Water column acoustic backscatter data from the mouth of the Columbia River, Oregon and Washington, 2013

Metadata also available as - [Questions & Answers] - [Parseable text] - [XML]

Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Andrew W. Stevens
Originator: Guy Gelfenbaum
Originator: Jamie MacMahan
Originator: Ad J.H.M. Reniers
Originator: Edwin P. Elias
Originator: Christopher R. Sherwood
Originator: Emily M. Carlson
Publication_Date: 2017
Title:

Water column acoustic backscatter data from the mouth of the Columbia River, Oregon and Washington, 2013

Geospatial_Data_Presentation_Form: NetCDF files
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/F7NG4NS1

Publication_Information:

Publication_Place:

Pacific Coastal and Marine Science Center, Santa Cruz, California

Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.5066/F7NG4NS1
Online_Linkage:

https://www.sciencebase.gov/catalog/file/get/590b751ce4b0e541a0378cba

Larger_Work_Citation:

Citation_Information:

Oceanographic measurements and hydrodynamic modeling of the mouth of the Columbia River, Oregon and Washington, 2013

Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/F7NG4NS1

Publication_Information:

Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA
Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.5066/F7NG4NS1

Description:

Abstract:

Spatial surveys of water column acoustic backscatter were performed between May 28 and June 2, 2013, in the mouth of the Columbia River, Oregon and Washington. These data were collected using a Biosonics DTX single-beam echosounder with 430 kHz transducer.

Purpose:

These water column acoustic backscatter data were collected as a part of a larger investigation into hydrodynamics in the mouth of the Columbia River, Oregon and Washington.

Supplemental_Information:

Information about the data collection field activities can be found at: https://cmgds.marine.usgs.gov/fan_info.php?fan=S0313WO

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20130528
Ending_Date: 20130602

Currentness_Reference: ground condition at time data were collected

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None Planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -124.029598
East_Bounding_Coordinate: -123.987173
North_Bounding_Coordinate: 46.267905
South_Bounding_Coordinate: 46.238508

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:590b751ce4b0e541a0378cba

Theme:

Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Water Column Features

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: marine water quality

Theme:

Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: physical oceanography

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: Pacific Coastal and Marine Science Center
Theme_Keyword: PCMSC

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: Oceans
Theme_Keyword: geoscientificInformation

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Columbia River
Place_Keyword: Pacific County
Place_Keyword: Clatsop County
Place_Keyword: State of Washington
Place_Keyword: State of Oregon

Access_Constraints: none
Use_Constraints:

USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Andrew W. Stevens
Contact_Organization:

U.S. Geological Survey, Pacific Coastal and Marine Science Center

Contact_Position: Oceanographer
Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060-5792
Country: USA

Contact_Voice_Telephone: 831-460-7424
Contact_Facsimile_Telephone: 831-427-4748
Contact_Electronic_Mail_Address: astevens@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name:

https://www.sciencebase.gov/catalog/file/get/590b751ce4b0e541a0378cba?name=mcr13_biosonics_map.png&allowOpen=true

Browse_Graphic_File_Description: Map showing locations of survey transects
Browse_Graphic_File_Type: PNG

Browse_Graphic:

Browse_Graphic_File_Name:

https://www.sciencebase.gov/catalog/file/get/590b751ce4b0e541a0378cba?name=mcr13_biosonics_ex.png&allowOpen=true

Browse_Graphic_File_Description:

Image showing water column backscatter data from one of the transects surveyed at three different stages of the tide cycle

Browse_Graphic_File_Type: PNG

Native_Data_Set_Environment: Matlab version 9.0.0.341360 running on Microsoft Windows 7
Cross_Reference:

Citation_Information:

Originator: International Hydrographic Organization (IHO)
Publication_Date: 2008
Title: IHO standards for hydrographic surveys (5th ed.)
Geospatial_Data_Presentation_Form: PDF
Publication_Information:

Publication_Place: Monaco
Publisher: International Hydrographic Bureau Special Publication 44, 28p.

Online_Linkage: https://www.iho.int/iho_pubs/standard/S-44_5E.pdf

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: No formal attribute accuracy tests were conducted.

