Sound Velocity Profiles, Odim MVP 30 sound velocity profile data, USGS field activity 2017-003-FA, Mississippi River Delta front offshore of southeastern Louisiana (PNG images, ASVP text, and Esri point shapefile, GCS WGS 84).

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Identification_Information:

Citation:

Citation_Information:

Originator: U.S. Geological Survey
Publication_Date: 2018
Title:

Sound Velocity Profiles, Odim MVP 30 sound velocity profile data, USGS field activity 2017-003-FA, Mississippi River Delta front offshore of southeastern Louisiana (PNG images, ASVP text, and Esri point shapefile, GCS WGS 84).

Edition: 1.0
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/F7X929K6

Publication_Information:

Publication_Place:

Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts

Publisher: U.S. Geological Survey, Coastal and Marine Geology Program

Online_Linkage: https://doi.org/10.5066/F7X929K6
Online_Linkage:

https://www.sciencebase.gov/catalog/item/5a9470d1e4b069906068fbbe

Larger_Work_Citation:

Citation_Information:

Originator: Wayne E. Baldwin
Originator: Seth D. Ackerman
Originator: Charles R. Worley
Originator: William W. Danforth
Originator: Jason D. Chaytor
Publication_Date: 2018
Title:

High-resolution geophysical data collected along the Mississippi River Delta front offshore of southeastern Louisiana, U.S. Geological Survey Field Activity 2017-003-FA

Edition: 1.0
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/F7X929K6

Publication_Information:

Publication_Place: Reston, VA
Publisher: U.S. Geological Survey

Other_Citation_Details:

Suggested citation: Baldwin, W.E., Ackerman, S.D., Worley, C.R., Danforth, W.W., and Chaytor, J.D, 2018, High-resolution geophysical data collected along the Mississippi River Delta front offshore of southeastern Louisiana, U.S. Geological Survey Field Activity 2017-003-FA: U.S. Geological Survey data release, https://doi.org/10.5066/F7X929K6.

Online_Linkage: https://doi.org/10.5066/F7X929K6
Online_Linkage:

https://www.sciencebase.gov/catalog/item/5a8c4bcbe4b00f54eb44044c

Description:

Abstract:

High resolution bathymetric, sea-floor backscatter, and seismic-reflection data were collected offshore of southeastern Louisiana aboard the research vessel Point Sur on May 19-26, 2017, in an effort to characterize mudflow hazards on the Mississippi River Delta front. As the initial field program of a research cooperative between the U.S. Geological Survey, the Bureau of Ocean Energy Management, and other Federal and academic partners, the primary objective of this cruise was to assess the suitability of sea-floor mapping and shallow subsurface imaging tools in the challenging environmental conditions found across delta fronts (for example, variably distributed water column stratification and widespread biogenic gas in the shallow subsurface). Approximately 675 kilometers (km) of multibeam bathymetry and backscatter data, 420 km of towed chirp data, and 550 km of multichannel seismic data were collected. Varied mudflow (gully, lobe), prodelta morphologies, and structural features were imaged in selected survey areas from Pass a Loutre to Southwest Pass.

Purpose:

This dataset is used to display the locations of sound velocity profiles (SVP, also referred to as sound speed profiles), as well as the SVP data, collected during a 2017 USGS cruise along the Mississippi River Delta front. The sound velocity profiles document water column sound speed variability during the cruise, and were used during processing to account for refraction artifacts present within the multibeam bathymetric data. The dataset contains graphs of the sound velocity profile at each station location, as well as location in Geographic Coordinate System (GCS) WGS 84 latitude and longitude, the time of day, and date of collection.

Supplemental_Information:

Additional information on the field activity is available from https://cmgds.marine.usgs.gov/fan_info.php?fan=2017-003-FA.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20170521
Ending_Date: 20170526

Currentness_Reference: ground condition

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned.

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -89.541089
East_Bounding_Coordinate: -88.867156
North_Bounding_Coordinate: 29.375350
South_Bounding_Coordinate: 28.777921

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:5a9470d1e4b069906068fbbe

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Woods Hole Coastal and Marine Science Center
Theme_Keyword: WHCMSC
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: Bureau of Ocean Energy Management
Theme_Keyword: BOEM
Theme_Keyword: moving vessel profiler
Theme_Keyword: shapefile
Theme_Keyword: sound velocity profile
Theme_Keyword: ODIM MVP30
Theme_Keyword: Esri shapefile
Theme_Keyword: field activity number 2017-003-FA
Theme_Keyword: MVP
Theme_Keyword: SVP
Theme_Keyword: SSP
Theme_Keyword: sound speed profile
Theme_Keyword: Marine Geology

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: geoscientificInformation
Theme_Keyword: location

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: sound velocity profiles
Theme_Keyword: sound velocity
Theme_Keyword: ocean sciences
Theme_Keyword: navigational data

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: Gulf of Mexico
Place_Keyword: Southeast Louisiana
Place_Keyword: Mississippi River Delta front
Place_Keyword: Southwest Pass
Place_Keyword: South Pass
Place_Keyword: Pass a Loutre

Temporal:

Temporal_Keyword_Thesaurus: none
Temporal_Keyword: 2017

Access_Constraints: none
Use_Constraints:

Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Wayne E. Baldwin
Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist
Contact_Address:

Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: Massachusetts
Postal_Code: 02543-1598
Country: USA

Contact_Voice_Telephone: 508-548-8700 x2226
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: wbaldwin@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name:

https://www.sciencebase.gov/catalog/file/get/5a9470d1e4b069906068fbbe/?name=2017-003-FA_MVPdata_browse.jpg

Browse_Graphic_File_Description:

Thumbnail image of Mississippi River Delta front sound speed profile locations.

