Citation_Information:
Originator: Jenna C. Hill
Originator: William C. Schwab
Originator: David S. Foster
Publication_Date: 2001
Title:
Archive of Datasonics SIS-1000 Chirp Subbottom Data Collected During USGS Cruise SEAX 96004 New York Bight, 1 May - 9 June, 1996
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2001-096
Publication_Information:
Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: https://doi.org/10.3133/ofr0196
Online_Linkage: https://woodshole.er.usgs.gov/publications/of01-96/
Larger_Work_Citation:
Citation_Information:
Originator: Jenna C. Hill
Originator: William C. Schwab
Originator: David S. Foster
Publication_Date: 2001
Title:
Archive of Datasonics SIS-1000 Chirp Subbottom Data Collected During USGS Cruise SEAX 96004 New York Bight, 1 May - 9 June, 1996
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2001-096
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details: This is a 3 DVD set.
Online_Linkage: https://woodshole.er.usgs.gov/publications/of01-96/
Abstract:
This DVD-ROM contains copies of the navigation and field chirp subbottom
data collected aboard the R/V Seaward Explorer, from 1 May - 9 June, 1996.
The coverage is in the New York Bight area. This DVD-ROM (Digital
Versatile Disc-Read Only Memory) has been produced in accordance with the
UDF (Universal Disc Format) DVD-ROM Standard (ISO 9660 equivalent) and is
therefore capable of being read on any computing platform that has
appropriate DVD-ROM driver software installed. Access to the data and
information contained on this DVD-ROM was developed using the HyperText
Markup Language (HTML) utilized by the World Wide Web (WWW) project.
Development of the DVD-ROM documentation and user interface in HTML allows
a user to access the information by using a variety of WWW information
browsers (i.e. NCSA Mosaic, Netscape) to facilitate browsing and locating
information and data. To access the information contained on this disk
with a WWW client browser, open the file 'index.htm' at the top level
directory of this DVD-ROM with your selected browser. The HTML documentation is written utilizing some HTML 4.0 enhancements. The disk
should be viewable by all WWW browsers but may not properly format on some
older WWW browsers. Also, some links to USGS collaborators and other
agencies are available on this DVD-ROM. These links are only accessible if
access to the Internet is available during browsing of the DVD-ROM. The
archived Chirp subbottom data are in standard Society of Exploration
Geologists (SEG) SEG-Y format (Barry and others, 1975) and may be
downloaded for processing with software such as Seismic Unix or SIOSEIS.
The subbottom data were recorded on the ISIS data acquisition system in
QMIPS format. Chirp subbottom channel extracted from raw QMIPS format
sonar files and converted to 16-bit Int. SEG-Y format using the program
QMIPSTOSEGY. Even though the data are in SEG-Y format, it is not the
conventional time series data (e.g. voltages or pressures), but rather
instantaneous amplitude or envelope detected and therefore all of the
amplitudes are positive (though not simply rectified). DOS and Microsoft
Windows compatible software for plotting SEG-Y files (PLOTSEIS) and
viewing SEG-Y headers (DUMPSEGY) is located in the PLOTSEIS directory.
Processed chirp profiles (GIF images) may be viewed on this DVD-ROM with
your WWW browser.
For more information on the seismic surveys see
https://cmgds.marine.usgs.gov/fan_info.php?fan=1996-004-FA
These data are also available via GeoMapApp (
http://www.geomapapp.org/) and Virtual Ocean (
http://www.virtualocean.org/) earth science exploration and visualization applications.
Beginning in 1995, the USGS, in cooperation with the US Army Corps of Engineers (USACE), New York District, began a program to generate reconnaissance maps of the sea floor offshore of the New York-New Jersey metropolitan area, one of the most populated coastal regions of the United States. The goal of this mapping program is to provide a regional synthesis of the sea-floor environment, including a description of sedimentary environments, sediment texture, seafloor morphology, and geologic history to aid in understanding the impacts of anthropogenic activities, such as ocean dumping. This mapping effort differs from previous studies of this area by obtaining digital, sidescan sonar images that cover 100 percent of the sea floor. This investigation was motivated by the need to develop an environmentally acceptable solution for the disposal of dredged material from the New York - New Jersey Port, by the need to identify potential sources of sand for renourishment of the southern shore of Long island, and by the opportunity to develop a better understanding of the transport and long-term fate of contaminants by investigations of the present distribution of materials discharged into the New York Bight over the last 100+ years (Schwab and others, 1997).
Supplemental_Information:
Seismic reflection profiles are acquired by means of an acoustic source (usually generated electromagnetically or with compressed air), and a hydrophone or hydrophone array. Both elements are typically towed in the water behind a survey vessel, or some cases, mounted on side of the hull. The sound source emits a short acoustic pulse, which propagates through the water and sediment columns. The acoustic energy is reflected at density boundaries (such as the seafloor or sediment layers beneath the seafloor), and detected at the hydrophone. As the vessel moves, this process is repeated at intervals ranging between 0.5 and 20 meters depending on the source type. In this way, a two-dimensional image of the geologic structure beneath the ship track is constructed. For more information concerning seismic reflection profiling at the USGS Woods Hole Field Center, see
https://woodshole.er.usgs.gov/operations/sfmapping/.
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:c09aec35-6385-418d-a0be-197c707c9c0a
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: seismic reflection
Theme_Keyword: SEG-Y
Theme_Keyword: Chirp
Theme_Keyword: Datasonics SIS-1000
Theme_Keyword: high resolution
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: field activity 96004
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: geoscientificInformation
Theme:
Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: distributions
Theme_Keyword: substrate
Theme:
Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) Keywords
Theme_Keyword: seismic reflection profiling
Theme_Keyword: marine geophysics
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: seismic reflection methods
Theme_Keyword: sub-bottom profiling
Theme_Keyword: marine geophysics
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Atlantic Ocean
Place_Keyword: New York
Place_Keyword: New York Bight
Place_Keyword: New Jersey
Place_Keyword: Long Island inner shelf
Place_Keyword: USGS
Place_Keyword: Woods Hole Field Center (WHFC)
Place_Keyword: Eastern Regional Center
The US Geological Survey must be referenced as the originator of the dataset in any future products or research derived from these data.
