Archive of Boomer Seismic Reflection Data Collected During USGS Cruises 01SCC01 and 01SCC02, Timbalier Bay and Offshore East Timbalier Island, Louisiana, June - August 2001

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Karynna Calderon
Originator: Shawn V. Dadisman
Originator: James G. Flocks
Originator: Jack L. Kindinger
Originator: Dana S. Wiese
Publication_Date: 2003
Title:
Archive of Boomer Seismic Reflection Data Collected During USGS Cruises 01SCC01 and 01SCC02, Timbalier Bay and Offshore East Timbalier Island, Louisiana, June - August 2001
Geospatial_Data_Presentation_Form: Seismic Reflection Profile Section
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 03-274
Publication_Information:
Publication_Place: St. Petersburg, FL
Publisher: U.S. Geological Survey
Online_Linkage: https://pubs.usgs.gov/of/2003/of03-274/
Description:
Abstract:
This archive consists of two-dimensional marine seismic reflection profile data collected in Timbalier Bay and in the Gulf of Mexico offshore East Timbalier Island, Louisiana. These data were acquired June 30 - July 9 (01SCC01) and August 1 - 18 (01SCC02), 2001, aboard the R/V G.K. Gilbert and a University of New Orleans 21-foot Proline. Included here are data in a variety of formats including binary, American Standard Code for Information Interchange (ASCII), Hyper Text Markup Language (HTML), Portable Document Format (PDF), Rich Text Format (RTF), Graphics Interchange Format (GIF) and Joint Photographic Experts Group (JPEG) images, and shapefiles. Binary data are in Society of Exploration Geophysicists (SEG) SEG-Y format and may be downloaded for further processing or display. Reference maps and GIF images of the profiles may be viewed with a web browser. The Geographic Information Systems (GIS) map documents provided were created with Environmental Systems Research Institute (ESRI) GIS software ArcView 3.2 and 8.1.
For more information on the seismic surveys see http://walrus.wr.usgs.gov/infobank/g/g401la/html/g-4-01-la.meta.html and http://walrus.wr.usgs.gov/infobank/g/g501la/html/g-5-01-la.meta.html
These data are also available via GeoMapApp (http://www.geomapapp.org/) and Virtual Ocean ( http://www.virtualocean.org/) earth science exploration and visualization applications.
Purpose:
Marine seismic reflection data are used to image and map sedimentary and structural features of the seafloor and subsurface. These data are useful in mapping stratigraphy and in assessing other submarine geologic characteristics and features. These data were collected as part of a Louisiana Sand Resources Study done in collaboration with the University of New Orleans, the U.S. Army Corps of Engineers, and the Louisiana Department of Natural Resources. This study is part of the U.S Geological Survey (USGS) Subsidence and Coastal Change (SCC) Project.
Supplemental_Information:
The USGS Center for Coastal and Watershed Studies team in St. Petersburg, Florida, assigns a unique identifier to all seismic data collected during each cruise or field activity. The method used to assign the identifier for the activity is as follows: YYPPP##, where YY stands for the last 2 digits of the year in which the fieldwork is conducted, PPP is a 3-letter abbreviation for the project the data are collected for, and ## is a 2-digit event tag that represents a discreet leg or time period of fieldwork. Here, for example, 01SCC01 tells us the data were collected in 2001 for the Subsidence and Coastal Change Project and that the data were collected during the first field activity for that project in that calendar year. The naming convention the center uses for each seismic line is as follows: yye###a, where yy is the last 2 digits of the year in which the data were collected, e is a 1-letter abbreviation for the equipment type (i.e., c for chirp and b for boomer), ### is a 3-digit number representing a specific track, and a is a 1-letter abbreviation representing the section of a line if recording was prematurely terminated or rerun for quality or acquisition problems. Seismic reflection profiles are acquired by means of an acoustic source (usually generated electronically) and hydrophone or receiver arrays. Both elements are typically towed in the water behind a survey vessel. The sound source emits a short acoustic pulse, or shot, that propagates through the water and sediment column. The acoustic energy is reflected at density boundaries (such as the seafloor or sediment layers beneath the seafloor) and detected at the receiver. This process is repeated at intervals ranging between 100 milliseconds (ms) and 1 second (s) depending on the seismic source employed. In this way, a two-dimensional vertical image of the geologic structure beneath the ship track can be interpreted. The boomer energy source consists of capacitors that are charged to a high voltage and then discharged through a transducer in the water. The frequency range of the source is between 300 and 3,000 hertz (Hz). The transducer was towed on a sled at the sea surface providing 100 joules (J) per shot for lines 01b001-01b046 and 01b082-01b093 and 200 J per shot for lines 01b047-01b080. The reflected energy was received by a streamer and recorded by PC-based Triton Elics Delph Seismic acquisition software. In an attempt to resolve unknown acquisition problems, streamers