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A Graphical User Interface for Interactive Forward and Inversion Ray-Tracing
Entry ID: USGS_RayGUI

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Summary

Abstract: RayGUI is graphical user interface (GUI) to the seismic travel-time modeling program of Zelt and Smith (1992), has been released. RayGUI 2.0 represents a significant improvement over the previous version of RayGUI (RayGUI 1.04; Loss and others, 1998a, b). RayGUI 2.0 uses an updated Java version (1.3), and it can run on various operating systems (UNIX, Linux, and Mac OS X). Several new functions ... have been incorporated, including: execute the forward and inversion codes of Zelt and Smith (1992), create models or add new parts of models from an ASCII file, graphically add layers or points, graphically pinch layers, change the velocity value of a control point, report point location and velocity, import traveltime lists, generate postscript files, export the velocity model into an ASCII file, generate 1D velocity profiles at specified locations, calculate root-mean-square errors between observed and calculated arrivals for selected phases, access the ray trace log, and several other new display features.

Ray-tracing in RayGUI is performed by invoking rayinvr, a widely-used package for a 2-D forward modeling and inversion of seismic rays in an isotropic medium (Zelt and Smith, 1992). RayGUI2.0 completely integrates all the functionalities of the rayinvr program, and the user does not need to run rayinvr separately. The velocity model consists of distinct layers with continuous 2D velocity gradients, with vertically and laterally varying velocities. Layer interfaces and velocities are defined by control points, which the user specifies. Observed and calculated traveltimes can be displayed either in the same window as the velocity model or in a separate window. Users can interactively select a portion of the velocity model to display by dragging a rectangle over the velocity model, and specify time and distance ranges of the displayed plots by entering ranges in separate windows. RayGUI 2.0 enables the user to graphically edit a velocity model, to select ray type, to select shot and to change the ray-tracing parameters.

RayGUI 2.0 can be used by multiple users simultaneously as long as each user is working in a distinct working directory. Users of previous versions or RayGUI were prevented from modeling multiple arrivals from multiple shots due to a computational speed limitation. This is no longer an issue, as RayGUI 2.0 is computationally efficient.

RayGUI 2.0 was written in JAVA, and FORTRAN 77 and ANSI-C compliers are required to compile rayinvr and some auxiliary programs.

[Summary provided by the USGS.]

Related URL

Link: VIEW RELATED INFORMATION

Description: View the report on A Graphical User Interface for Interactive Forward and Inversion Ray-Tracing.

Service Citation

Originators: Jian-Li Song and Uri ten Brink
Title: A Graphical User Interface for Interactive Forward and Inversion Ray-Tracing
Release_Date: 2004
Provider: U.S. Geological Survey
Edition: 2.0
URL: http://pubs.usgs.gov/of/2004/1426/index.html

Service Keywords

DATA ANALYSIS AND VISUALIZATION >VISUALIZATION/IMAGE PROCESSING

Science Keywords

SOLID EARTH >TECTONICS >EARTHQUAKES >EARTHQUAKE MAGNITUDE/INTENSITY

SOLID EARTH >TECTONICS >EARTHQUAKES >SEISMIC PROFILE >SEISMIC BODY WAVES

SOLID EARTH >TECTONICS >EARTHQUAKES >SEISMIC PROFILE

SOLID EARTH >TECTONICS >EARTHQUAKES >SEISMIC PROFILE >SEISMIC SURFACE WAVES

ISO Topic Category

GEOSCIENTIFIC INFORMATION

Access Constraints The package can be freely obtained for non-commercial purposes by contacting Dr. Uri ten Brink at utenbrink@usgs.gov.

Ancillary Keywords

Seismic
Seismic Rays
Modeling

Service Provider

DOI/USGS/CMG/WHSC > Woods Hole Science Center, Coastal and Marine Geology, U.S. Geological Survey, U.S. Department of the Interior

Service Organization URL: http://woodshole.er.usgs.gov/

Service Provider Personnel
Name: USGS WHSC COASTAL AND MARINE GEOLOGY PROGRAM Phone: (508) 548-8700 Fax: (508) 457-2310 Contact Address: U.S. Geological Survey 384 Woods Hole Road City: Woods Hole Province or State: MA Postal Code: 02543-1598 Country: USA

Personnel

TYLER B. STEVENS
Role: SERF AUTHOR
Phone: (301) 614-6898
Fax: 301-614-5268
Email: Tyler.B.Stevens at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA

URI TEN BRINK
Role: TECHNICAL CONTACT
Phone: (508) 457-2396
Fax: (508) 457-2310
Email: utenbrink at usgs.gov
Contact Address:
U.S. Geological Survey,
Woods Hole Field Center
Quissett Campus, 384 Woods Hole Rd.
City: Woods Hole
Province or State: MA
Postal Code: 02543-1598
Country: USA

Creation and Review Dates

SERF Creation Date: 2008-04-09
SERF Last Revision Date: 2008-04-09

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