Multibeam backscatter data collected in Nantucket Sound Massachusetts in the vicinity of Horseshoe Shoal, during USGS Field Activity 2022-001-FA using a Teledyne SeaBat Integrated Dual-Head (IDH) T20-P multibeam echosounder (8-bit GeoTIFF, UTM Zone 19N, WGS 84, 1-m resolution)

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

Identification_Information:

Citation:

Citation_Information:

Originator: Brian D. Andrews
Publication_Date: 20230309
Title:

Multibeam backscatter data collected in Nantucket Sound Massachusetts in the vicinity of Horseshoe Shoal, during USGS Field Activity 2022-001-FA using a Teledyne SeaBat Integrated Dual-Head (IDH) T20-P multibeam echosounder (8-bit GeoTIFF, UTM Zone 19N, WGS 84, 1-m resolution)

Edition: 1.0
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P9O5G5OT

Publication_Information:

Publication_Place:

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

Publisher:

U.S. Geological Survey, Coastal and Marine Hazards and Resources Program

Online_Linkage: https://doi.org/10.5066/P9O5G5OT
Online_Linkage:

https://www.sciencebase.gov/catalog/item/63eb9bf7d34efa0476af1f7a

Larger_Work_Citation:

Citation_Information:

Originator: Brian D. Andrews
Originator: Wayne E. Baldwin
Originator: Charles R. Worley
Originator: Eric M. Moore
Originator: Alex R. Nichols
Originator: William W. Danforth
Originator: David S. Foster
Originator: Seth D. Ackerman
Originator: Laura L. Brothers
Publication_Date: 2023
Title:

High-resolution geophysical data collected in Nantucket Sound Massachusetts in the vicinity of Horseshoe Shoal, during USGS Field Activity 2022-001-FA

Edition: 1.0
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P9O5G5OT

Publication_Information:

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

Other_Citation_Details:

Suggested citation: Andrews, B.D., Baldwin, W.E., Worley, C.R., Moore, E.M., Nichols, A.R., Danforth, W.W., Foster, D.S., Ackerman, S.D., and Brothers, L.L. 2023, High-resolution geophysical data collected in Nantucket Sound Massachusetts in the vicinity of Horseshoe Shoal, during USGS Field Activity 2022-001-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P9O5G5OT

Online_Linkage: https://doi.org/10.5066/P9O5G5OT
Online_Linkage:

https://www.sciencebase.gov/catalog/item/63e3e041d34e9fa19a9bb703

Description:

Abstract:

In June 2022, the U.S. Geological Survey, in collaboration with the Massachusetts Office of Coastal Zone Management, collected high-resolution geophysical data, in Nantucket Sound to understand the regional geology in the vicinity of Horseshoe Shoal. This effort is part of a long-term collaboration between the USGS and the Commonwealth of Massachusetts to map the State’s waters, support research on the Quaternary evolution of coastal Massachusetts, resolve the influence of sea-level change and sediment supply on coastal evolution, and strengthen efforts to understand the type, distribution, and quality of subtidal marine habitats. This collaboration produces high-resolution geologic data that serve the needs of research, management, and the public. Data collected as part of this mapping cooperative continue to be released in a series of USGS Open-File Reports and Data Releases https://www.usgs.gov/centers/whcmsc/science/geologic-mapping-massachusetts-seafloor.

Purpose:

The purpose of this backscatter mosaic is to measure the relative acoustic reflectance (backscatter) values of the seafloor. This mosaic provides information on surficial sediments of the seafloor in the vicinity of Horseshoe Shoal.

Supplemental_Information:

Support for 2022-001-FA was provided to the USGS from the Massachusetts Office of Coastal Zone Management. Approximately 686 linear kilometers of multibeam echosounder data were collected during 13 survey days along tracklines spaced 87 or 52 meters apart. Data were collected using the R/V Rafael, owned and operated by the USGS Woods Hole Coastal and Marine Science Center. Additional information on the field activity is available from https://cmgds.marine.usgs.gov/fan_info.php?fan=2022-001-FA.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20220603
Ending_Date: 20220621

Currentness_Reference:

data were collected on the following dates: 20220603-20220607 (Julian day 154-158), 20220610-20220614 (Julian day 161-165), 20220620-20220621 (Julian day 171-172). No usable bathymetry or backscatter data were collected on 20220624 (Julian Day 175).