were switched throughout the first cruise between Innovative Technologies, Inc. (ITI) ST5 and SN Technologies NexGen streamers. Only the NexGen streamer was used for the second cruise. Both streamers contain 10 hydrophones. These are evenly spaced every 2 feet (0.6 m) on the ITI streamer and every 2 m on the NexGen streamer. Only data received by elements 4-7 were summed for lines 01b001-01b028, by elements 5 and 6 for lines 01b029-01b089, and by elements 7 and 8 for lines 01b091-01b093. The streamer was positioned parallel to the boomer sled and laterally separated from it by about 7 m for lines 01b001-01b080, which were collected on the R/V G.K. Gilbert, and by about 4 m for lines 01b082-01b093, which were collected on a 21-foot Proline. The sled was towed about 20 m behind the Global Positioning System (GPS) antenna on the R/V G.K. Gilbert and about 12 m behind on the Proline. No correction for this offset has been made. The sample frequency of the data was 12 kilohertz (kHz). All tracklines were recorded to 100 ms. Based on survey speeds of 3.5-4 knots and a shot rate of every 0.5 s, the shot spacing was about 1 m. Seismic data were stored in SEG-Y format, which is a standard digital format that can be read and manipulated by most seismic processing software packages. The SEG-Y file format includes a 3,200-byte descriptive header that contains detailed information regarding the data acquisition and processing parameters. All data presented here are stored in SEG-Y, integer, Motorola format. The SEG-Y formatted trace data files have a .TRA extension. Additional recording parameters for each seismic data file can also be found in the .PAR file associated with each .TRA file. However, the .PAR and .pln files included are only needed to process or display the data with Triton Elics Delph Seismic software. No SEG-Y data exists for tracklines 01b002 and 01b081. For lines 01b001-01b080, Differential GPS (DGPS) navigation was provided by a CSI DGPS Max WAAS/Beacon DGPS receiver, whose accuracy is within 5 m. The DGPS string was fed to a navigation computer running Hypack software, which converted the data to Zone 15 Universal Transverse Mercator (UTM) coordinates. The navigation was then fed to the Delph Seismic acquisition system approximately every second and recorded in the SEG-Y headers. For lines 01b082-01b093, GPS navigation was provided by a Trimble Centurian P-Code receiver, whose accuracy is within about 100 m. The GPS string was fed directly to the acquisition system approximately every second in latitude and longitude and recorded in the SEG-Y headers. Both UTMs and latitude and longitude are provided for all lines. The data required some editing to remove spurious data values. The edited results were used to generate the trackline maps presented here. The navigation data have not been corrected to reflect the offset between the shotpoint and the GPS antenna. Position fixes for every 500 shots and for the start of lines are also provided as an aid for registering of the data after plotting. All navigation files are stored as flat ASCII text files. The trackline maps provided in this archive are unprojected, set in geographic coordinates, North American Datum 1983 (NAD83). They were created using ESRI GIS software ArcView 3.2 and 8.1, exported to Adobe Illustrator for further editing, and saved for the web in JPEG format. These JPEG images are viewable with a web browser. Also included on this disc are the ArcView map documents and shapefiles used to create the trackline maps presented here. The map documents are compatible with ArcGIS 8.x (Windows). The shapefiles can also be viewed using ArcView 3.x or public domain software ArcExplorer 2.0 (Windows) and 4.0 (Windows, Unix, Linux), which can currently be downloaded from the ESRI website at <http://www.esri.com/software/arcexplorer/index.html>. Field Activity Collection System (FACS) logs are available in both HTML and Rich Text Format. Scanned versions of the handwritten logbooks are provided as PDF files. Also included on this disc are example Seismic Unix (SU) scripts that allow the user to strip off navigation fixes from the SEG-Y headers, along with a fix for every 500 shots, and produce a filtered and gained GIF image of each profile. These images can then be displayed using a variety of shareware programs such as ImageMagick (Unix, Linux) or a web browser.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20010630
Ending_Date: 20010818
Currentness_Reference: Data collection interval
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -90.394838
East_Bounding_Coordinate: -90.182451
North_Bounding_Coordinate: 29.149325
South_Bounding_Coordinate: 28.963148
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:6c848e02-948d-4116-aa13-54c964726318
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: marine seismic reflection
Theme_Keyword: boomer
Theme_Keyword: SEG-Y
Theme_Keyword: 01SCC01
Theme_Keyword: 01SCC02
Theme_Keyword: Subsidence and Coastal Change Project
Theme_Keyword: Louisiana Sand Resources Study
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
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: Timbalier Bay
Place_Keyword: East Timbalier Island
Place_Keyword: Louisiana
Place_Keyword: Gulf of Mexico
Access_Constraints: None. These data are held in the public domain.
