JRG - Seismic Processing on Any Computer

JRG - Seismic Processing on Any Computer, Open-Source Software

John N. Louie, louie@seismo.unr.edu
Nevada Seismological Laboratory at the University of Nevada, Reno
9 September 2012

Description

The Resource Geology Seismic Processing System for Java (JRG) is a basic reflection processing package with superb graphics, 3-d and crooked-line capabilities, SEG-Y and sound file I/O, and a friendly GUI that runs on any machine. It lacks muting, decon, or migrations.

Download the latest compiled class archive (311 kb .jar). They are double-clickable:
- jrg500.jar will run on any machine with at least 1 Gb of physical RAM;
- jrg2G.jar will load large prestack data sets, if you have at least 4 Gb of physical RAM;
- Use jrg.jar on those older machines with little RAM.
JRG home
Download JRG source (205 kb .jar).
Run JRG with the command ``java -cp jrg.jar Viewmat'' in a Command Prompt or Terminal window.
Class exercises using JRG:
- Refraction (also a tutorial at the senior undergrad level);
- Reflection;
- Complex numbers (also a tutorial at the graduate level);
- Z-plane filtering;
- 2-d FFT;
- Wave propagation.
Sound and image output examples.

Referencing

A citation is always appreciated if you should publish a plot made by JRG. In your figure caption or acknowledgments, you can add ``Seismic processing and plotting with the JRG package of Louie from crack.seismo.unr.edu/jrg .''

JRG is partly an adaptation of the UNIX command-line-based Resource Geology Seismic Processing System.

Copyright: License Granted for Free Use of Open Source

License is hereby granted for anyone to make any use of this software and its associated source and compiled binary codes, including free re-distribution, and incorporation into commercial products, provided this copyright notice is retained within all files, versions, and distribution media substantially incorporating John Louie's original work.

Other Software Needed

JRG was developed consistent with the Sun Java Development Kit (JDK) version 1.1.3, and has been tested to run similarly on the Java 1 and Java 2 Platforms and Runtime Environments (JREs) implemented for Solaris 2.5, 2.7, 2.8, 2.9, & 2.10; Windows95, 98, 2000, XP, Vista, & 7; and MacOS 8.1, 8.6, 9.1, 9.2, 10.1, 10.2, 10.3, 10.4, 10.5, 10.6, & 10.7.

The JRE and JDK can be found for any platform through java.com/download and java.sun.com. They are free.

What's New:

Version	Date	Comments
3.8.3	9 August 2012	Added a new contoured BROY color table.
3.8.2	13 September 2011	Added new moving-window operators to `smooth`: Standard Deviation of Average; and RMS. Fixes to Average.
3.8.1	2 May 2011	Fixed the inability of the `SACieeetoShake` command-line to translate 3d point-source synthetic seismograms. Run ```java -cp jrg.jar SACieeetoShake`''.
3.7.5	24 October 2010	The Java implementation of Jon Claerbout's Zplane interactive pole-zero filter design program is now available from Viewmat's ``Methods->On Each Plane'' menu, and the tool shows the spectrum of the data.
3.7.1	11 October 2010	Run a Java implementation of Jon Claerbout's Zplane interactive pole-zero filter design program with ```java -cp jrg.jar ZPlane`''.
3.6.6	16 November 2009	New tsquaregain method.
3.6.5	23 July 2009	Adjustments to reading of SEGY (reads Intel float trace samples) and SAC files.
3.6.2	30 December 2008	Interface additions and adjustments including: one-button saving and loading of JRG Packs holding data, headers, and all plot parameters and picks; user can't close last plot, leaving program running with no interface; one-click undo of last pick made, refresh of plot, and resampling of pick text.
3.5.1	15 June 2007	WriteASCII now writes a single column; reading and writing of SAC files (Intel and IEEE binary); reading of Intel Pentium float binary; differentiate, decimate, and 2-d line source to 3-d point source conversion (from Vidale et al., BSSA, 1985) methods added.
3.4.2	10 April 2006	New shade method for shaded-relief generation; elimination of `Runnable` implementations to work around MacOS 10.4 Tiger Java bugs.
3.4.1	1 March 2006	Workaround in `ViewmatFrame.java` for bugs in MacOS 10.4 Tiger Java implementation.
3.4.0	31 January 2005	New xcorInferf method for cross-correlation seismic interferometry. New reduceT method to create reduced-time refraction records. Adjustments to dialog window widths.
3.3.2	6 December 2004	New despike method to deal with spikes introduced by 2004 Texan firmware upgrade.
3.3.1	8 December 2003	New color tables for hazard mapping.
3.3.0	28 July 2003	Automatic picking and stacking of hammer hits in a continuous record; new brightness-scaled color tables.