Thomas F O'Brien (Former Employee)
Science and Products
Sea Floor Mapping Group
The Sea Floor Mapping Group (SFMG) is a core capability at the Woods Hole Coastal & Marine Science Center (WHCMSC) that provides support for coastal, lacustrine and marine geologic research. The staff has a wide-range of expertise and is responsible for geophysical and sampling data acquisition, processing,...
Measurement of sounds emitted by certain high-resolution geophysical survey systems
Scientific questions regarding the impact of anthropomorphic noise in the marine environment have resulted in an increasing number of regulatory requirements and precautionary mitigation strategies to reduce the risks associated with high-resolution marine geophysical surveys performed in waters subjected to government jurisdiction. An example of...
Crocker, Steven E; Fratantonio, Frank D; Hart, Patrick E.; Foster, David S.; O'Brien, Thomas F.; Labak, Stanley
Cruise report for P1-13-LA, U.S. Geological Survey gas hydrates research cruise, R/V Pelican April 18 to May 3, 2013, deepwater Gulf of Mexico
The U.S. Geological Survey led a seismic acquisition cruise in the Gulf of Mexico from April 18 to May 3, 2013, with the objectives of (1) achieving improved imaging and characterization at two established gas hydrate study sites, and (2) refining geophysical methods for gas hydrate characterization in other locations. We conducted this...
Haines, Seth S.; Hart, Patrick E.; Ruppel, Carolyn; O'Brien, Thomas; Baldwin, Wayne; White, Jenny; Moore, Eric; Dal Ferro, Peter; Lemmond, Peter Progress in development of shallow-water mapping systems by the U.S. Geological Survey
No abstract available.
Bergeron, Emile M.; Worley, Charles R.; O'Brien, Thomas F. Progress in the development of shallow-water mapping systems
The USGS (US Geological Survey) Coastal and Marine Geology has deployed an advance autonomous shallow-draft robotic vehicle, Iris, for shallow-water mapping in Apalachicola Bay, Florida. The vehicle incorporates a side scan sonar system, seismic-reflection profiler, single-beam echosounder, and global positioning system (GPS) navigation. It is...
Bergeron, E.; Worley, C.R.; O'Brien, T.
Archive of chirp subbottom data collected during USGS cruise ATSV99045, northern North Carolina, October 9-27, 1999
Capone, Mark K.; Thieler, E. Robert; Nichols, David R.; O'Brien, Thomas F. Deep-towed CHIRP profiles of the Blake Ridge collapse structure collected on USGS Cruises 92023 and 95023 aboard the R/V Cape Hatteras in 1992 and 1995
Nealon, Jeffrey W.; Dillon, William P.; Danforth, William W.; O'Brien, Thomas F. First results of a deep tow CHIRP sonar seafloor imaging system
The latest and most innovative technology has been applied towards the development of a full-ocean depth multi-sensor sonar system using linear swept-FM (Chirp) technology. The seafloor imaging system (SIS- 7000) described herein uses Chirp sidescan sonar to provide high resolution imagery at long range, and Chirp subbottom sonar to provide high...
Parent, M.; Fang, Changle; O'Brien, Thomas F.; Danforth, William W. Near-real-time mosaics from high-resolution side-scan sonar
High-resolution side-scan sonar has proven to be a very effective tool for stuyding and understanding the surficial geology of the seafloor. Since the mid-1970s, the US Geological Survey has used high-resolution side-scan sonar systems for mapping various areas of the continental shelf. However, two problems typically encountered included the...
Danforth, William W.; O'Brien, Thomas F.; Schwab, W.C.