Metadata: Identification_Information Citation: Citation_Information: Originator: Schwab, Bill Publication_Date: 1997 Title: Archive of Datasonics SIS-1000 Boomer Subbottom Data Collected During USGS Cruise DIAN 97011 Long Island, NY Inner Shelf -- Fire Island, NY, 5-26 May, 1997 Publication_Information: Publication_Place: Woods Hole, MA Publisher: U.S. Geological Survey Other_Citation_Details: none Online_Linkage: none Description: Abstract: This CD-ROM contains digital high resolution seismic reflection data collected during the USGS DIAN 97011 cruise. The coverage is the nearshore of Long Island, NY in the vicinity of Fire Island. The seismic-reflection data are stored as SEG-Y standard format that can be read and manipulated by most seismic-processing software. Much of the information specific to the data are contained in the headers of the SEG-Y format files. The file system format is ISO 9660 which can be read with DOS, Unix, and MAC operating systems with the appropriate CD-ROM driver software installed. Purpose: In 1995, the USGS Woods Hole Field Center, in Cooperation with the U.S. Army Corps of Engineers, began a program designed to map the seafloor offshore of the New York-New Jersey metropolitan area; the most heavily populated, and one of the most impacted coastal regions of the United States. The ultimate goal of this program is to provide an overall synthesis of the sea floor environment, including surficial sediment texture, subsurface geometry, and anthropogenic impact (e.g. ocean dumping, trawling, channel dredging), through the use and analysis of sidescan-sonar and subbottom mapping techniques. This regional synthesis will support a wide range of management decisions and will provide a basis for further process-oriented investigations. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19970508 Beginning_Time: 000000 Ending_Date: 19970526 Ending_Time: 000000 Currentness_Reference: publication date Status: Progress: In work Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -73.53333 East_Bounding_Coordinate: -72.81667 North_Bounding_Coordinate: 40.78333 South_Bounding_Coordinate: 40.5 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: seismic reflection Theme_Keyword: SEG-Y Theme_Keyword: Boomer Theme_Keyword: Geopulse Theme_Keyword: ISO 9660 CD-ROM Place: Place_Keyword_Thesaurus:None Place_Keyword: Atlantic Ocean Place_Keyword: New York Place_Keyword: NY Place_Keyword: Long Island inner shelf Place_Keyword: Fire Island Access_Constraints: for U.S. Geological Survey use only Use_Constraints: for U.S. Geological Survey use only Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Schwab, Bill Contact_Organization: U.S. Geological Survey Contact_Position: Seafloor Mapping Project Contact_Address: Address_Type: mailing address Address: U.S. Geological Survey Woods Hole Field Center 384 Woods Hole Road Quissett Campus City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: bschwab@usgs.gov Data_Set_Credit: Seafloor Mapping Group Native_Data_Set_Environment: SEG-Y Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Quantitative_Attribute_Accuracy_Assessment: Attribute_Accuracy_Value: Attribute_Accuracy_Explanation: Logical_Consistency_Report: The SEG-Y files were plotted onboard ship using SIOSEIS seismic processing software Completeness_Report: archive of SEG-Y format seismic data Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The ship was navigated with differential GPS Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: 5-10 meters Horizontal_Positional_Accuracy_Explanation: DGPS is assumed to be accurate within 5-10 meters Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: The vertical position was local sea level and there was no correction to a datum Quantitative_Vertical_Positional_Accuracy_Assessment: Vertical_Positional_Accuracy_Value: Vertical_Positional_Accuracy_Explanation: Lineage: Process_Step: Process_Description: The subbottom data were recorded on the Mudseis data acquisition system in SEG-Y format. The conversion program processSegy was used to renumber the traces as trace 1 or traces 1 and 2 for 2-channel data and fill out the SEG-Y EBCDIC reel header. Traces were renumbered because the Mudseis system begins with trace 0 instead of 1. The data were filtered with a low pass of 300 Hz and a high pass of 3000 Hz at the acquistion step alnong with a 48 db