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -70.488456
East_Bounding_Coordinate: -70.268961
North_Bounding_Coordinate: 41.573616
South_Bounding_Coordinate: 41.495383

Keywords:

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 Hazards and Resources Program
Theme_Keyword: CMHRP
Theme_Keyword: Department of the Interior
Theme_Keyword: DOI
Theme_Keyword: Massachusetts Office of Coastal Zone Management
Theme_Keyword: CZM
Theme_Keyword: MassCZM
Theme_Keyword: field activity number 2022-001-FA
Theme_Keyword: R/V Rafael
Theme_Keyword: GeoTIFF
Theme_Keyword: multibeam echosounder
Theme_Keyword: multibeam backscatter
Theme_Keyword: backscatter
Theme_Keyword: time-series
Theme_Keyword: Reson
Theme_Keyword: Teledyne
Theme_Keyword: T20-P
Theme_Keyword: Marine Geology

Theme:

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

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: multibeam sonar
Theme_Keyword: sea-floor acoustic reflectivity
Theme_Keyword: marine geophysics
Theme_Keyword: marine geology
Theme_Keyword: geospatial datasets

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:63eb9bf7d34efa0476af1f7a

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: United States of America
Place_Keyword: Atlantic Ocean
Place_Keyword: Nantucket Sound
Place_Keyword: Horseshoe Shoal
Place_Keyword: Eldridge Shoal
Place_Keyword: Succonnesset Shoal
Place_Keyword: Wreck Shoal
Place_Keyword: Massachusetts

Stratum:

Stratum_Keyword_Thesaurus: None
Stratum_Keyword: sea floor
Stratum_Keyword: seafloor

Temporal:

Temporal_Keyword_Thesaurus: none
Temporal_Keyword: 2022

Access_Constraints: none
Use_Constraints:

Public domain data from the U.S. Government are freely re-distributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset. These data are not to be used for navigation.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Brian Andrews

Contact_Position: Geographer
Contact_Address:

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

Contact_Voice_Telephone: 508-548-8700 x2348
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: bandrews@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name:

https://www.sciencebase.gov/catalog/file/get/63eb9bf7d34efa0476af1f7a?name=2022-001-FA_TeledyneT20P_Backscatter_1m_browse.jpg

Browse_Graphic_File_Description:

Thumbnail image of 1-m multibeam echosounder backscatter data collected within Nantucket Sound Massachusetts in the vicinity of Horseshoe Shoal, during USGS Field Activity 2022-001-FA.

Browse_Graphic_File_Type: JPEG

Data_Quality_Information:

Logical_Consistency_Report:

This raster mosaic represents processed dual-head Teledyne SeaBat T20-P multibeam echosounder (MBES) backscatter data gridded at 1-m resolution. Quality control and data processing were conducted to remove spurious points and reduce sound speed artifacts (refraction) using Qimera (v. 2.5) multibeam processing software.

Completeness_Report:

Data collected along sonar calibration lines and cross lines used for data quality checks are not included in this mosaic, however, the trackline navigation for all lines are included in the 2022-001-FA_TeledyneT20P_Tracklines.shp shapefile included in this publication.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Navigation data were acquired using the WGS 84 coordinate system with an Applanix POS MV Wavemaster (model 220, V5), which utilizes multiple GNSS satellite and acceleration data from a Motion Reference Unit (MRU) and GNSS azimuthal heading. The POS MV was configured with two AeroAntenna Technologies GNSS antennas located at either end of a 2-m baseline, which was oriented athwartship and mounted atop the after end of the cabin. DGPS positions were obtained from the primary antenna located on the starboard end of the baseline, and the positional offsets between the antenna and the navigational reference point (the POS MV IMU) were accounted for in the Applanix POSView (version 11.00) acquisition software. DGPS positions are horizontally accurate to 0.5 - 2 meters, but accuracy can increase to less than 10 cm after post-processing with Applanix POSPac (version 8.8).

