WARRANTY!!!

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I RECOMMEND THAT SOMEONE USE "F-K beamforming" in fk-bf INSTEAD OF THIS ONE.

The new beamforming package can be found at https://github.com/geophydog/Beamforming_in_frequency_domain

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Beam-forming

• To constrain the back-azimuth and slowness of some seismic phase with seismic array

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Example

• This is an example and necessary files in the diretory "Example"

beamforming listfile 630 700 0.01 0.5 2 8 0.2 3 out.txt

Dependencies

• Linux or Mac OS platform;
• SAC(Seismic Analysis Code, here version 101.6a)
  • SAC is used to do bandpass filtering;
  • Request for SAC
• GMT(the Generic Mapping Tools, here version 5.3.1)
  • GMT is used to plot the results after executing beam-forming.
  • Download GMT

Installation

• Just run "make" to compile and get the executable command "beamforming" in "src" source code directory .

Usage

beamforming sacfile.lst t1 t2 fre_low fre_high slow_low slow_high slow_step baz_step  output_file 

parameter	mean
sacfile.lst	file containing names of SAC format files
t1	begin time of doing beam-forming
t2	end time of doing beam-forming
fre_low	low limitation of corner frequency of SAC files
fre_high	high limitation of corner frequency of SAC files
slow_low	low limitation of scanning horizontal slowness or ray parameter
slow_high	high limitation of scanning horizontal slowness or ray parameter
slow_step	step length of scanning horizontal slowness or ray parameter
baz_step	step length of scanning back-azimuth
output_file	file name of outputting results

NOTICE!!!

• Unit of slowness: second/degree;
• Unit of back-azimuth: degree.

Contribution

• Author: Xuping Feng
• Email: geophydogvon@gmail.com