Use_Constraints:
The U.S. Geological Survey requests to be acknowledged as the originator of the data in future products or derivative research.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Jack L. Kindinger
Contact_Organization: U.S. Geological Survey
Contact_Position: Oceanographer
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-803-3747, ext. 3018
Contact_Electronic_Mail_Address: jkindinger@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2003/of03-274/maps/all.jpg
Browse_Graphic_File_Description:
Trackline map of all boomer seismic reflection data collected during USGS Cruises 01SCC01 and 01SCC02. These data were collected in Timbalier Bay and in the Gulf of Mexico offshore of East Timbalier Island, Louisiana, in June, July, and August of 2001. This map is set in geographic coordinates, NAD83 (unprojected) and was created at a scale of 1:200,000. It was created using ESRI GIS software ArcView 3.2 and 8.1, exported to Adobe Illustrator for further editing, and saved for the web in JPEG format. The USGS is not the originator of all layers used in creating the maps presented in this archive. The roads layer is a Louisiana Oil Spill Coordinator's Office (LOSCO) Environmental Baseline Inventory Dataset 'Louisiana Highway System from LDOTD (Louisiana Department of Transportation) source data, Geographic NAD83, LOSCO (1999) [primary roads].' The rivers layer is a LOSCO data set derived from ESRI/Geographic Data Technology, Inc. (GDT) data that were in turn derived from Bureau of the Census TIGER/Line files. The waterbodies layer is also a LOSCO data set derived from ESRI/GDT data.
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2003/of03-274/maps/area_a.jpg
Browse_Graphic_File_Description:
Trackline map of boomer seismic reflection data collected in Area A (refer to Area A of the full survey map) of Timbalier Bay, Louisiana, during USGS Cruises 01SCC01 and 01SCC02 in June, July, and August of 2001. This map is set in geographic coordinates, NAD83 (unprojected) and was created at a scale of 1:110,000. It was created using ESRI GIS software ArcView 3.2 and 8.1, exported to Adobe Illustrator for further editing, and saved for the web in JPEG format. The USGS is not the originator of all layers used in creating this map. The waterbodies layer is a LOSCO data set derived from ESRI/GDT data.
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2003/of03-274/maps/area_b.jpg
Browse_Graphic_File_Description:
Trackline map of boomer seismic reflection data collected in Area B (refer to Area B of the full survey map) of the Gulf of Mexico offshore of East Timbalier Island, Louisiana, during USGS Cruises 01SCC01 and 01SCC02 in June, July, and August of 2001. This map is set in geographic coordinates, NAD83 (unprojected) and was created at a scale of 1:110,000. It was created using ESRI GIS software ArcView 3.2 and 8.1, exported to Adobe Illustrator for further editing, and saved for the web in JPEG format. The USGS is not the originator of all layers used in creating this map. The waterbodies layer is a LOSCO data set derived from ESRI/GDT data.
Browse_Graphic_File_Type: JPEG
Data_Set_Credit:
Funding and/or support for this study were provided by the USGS Coastal and Marine Geology Program (CMGP), the University of New Orleans, the U.S. Army Corps of Engineers, and the Louisiana Department of Natural Resources. We thank R/V G.K. Gilbert Captains Dave Bennett of Eckerd College in St. Petersburg, Florida, and Keith A. Ludwig and Richard W. Young of the USGS in St. Petersburg, Florida, for their assistance in data collection. We also thank reviewers Thomas J. Smith and Kimberly K. Yates of the USGS in St. Petersburg, Florida, whose comments improved this document.