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey
Publication_Date: Unpublished Material
Title: raw MBES data in Teledyne .s7k format
Geospatial_Data_Presentation_Form: digital data

Type_of_Source_Media: disc
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20220603
Ending_Date: 20220621

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: RAW Teledyne T20-P MULTIBEAM ECHOSOUNDER FILES
Source_Contribution:

Multibeam echosounder (MBES) bathymetry and backscatter data were collected using integrated, dual-head Teledyne T20-P sonars. The pair of mills cross transmit and receive arrays were mounted side-by-side within a bracket that oriented them at opposing 30-degree angles (relative to horizontal). The bracket was pole-mounted on the starboard side of the R/V Rafael so that the sonar arrays were oriented athwart ships (primary and secondary arrays facing outward and down to port and starboard, respectively) and located approximately 1.215 m below the waterline when deployed. Vessel navigation and attitude data were acquired using an Applanix POS MV Wavemaster (model 220, V5) configured with two AeroAntenna Technologies GNSS antennas located at either end of a 2-m baseline, which was oriented athwartship and mounted atop the after end of the cabin, and the wetpod MRU mounted atop the sonar bracket just aft of the pole. An AML Micro X SV mounted on the sonar bracket monitored sound speed near the sonars during acquisition, and AML-3LGR or Minos X CTDSV profilers were used to collect water column sound speed profiles 3 to 7 times each survey day. The Teledyne SeaBat User Interface (version 5.2.0.1) was used to control the sonars, which were operated in intermediate mode at full power (220 dB), with frequency-modulated pulse at 400 kHz. The range of the 1024 across track beams formed by the sonars were adjusted manually depending on water depth and resulted in combined swath widths of 50 to 300 meters or typically 3 to 6 times the water depth. Data were monitored and recorded using the Teledyne SeaBat User Interface (UI) (version 5.2.0.1) and Hypack/Hysweep (v. 2022). The SeaBat User Interface logged the navigation, attitude, bathymetry, time-series backscatter (using the normalized backscatter datagram) , and water column data to s7k format files for each sonar into one, integrated s7k file. The s7k line files were created by the Teledyne UI using the following naming convention: YYYYMMDD_HHMMSS.

Process_Step:

Process_Description:

PROCESSING STEP 1: QIMERA DATA PROCESSING.
Multibeam bathymetry processing within Qimera multibeam processing software (version 2.5.0) during the survey consisted of the following workflow:
1) A new Qimera project was created with projection information set to Universal Transverse Mercator (UTM) Zone 19N, WGS 84. The s7k files for each Julian day were imported to the project using the Source/add raw sonar files menu.
2) A Vessel configuration file was created with the linear and angular installation offsets for each T20-P sonar head as well as vendor specified uncertainty values for each of the survey sensors.
3) Sound Velocity profiles for each day were imported and converted to Qimera using the Source/import/Caris svp menu. Each profile was reviewed for incorrect records using the SVP editor. Incorrect records near the surface or within the water column were flagged using the "reject selection" context menu.
4) Predicted Tides from the Woods Hole, MA tidal station (id 8447930) for the month of June, were downloaded and imported using the Source/Add Tide Files menu. Predicted tides were referenced to Mean Lower Low Water (MLLW) at 6-minute intervals.
5) Delayed heave data from the raw POS MV files (.000) were used to update raw sonar lines using the Source/add binary navigation menu function.
6) The Processing Settings Editor was used to establish the following:
a) Sound velocity Strategy: nearest in time, Use first entry as raytrace profile.
b) Position, Motion, and Heading Source Priorities: were set position 1, Motion 1, and Motion 1 respectively.
c) Vertical Referencing was set to the Woods Hole predicted Tide file.
d) Blocking filters were set to Across Track = 0-to-80 meters on each sonar head. Colinearity Fail was also selected.
7)Each raw sonar file was processed using the settings described above.
The contact person for this and all subsequent processing steps below is Brian Andrews.

