U.S. Geological Survey Data Series 563
1U.S. Geological Survey, St. Petersburg, FL 33701.
2Jacobs Technology Inc., Tampa, FL 33609.
U.S. Department of the Interior
U.S. Geological Survey
Coastal and Marine Science Center - St. Petersburg
Publications are available from USGS Information Services, Box 25286, Federal Center, Denver, CO 80225-0046 (telephone 1-888-ASK-USGS; e-mail: firstname.lastname@example.org).
Figure 1. USGS Cruise 10CCT01 study area, offshore of Cat Island, Gulf Islands National Seashore, Mississippi.
This DVD publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
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In March of 2010, the U.S. Geological Survey (USGS) conducted geophysical surveys east of Cat Island, Mississippi (fig. 1). The efforts were part of the USGS Gulf of Mexico Science Coordination partnership with the U.S. Army Corps of Engineers (USACE) to assist the Mississippi Coastal Improvements Program (MsCIP) and the Northern Gulf of Mexico (NGOM) Ecosystem Change and Hazards Susceptibility Project by mapping the shallow geological stratigraphic framework of the Mississippi Barrier Island Complex. These geophysical surveys will provide the data necessary for scientists to define, interpret, and provide baseline bathymetry and seafloor habitat for this area and to aid scientists in predicting future geomorpholocial changes of the islands with respect to climate change, storm impact, and sea-level rise. Furthermore, these data will provide information for barrier island restoration, particularly in Camille Cut, and provide protection for the historical Fort Massachusetts. For more information refer to http://ngom.usgs.gov/gomsc/mscip/.
This report serves as an archive of the processed swath bathymetry and side scan sonar data (SSS). Data products herein include gridded and interpolated surfaces, surface images, and x,y,z data products for both swath bathymetry and side scan sonar imagery. Additional files include trackline maps, navigation files, GIS files, Field Activity Collection System (FACS) logs, and formal FGDC metadata. Scanned images of the handwritten FACS logs and digital FACS logs are also provided as PDF files. Refer to the Acronyms page for expansion of acronyms and abbreviations used in this report or hold the cursor over an acronym for a pop-up explanation.
The USGS St. Petersburg Coastal and Marine Science Center assigns a unique identifier to each cruise or field activity. For example, 10CCT01 tells us the data were collected in 2010 for the Coastal Change and Transport (CCT) study and the data were collected during the first field activity for that project in that calendar year. Refer to http://walrus.wr.usgs.gov/infobank/programs/html/definition/activity.html for a detailed description of the method used to assign the field activity ID.
Data were collected using a 26-foot (ft) Glacier Bay Catamaran. Side scan sonar and interferometric swath bathymetry data were collected simultaneously along the tracklines. The side scan sonar towfish was towed off the port side just slightly behind the vessel, close to the seafloor. The interferometric swath transducer was sled-mounted on a rail attached between the catamaran hulls. During the survey the sled is secured into position. Navigation was acquired with a CodaOctopus Octopus F190 Precision Attitude and Positioning System and differentially corrected with OmniSTAR. See the digital FACS equipment log for details about the acquisition equipment used. Both raw datasets were stored digitally and processed using CARIS HIPS and SIPS software at the USGS St. Petersburg Coastal and Marine Science Center. For more information on processing refer to the Equipment and Processing page. Post-processing of the swath dataset revealed a motion artifact that is attributed to movement of the pole that the swath transducers are attached to in relation to the boat. The survey took place in the winter months, in which strong winds and rough waves contributed to a reduction in data quality. The rough seas contributed to both the movement of the pole and the very high noise base seen in the raw amplitude data of the side scan sonar. Chirp data were also collected during this survey and are archived separately.
To access the information contained on this disc, use a Web browser to open the file index.html. This report is divided into eight sections: Acronyms, Figures, Navigation, Equipment and Processing, Images, Logs,
It was an effort to accomplish these works and we would not have been able to do so without the help and support of several partnering teams. The Framework Group (FRAWG) at the USGS St. Petersburg Coastal and Marine Science Center would like to thank the following for their efforts:
Funding for this project was provided by the Mississippi Coastal Improvements Program (MsCIP) and the Northern Gulf of Mexico Ecosystem Change and Hazard Susceptibility (NGOM).
The USGS Woods Hole Science Center – Seafloor Mapping Group, Woods Hole, Massachusetts: In particular, David C. Twichell, Elizabeth A. Pendelton, and William W. Danforth for their coordinated works with our surveying activities and their continued expert technical consultations supporting the USGS St. Petersburg - FRAWG staff.
Lijuan Huang and Gerald Hovis at NOAA/NOS/CO-OPS for their efforts to create the tidal zone definition for this work.
Point Cadet Marina Harbor Masters: Jim Nations, Richard Johnson, and staff of the City of Biloxi, MS, for the use of their facilities and around the clock security provided in helping to protect Federal Government assets.
Karen Hart - Senior Hydrographic Consultant, CARIS USA, Alexandria, VA.
USGS St. Petersburg Coastal and Marine Science Center supporting staff:
Hayes, M.P., and Barclay, P.J., 2003, The effects of multipath on a bathymetric synthetic aperture sonar using belief propagation, in Bailey, D.G.,ed., Proceedings of Image and Vision Computing New Zealand 2003, Novermber 26-28: Palmerston North, New Zealand, Massey University, 6p.
SEA Ltd., 2005, SWATHplus Training Pack: Systems Engineering and Assessment Ltd.,
DeWitt, N.T., Flocks, J.G., Pfeiffer, W.R., and Wiese, D.S., 2010, Archive of side scan sonar and swath bathymetry data collected during USGS cruise 10CCT01 offshore of Cat Island, Gulf Islands National Seashore, Mississippi, March 2010: U.S. Geological Survey Data Series 563, 1 CD-ROM.