Native_Data_Set_Environment: SEG-Y
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The validity or accuracy of marine seismic reflection profiles is highly qualitative and depends on equipment and operating condition variables. Data acquisition problems existed during 01SCC01. The result appears to be spatial aliasing of the data in most lines. Visual inspection of the images rendered from the data in 01SCC02 did not show any major anomalies.
Logical_Consistency_Report:
These data sets are from two field activities and two different vessels. Differences occur in navigation and acquisition equipment and acquisition geometry between vessels and field activities. Horizontal accuracy varies with navigation equipment used, and signal-to-noise ratio of the data changes with hydrophone streamers used. However, for most purposes, the profile data are comparable for all systems used. Please refer to Supplemental Information for details of equipment and geometry used for each seismic line.
Completeness_Report:
These data are collected along tracklines (2D). Therefore, data are inherently incomplete. Geologic details between lines must be inferred. All tracklines were recorded to 100 ms. No digital data exists for tracklines 01b002 and 01b081. There is no navigation for line 01b004 before shot number 123, for line 01b058 between shot numbers 510 and 913, for line 01b087 between shot numbers 1 and 314, for line 01b090 between shot numbers 6,012 and 6,721, or for line 01b091 between shot numbers 4,023 and 4,346.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Positional accuracy for lines 01b001-01b080 was determined with a CSI DGPS Max WAAS/Beacon DGPS receiver, whose accuracy is within about 5 m. The DGPS string was fed to a navigation computer running Hypack software, which converted the data to Zone 15 UTMs. The navigation was then fed to the Delph Seismic acquisition system approximately every second and recorded in the SEG-Y headers. Positional accuracy for lines 01b082-01b093 was determined with a Trimble Centurian P-Code receiver, whose accuracy is within about 100 m. The GPS string was fed directly to the acquisition system approximately every second in latitude and longitude and recorded in the SEG-Y headers. Both UTMs and latitude and longitude are provided for all lines. The navigation data have not been corrected to reflect the offset between the shotpoint and the GPS antenna.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Boomer data are relative to sea level. However, varying recorded static shifts of the data have been known to occur. Therefore, these data are not to be used for bathymetry.
Lineage:
Process_Step:
Process_Description:
Boomer processing: Raw SEG-Y data were processed with Seismic Unix to produce the GIF seismic profiles included in this report. A representative data processing sequence consisted of: 1) Bandpass filter: 300-500-2500-3000 Hz 2) Automatic gain control 3) Postscript display 4) Convert Postscript image to GIF image
Process_Date: 2003
Process_Step:
Process_Description:
Positional (navigation) data: As the seismic reflection data were acquired, the position of the vessel was continuously determined by a GPS receiver. Positions were recorded approximately every second and written to the SEG-Y header. The ASCII navigation and the 500-shot interval navigation files were extracted from the SEG-Y headers using Seismic Unix scripts.
Process_Date: 2003
Process_Step:
Process_Description:
Editing navigation: The ASCII navigation files were extracted from the SEG-Y headers and edited to remove spurious data points. The data were then processed using PROJ.4 freeware to convert Zone 15 UTMs to latitude and longitude for lines 01b001-01b080, and to convert latitude and longitude to UTMs for lines 01b082-01b093. The data were also reformatted for use with ESRI ArcView GIS software. ArcView 3.2 was used to create trackline navigation layers that were used in the final ArcView 8.1 map documents.
Process_Date: 2003
Process_Step:
Process_Description:
Open-file preparation: No processing has been done to the SEG-Y data files provided on this Digital Versatile Disc (DVD). The data were displayed as 8-bit grayscale Postscript files using the Seismic Unix 'psimage' algorithm. The Postscript images were then converted to GIF images.
Process_Date: 2003
Process_Step:
Process_Description:
Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog.
Process_Date: 20170124
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Alan O. Allwardt
Contact_Position: Contractor -- Information Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Contact_Voice_Telephone: 831-460-7551
Contact_Facsimile_Telephone: 831-427-4748
Contact_Electronic_Mail_Address: aallwardt@usgs.gov
Process_Step:
Process_Description:
Added keywords section with USGS persistent identifier as theme keyword.
Process_Date: 20201013
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Spatial_Data_Organization_Information:
Indirect_Spatial_Reference:
Horizontal X and Y locations (both Zone 15 UTMs and latitude and longitude) for each shot location are provided in ASCII position files, along with the time the shot was recorded in Greenwich Mean Time.
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000009
Longitude_Resolution: 0.000009
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: WGS84
Ellipsoid_Name: WGS84
Semi-major_Axis: 6378137
Denominator_of_Flattening_Ratio: 298.25722
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
Binary data file: Each profile is available as a binary file in Society of Exploration Geophysicists (SEG) SEG-Y format. A SEG-Y file consists of 1) a 3,200-byte file identification record of ASCII-formatted general information, 2) a 400-byte binary record with information such as sample rate and record length specific to the data set, and 3) multiple records, with one seismic reflection trace per record for boomer data. Each trace record is preceded by a 240-byte trace header containing information such as trace number and acquisition day and time specific to each trace. The trace data are represented as a time series of unitless 16-bit integer or 32-bit real numbers proportional to the reflection coefficient. The SEG-Y file is useful only if you have access to specialized software designed to process and display seismic reflection data. These SEG-Y files have a .TRA extension and range in size from 932 KB to 68.863 MB.
Entity_and_Attribute_Overview:
Graphic Image File: Each profile is available as a GIF image. The trackline maps provided are JPEG images that contain hotlinks to the seismic profile GIF images. The profiles range in size from 53 KB to 4.1 MB.
Entity_and_Attribute_Detail_Citation:
Barry, K.M., Cavers, D.A., and Kneale, C.W., 1975, Recommended standards for digital tape formats: Geophysics, v. 40, n.2, p. 344-352. Also available online at: <http://www.seg.org/publications/tech-stand/index_body.html>.
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Shawn V. Dadisman
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-803-8747, ext. 3029
Contact_Electronic_Mail_Address: sdadisman@usgs.gov
Contact_Instructions:
Data may be available on-line only by special arrangement with the distributor above.
Resource_Description: U.S. Geological Survey Open-File Report 03-274
Distribution_Liability:
This Digital Versatile Disc (DVD) 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 for the accuracy, completeness, or usefulness of any 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 DVD 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: SEG-Y
Format_Information_Content:
The SEG-Y standard format (Barry et al., 1975) consists of the following: a 3,600-byte reel identification header, with the first 3,200 bytes consisting of an ASCII header block followed by a 400-byte binary header block, both of which include information specific to line and reel number; a trace data block that follows the reel identification header, with the first 240 bytes of each trace block consisting of the binary trace identification header; and seismic data samples that follow the trace identification header.
File_Decompression_Technique: No compression applied
Transfer_Size: 2020
Digital_Transfer_Option:
Offline_Option:
Offline_Media: DVD
Recording_Format: UDF (Universal Disc Format)
Compatibility_Information: UNIX, LINUX, DOS, MAC
Digital_Form:
Digital_Transfer_Information:
Format_Name: ESRI map document, shapefile, metadata
Format_Information_Content:
GIS projects and layers used to create the trackline maps presented in this archive and associated metadata.
File_Decompression_Technique: unzip
Transfer_Size: 24.9
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Digital_Form:
Digital_Transfer_Information:
Format_Name: SEGY data download
Format_Information_Content:
The SEG-Y standard format (Barry et al., 1975) consists of the following: a 3,600-byte reel identification header, with the first 3,200 bytes consisting of an ASCII header block followed by a 400-byte binary header block, both of which include information specific to line and reel number; a trace data block that follows the reel identification header, with the first 240 bytes of each trace block consisting of the binary trace identification header; and seismic data samples that follow the trace identification header.
File_Decompression_Technique: none
Transfer_Size: 2020
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Fees: Available from USGS Information Services. Prices vary.
Ordering_Instructions:
Most open-file reports are available from USGS Information Services, Box 25286, Federal Center, Denver, CO 80225-0046 (telephone: 1-888-ASK-USGS; email: infoservices@usgs.gov).
Technical_Prerequisites:
Use of SEG-Y data requires specialized seismic processing software, such as Unix or Linux-based public domain software Seismic Unix (SU) developed by the Colorado School of Mines Center for Wave Phenomena, which can be downloaded at <http://www.cwp.mines.edu/cwpcodes/index.html>.
Metadata_Reference_Information:
Metadata_Date: 20201013
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Karynna Calderon
Contact_Organization: U.S. Geological Survey
Contact_Position: Geographer, Data Management Group
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-803-8747, ext. 3143
Contact_Electronic_Mail_Address: kcalderon@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

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