gain. Source_Used_Citation_Abbreviation: Process_Date: 199705 Source_Produced_Citation_Abbreviation: Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Foster, David S. Contact_Organization: U.S. Geological Survey Contact_Position: Seafloor Mapping Project Contact_Address: Address_Type: mailing address Address: U.S. Geological Survey Woods Hole Field Center 384 Woods Hole Road Quissett Campus City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country:USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: dfoster@usgs.gov Spatial_Data_Organization_Information: Indirect_Spatial_Reference: Horizontal X and Y UTM coordinates for each shot location are located in the SEG-Y trace headers Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name Universal_Transverse_Mercator: UTM_Zone_Number: 18 Transverse_Mercator: Scale_Factor_at_Central_Meridian: .9997 Longitude_of_Central_Meridian: -75 Latitude_of_Projection_Origin: 0 False_Easting: 0 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 5 Ordinate_Resolution: 5 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298257 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: assumed sea level Altitude_Resolution: 1 Altitude_Distance_Units: two-way travel time Altitude_Encoding_Method: Attribute values Depth_System_Definition: Depth_Datum_Name: local surface (sea level) Depth_Resolution: 1 Depth_Distance_Units: meters Depth_Encoding_Method: Attribute values Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: The data were acquired using an ORE/ Huntec boomer seismic profiling system. A Geopulse or Huntec electro-mechanical source was used. ITI and Benthos streamers were the receivers. Seismic data were logged digitally with the Mudseis acquisition system. The SEG-Y data were checked for quality with SIOSEIS seismic processing software and are archived on this CD-ROM. The SEG-Y format is described in detail by Barry and others (1975). The files are in standard 16-bit integer SEG-Y format. The SEG-Y files consist of shot files with one or two traces per shot depending if one or two channels were recorded. Channel one was an ITI streamer and channel 2 when recorded was a Benthos streamer. There are 1600 samples per trace. The sample rate was 0.125 ms which resulted in a trace length of 200 ms. The boomer was fired at a rate of 0.5 seconds. Entity_and_Attribute_Detail_Citation: Barry, K.M., Cavers, D.A., and Kneale, C.W., 1975, Recommended standards for digital tape formats, in Digital Tape Standards; Society of Exploration Geophysicists ["Recommended standards for digital tape formats" reprinted from Geophysics, v. 32, p. 1073 - 1084; v. 37, p. 36-44; v. 40, p. 344 - 352.] p. 22 - 30. Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Soderberg, Nancy Contact_Organization: U.S. Geological Survey Contact_Position: Data Library Contact_Address: Address_Type: mailing address Address: U.S. Geological Survey Woods Hole Field Center 384 Woods Hole Road Quissett Campus City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: nsoderberg@usgs.gov Resource_Description: U.S. Geological Suvey Internal CD-ROM Data Archive Distribution_Liability: This Compact Disc-Read Only Memory (CD-ROM) publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data published on this CD-ROM have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and/or the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data, software, or related materials. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ISO 9660 CD-ROM Format_Version_Number: ISO 9660 Format_Specification: Format_Information_Content: SEG-Y File_Decompression_Technique: none Transfer_Size: 650 MB Digital_Transfer_Option: Offline_Option: Offline_Media: CD-ROM Recording_Format: ISO 9660 Compatibility_Information: UNIX, DOS, MAC Fees: Metadata_Reference_Information: Metadata_Date: 19970408 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Foster, David Contact_Organization: U.S. Geological Survey Contact_Position: Seafloor Mapping Group Contact_Address: Address_Type: mailing address Address: U.S. Geological Survey Woods Hole Field Center 384 Woods Hole Road Quissett Campus City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: dfoster@usgs.gov Metadata_Standard_Name: FGDC Content Standard Metadata_Standard_Version: 19940608 Metadata_Time_Convention: universal time Metadata_Access_Constraints: none Metadata_Use_Constraints: none