Logical_Consistency_Report: Data fall within expected ranges.
Completeness_Report:

Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the metadata for each part of this data release carefully for additional details.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Manufacturer reported accuracy for the differentially corrected horizontal positions for the Trimble R7 rover trajectories is 0.8 cm + 0.5 ppm. Baselines from the GNSS base station were typically less than 5 km, suggesting a horizontal accuracy of survey-vessel positions to be 0.825 cm.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Manufacturer reported accuracy for the differentially corrected vertical positions for the Trimble R7 rover trajectories is 1.5 cm + 1 ppm. Baselines from the GNSS base station were typically less than 5 km, suggesting the vertical accuracy of survey vessel positions to be 2 cm relative to the base station coordinate. Additional uncertainty in the final computed elevations data is related to unmeasured variability in the speed of sound used to compute depths from bathymetric soundings and, thus, are depth-dependent. Based on analysis of all available speed of sound measurements, we estimate uncertainties in the final depth soundings to be 1 percent of the water depth. The total vertical uncertainty is calculated using Equation 1: sigmat=sqrt(a^2+(b×d)^2), where sigmat is the total vertical uncertainty, a is the uncertainty of the GNSS vertical position, b is the depth-dependent uncertainty factor (0.01), and d is water depth (International Hydrographic Organization, 2008). Maximum water depths surveyed on this mapping mission are approximately 35 m yielding a maximum total vertical uncertainty of 37 cm. Uncertainty in the vertical positions associated with pitch and roll of the survey vessels is unknown.

Lineage:

Process_Step:

Process_Description:

A total of 62 km of tracklines were surveyed with a Biosonics single-beam echosounder in the mouth of the Columbia River (MCR) between May 28 and June 2, 2013. Several cross-channel transects were surveyed repeatedly to characterize changes in water column acoustic backscatter amplitude at different stages of the tide cycle. Measurements of acoustic backscatter amplitude in the water column were collected using a Biosonics single-beam echosounder with a 430 kHz transducer pole-mounted to the R/V Park Snavely. A Trimble R7 global navigation satellite system (GNSS) receiver and Trimble Zephyr Model 2 GNSS antenna was used to provide positioning during the surveys. Real-time differential corrections from the Washington State Reference Network (http://www.wsrn3.org/) were applied to achieve survey-grade horizontal and vertical GNSS positions while the vessel was underway. Biosonics Visual Acquisition software (version 6.1.0.7382) was used for data acquisition and merging of the acoustic and positioning data. Raw backscatter data from each ping were digitized with an analog to digital converter in the echosounder at a rate of 41667 Hz, resulting in a profile of acoustic backscatter counts versus depth at intervals of 1.8 cm. Raw counts of acoustic backscatter were converted to target strength assuming a seawater absorption coefficient of 0.085 dB/m, a source level of 216 dB re 1 microPa m, and receiver sensitivity of -61.4 dB/count derived from calibrations performed in a test tank by the manufacturer.

Process_Date: 20130602

Process_Step:

Process_Description: Data were accumulated into NetCDF files.
Process_Date: 20160114

Process_Step:

Process_Description:

Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed.

Process_Date: 20201019
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:

Data were collected continuously along survey transects. Refer to self-contained NetCDF files for more location information.

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.000001
Longitude_Resolution: 0.000001
Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257223563

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

NetCDF files are self-contained and attribute information may be found in the header of the file itself.

Entity_and_Attribute_Detail_Citation:

The entity and attribute information was generated by the individual and/or agency identified as the originator of the data set. Please review the rest of the metadata record for additional details and information.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey - ScienceBase

Contact_Address:

Address_Type: Mailing and Physical Address
Address: Denver Federal Center, Building 810, Mail Stop 302
City: Denver
State_or_Province: CO
Postal_Code: 80225
Country: USA

Contact_Voice_Telephone: 1-888-275-8747
Contact_Electronic_Mail_Address: sciencebase@usgs.gov

Resource_Description:

Downloadable data in NetCDF format. NetCDF were compressed in zip files (e.g. mcr13_XXXX..., where XXXX is the MMDD) for each day of survey operations.