Browse_Graphic_File_Type: JPEG

Data_Quality_Information:

Logical_Consistency_Report:

Sound velocity profiles were acquired with an ODIM MVP30 moving vessel profiler (MVP) from 20170521 to 20170526 (jd 141-146). No sound speed profiles were collected between 14:38 and 18:28 UTC on 20170522 (jd 142) while the MVP30 was inoperable due to cable failure. These data only contain the downcast data collection.

Completeness_Report:

Each sound velocity profile (74 total) collected during cruise 2017-003-FA is represented by an ASVP formated ASCII text file (see description below in the entity and attribute overview section), a PNG image file, and a feature point location in the Esri shapefile. Profiles MVP30__0046 and MVP30__0057 were faulty and excluded during QA/QC processing.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

DGPS navigation data for the sound velocity profiles were acquired using the WGS 84 coordinate system with an Applanix POS MV Wavemaster (model 220, V5) with two AeroAntenna Technologies GPS antennas located at either end of a 2-m baseline, which was oriented fore and aft and mounted atop the MBES pole, approximately midships on the starboard side of vessel. Position data were supplied to the MVP30 topside via a serial connection from HYPACK (17.0.26.0) survey software. While the horizontal position accuracy is thought to be within 0.5 - 2 meters for the DGPS position solutions, we consider the sound velocity profile positions to be within 10 m, since the location of the MVP30 smart winch, which was used to deploy the MVP while underway, approximately 8 meters aft of the MBES pole was not accounted for.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

MVP30 tow fish depths are calculated by the MVP (version 2.391) acquisition software, which converts pressure sensor readings to depth using the standard formulas described in Fofonoff, N.P.and Millard, R.C., Jr., 1988, Algorithms for computation of fundamental properties of seawater, UNESCO Technical Papers in Marine Science, No. 44. The depths are thought to be accurate to within 1 meter.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey
Publication_Date: unpublished material
Title: sound velocity data

Type_of_Source_Media: disc
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20170521
Ending_Date: 20170526

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: raw sound velocity data
Source_Contribution:

Sound velocity profiles were collected using an ODIM MVP30 moving vessel profiler (MVP) mounted on the stern. MVP (version 2.391) acquisition software running on a laptop PC controlled the smart winch and deployment system, allowing free fall deployment of the MVP fish at a user specified time interval while the vessel was underway. An AML Oceanographic MVP X SVPT probe attached to the tow body collected sound velocity, pressure, and temperature data during each deployment. Data were transmitted via the coaxial tow cable to the acquisition PC and data collected during the downcast portions of the deployment were logged to the Kongsberg SIS ASVP ASCII format. Position data were supplied to the MVP30 topside via a serial connection from HYPACK (17.0.26.0) survey software, and logged to the ASVP format files.

Process_Step:

Process_Description:

SVP profile acquisition at sea:
Sound velocity profiles were collected every 1-5 hours and sometimes more frequently using the ODIM MVP30 moving vessel profiler from 20170521 to 20170526 (jd 141-146).
This process step and all subsequent process steps were conducted by the same person - Wayne Baldwin.

Process_Date: 201705
Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Wayne E. Baldwin
Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist
Contact_Address:

Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598

Contact_Voice_Telephone: (508) 548-8700 x2226
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: wbaldwin@usgs.gov

Process_Step:

Process_Description:

Plot the SVP data and import into Spatialite database:
A python script was used to read the ASVP data and plot the sound speed profile as speed of sound (meter/second) versus depth (meters). Position, date, time, and profile id were pulled from the asvp header and written into the image (PNG) for reference. Within the same script, the position, Julian day, time, and profile id were also imported into a Spatialite (version 4.3.0) enabled SQLite (version 3.21.0) database table. The geographic positions were used to create point geometries for the station locations, and additional fields indicating Survey_ID, Vessel_ID, Device_ID, and ImageLink were added.

Process_Date: 201705

Process_Step:

Process_Description:

Create Esri shapefile containing the point data:
The MVP point features were added (Add Data) into ArcMap (version 10.3.1) from the SQLite database, then exported (Right click on database feature class > Data > Export Data) to the new Esri point shapefile 2017-003-FA_MVPdata.shp.

Process_Date: 201711

Process_Step:

Process_Description:

Added keywords section with USGS persistent identifier as theme keyword (20200807). Removed the web services distribution formats in preparation for ScienceBase moving platforms and those services will no longer be available (20260407).

Process_Date: 20260407
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:

Direct_Spatial_Reference_Method: vector
Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: point
Point_and_Vector_Object_Count: 74

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: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: 2017-003-FA_MVPdata
Entity_Type_Definition:

Sound velocity profile locations for survey 2017-003-FA along the Mississippi River Delta front.

Entity_Type_Definition_Source: U.S. Geological Survey

Attribute:

Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: Lon
Attribute_Definition: Decimal degree longitude value in GCS WGS 84.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -89.541089
Range_Domain_Maximum: -88.867156
Attribute_Units_of_Measure: degrees
Attribute_Measurement_Resolution: .000001

Attribute:

Attribute_Label: Lat
Attribute_Definition: Decimal degree latitude value in GCS WGS 84.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 28.777921
Range_Domain_Maximum: 29.37535
Attribute_Units_of_Measure: degrees
Attribute_Measurement_Resolution: .000001

Attribute:

Attribute_Label: MVP
Attribute_Definition:

Name of velocity profile used to distinguish between casts. Profile names beginning with 'MVP30' refer to the MVP30 moving vessel profiler casts (and are followed by cast number - 0001 to 0076).

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values: