HR: 0830h
AN: OS11B-0365
TI: University of Texas Institute for Geophysics Seismic Reflection Data Search Site
AU: * Shipley, T H
EM: tom at ig.utexas.edu
AF: Institute for Geophysics, University of Texas, Austin, TX 78759 United States
AU: Gahagan, L M
EM: lisa@ig.utexas.edu
AF: Institute for Geophysics, University of Texas, Austin, TX 78759 United States
AU: Johnson, K M
EM: kevin@ig.utexas.edu
AF: Institute for Geophysics, University of Texas, Austin, TX 78759 United States
AB: Since 1974 the University of Texas Institute for Geophysics (UTIG) has been acquiring digital seismic reflection data. UTIG's conventional archive contains the equivalent of approximately 16,000 field tapes and 3000 processed sections. There is no simple means to peruse data that are held in the archives resulting in gross under-utilization. This is a common problem for reflection data at other research institutions as well. Conversion of the archive to a modern online searchable data base and download facility is underway. As the first part of this development, UTIG data in the offshore regions of Southwest Japan and Costa Rica-Nicaragua are now available online. Our present efforts are aimed at (1) ensuring the integrity of the digital data, (2) creating descriptive meta-data, and (3) providing rudimentary web access to a searchable database with links to downloadable seismic, navigation and image files. For field records, the bulk of the data, our goal is to provide metadata for independent reprocessing for educational or research needs. Older field data require supporting information about the geometry of the experiment, observer logs and other quality control information available in notebooks. More recent experiments are collecting these data in digital form for easier inclusion in the data base and for metadata construction. All shot data are in binary SEG-Y format. A valuable component of the database is the inclusion of stacks, migrations and single-channel sections produced during the course of project-related research. These processed data include the SEG-Y files, images and trace locations (stored in the SEG-Y headers and duplicated in linked ASCII files). Metadata include a simplified processing history. For specialists, the processed SEG-Y files may be used for additional post-stack processing, display or loading into interpretation systems. For non-specialists and students the images provide instant access to geologic cross sections around the world. Because of the intellectual effort provided by the original investigators, users should cite appropriate references. Most of the processed data should be online with appropriate metadata within one year.
UR: http://www.ig.utexas.edu/srws
DE: 0900 EXPLORATION GEOPHYSICS
DE: 3000 MARINE GEOLOGY AND GEOPHYSICS
DE: 3025 Marine seismics (0935)
SC: OS
MN: 2001 AGU Fall Meeting