Distribution_Liability:

Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), 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 constitute any such warranty.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: NetCDF
Format_Version_Number: Matlab 9.0.0.341360
Format_Information_Content:

Zip file contains vessel-mounted ADCP data in NetCDF format for data collected on May 29, 2013

File_Decompression_Technique: zip archive
Transfer_Size: 342.03

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://www.sciencebase.gov/catalog/file/get/590b751ce4b0e541a0378cba?name=mcr13_0529_backscatter.zip

Network_Resource_Name: https://doi.org/10.5066/F7NG4NS1

Access_Instructions: Data may be accessed and downloaded via the Internet

Digital_Form:

Digital_Transfer_Information:

Format_Name: NetCDF
Format_Version_Number: Matlab 9.0.0.341360
Format_Information_Content:

Zip file contains vessel-mounted ADCP data in NetCDF format for data collected on June 2, 2013

File_Decompression_Technique: zip archive
Transfer_Size: 447.51

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://www.sciencebase.gov/catalog/file/get/590b751ce4b0e541a0378cba?name=mcr13_0602_backscatter.zip

Network_Resource_Name: https://doi.org/10.5066/F7NG4NS1

Access_Instructions: Data may be accessed and downloaded via the Internet

Digital_Form:

Digital_Transfer_Information:

Format_Name: NetCDF
Format_Version_Number: Matlab 9.0.0.341360
Format_Information_Content:

Zip file contains vessel-mounted ADCP data in NetCDF format for data collected on May 28, 2013

File_Decompression_Technique: zip archive
Transfer_Size: 671.56

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://www.sciencebase.gov/catalog/file/get/590b751ce4b0e541a0378cba?name=mcr13_0528_backscatter.zip

Network_Resource_Name: https://doi.org/10.5066/F7NG4NS1

Access_Instructions: Data may be accessed and downloaded via the Internet

Digital_Form:

Digital_Transfer_Information:

Format_Name: NetCDF
Format_Version_Number: Matlab 9.0.0.341360
Format_Information_Content:

Zip file contains vessel-mounted ADCP data in NetCDF format for data collected on May 31, 2013

File_Decompression_Technique: zip archive
Transfer_Size: 715.66

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://www.sciencebase.gov/catalog/file/get/590b751ce4b0e541a0378cba?name=mcr13_0531_backscatter.zip

Network_Resource_Name: https://doi.org/10.5066/F7NG4NS1

Access_Instructions: Data may be accessed and downloaded via the Internet

Digital_Form:

Digital_Transfer_Information:

Format_Name: NetCDF
Format_Version_Number: Matlab 9.0.0.341360
Format_Information_Content:

Zip file contains vessel-mounted ADCP data in NetCDF format for data collected on June 1, 2013

File_Decompression_Technique: zip archive
Transfer_Size: 1480.0

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://www.sciencebase.gov/catalog/file/get/590b751ce4b0e541a0378cba?name=mcr13_0601_backscatter.zip

Network_Resource_Name: https://doi.org/10.5066/F7NG4NS1

Access_Instructions: Data may be accessed and downloaded via the Internet

Digital_Form:

Digital_Transfer_Information:

Format_Name: png
Format_Version_Number: Matlab 9.0.0.341360
Format_Information_Content:

PNG image showing example of water column acoustic backscatter data at various stages throughout the tide cycle

File_Decompression_Technique: none
Transfer_Size: 1.59

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://www.sciencebase.gov/catalog/file/get/590b751ce4b0e541a0378cba?name=mcr13_backscatter_ex.png

Network_Resource_Name: https://doi.org/10.5066/F7NG4NS1

Access_Instructions: Data may be accessed and downloaded via the Internet

Digital_Form:

Digital_Transfer_Information:

Format_Name: png
Format_Version_Number: Matlab 9.0.0.341360
Format_Information_Content:

PNG image showing locations of water column acoustic backscatter data

File_Decompression_Technique: none
Transfer_Size: 1.88

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://www.sciencebase.gov/catalog/file/get/590b751ce4b0e541a0378cba?name=mcr13_backscatter_map.png

Network_Resource_Name: https://doi.org/10.5066/F7NG4NS1

Access_Instructions: Data may be accessed and downloaded via the Internet

Fees: None

Metadata_Reference_Information:

Metadata_Date: 20201019
Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Andrew W. Stevens
Contact_Organization:

U.S. Geological Survey, Pacific Coastal and Marine Science Center

Contact_Position: Oceanographer
Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Country: USA

Contact_Voice_Telephone: 831-460-7424
Contact_Facsimile_Telephone: 831-427-4748
Contact_Electronic_Mail_Address: astevens@usgs.gov

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/ScienceBase/DR_F7NG4NS1/mcr13_backscatter_metadata.html>