Process_Date: 202206
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Brian Andrews

Contact_Position: Geographer
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 x2348
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: bandrews@usgs.gov

Process_Step:

Process_Description:

PROCESSING STEP 2: APPLY POST PROCESSED SBET FILES AND EDIT SOUNDINGS.
Post-survey processing within Qimera (version 2.5.0) consisted of the following workflow:
1) Post-processed navigation, vessel attitude, and GNSS height data from POSPac Smoothed Best Estimate of Trajectory (SBET) files, and post-processed RMS attitude error data from POSPac smrmsg files were used to update each Sonar file using the Source/Add Binary Navigation Files function. The SBET files were referenced using the WGS 84 Ellipsoid (meters).
2) Once the sbet and smrmsg files were imported for each raw sonar file, the Processing Settings Editor was used to replace the attitude and tide referencing data using the following settings:
a) Position, Motion, and Heading Source Priorities were superseded by "sbet" file.
b) Vertical Referencing Method was set to "RTK (Accurate Height)" using the "sbet" file.
3) Each processed s7k file was exported to a generic sensor format (gsf) for creating the backscatter mosaic in FMGT software. The Export/Raw Sonar/Export To GSF menu was used with the "Include raw backscatter imagery" and "flag all filtered soundings as manual edits" options selected.

Process_Date: 202211
Source_Produced_Citation_Abbreviation: "filename.gsf"

Process_Step:

Process_Description:

PROCESSSING STEP 3: IMPORT GSF FILES INTO QPS FMGT SOFTWARE.
1) Create a new QPS FMGT (ver. 7.10.1) Project using the UTM 19, WGS 84 coordinate system. Processing parameters were set to use the "Reson SeaBat T20P Focused MBES".
2) Import each of the integrated gsf files containing data from both heads into the project by Julian day folder. All settings were checked for the "adjust" processing section in FMGT.
3) Filter settings used a flat Angle Varying Gain (AVG) algorithm and 300 AVG window size.

Process_Date: 20221203

Process_Step:

Process_Description:

PROCESSSING STEP 4: CREATE TIME SERIES BACKSCATTER MOSAIC AND EXPORT AS GEOTIFF.
1) Create a 1-meter resolution mosaic using the "Beam Time Series" and "Blend" options.
2) The mosaic was exported as an 8-bit grayscale geotiff at 1-m resolution.

Process_Date: 20221203
Source_Produced_Citation_Abbreviation: 2022-001-FA_TeledyneT20P_Backscatter_1m.tif

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:

Raster_Object_Type: Pixel
Row_Count: 10242
Column_Count: 18434
Vertical_Count: 1

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:

UTM_Zone_Number: 19N
Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -69
Latitude_of_Projection_Origin: 0
False_Easting: 500000
False_Northing: 0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:

Abscissa_Resolution: 1.0
Ordinate_Resolution: 1.0

Planar_Distance_Units: meters

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:

Overview_Description:

Entity_and_Attribute_Overview: No data value is 0.
Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

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
Address: Building 810
Address: Mail Stop 302
City: Denver
State_or_Province: CO
Postal_Code: 80225

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

Resource_Description:

Multibeam backscatter data collected in Nantucket Sound Massachusetts in the vicinity of Horseshoe Shoal, during USGS Field Activity 2022-001-FA using a dual-head Teledyne T20-P multibeam echosounder: includes the GeoTIFF image 2022-001-FA_TeledyneT20P_Backscatter_1m.tif, the browse graphic 2022-001-FA_TeledyneT20P_Backscatter_1m_browse.jpg, and Federal Geographic Data Committee (FGDC) Content Standards for Digital Geospatial Metadata (CSDGM) metadata file (2022-001-FA_TeledyneT20P_Backscatter_1m_meta.xml).

Distribution_Liability:

Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), and have been processed successfully on a computer system at the USGS, no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: GeoTIFF
Format_Version_Number: FMGT (v. 7.10,1)
Format_Specification: 8-bit GeoTIFF file
Format_Information_Content:

GeoTIFF file derived from MBES backscatter data collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center and the associated metadata.

File_Decompression_Technique: Use any zip decompression utility
Transfer_Size: 42

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://www.sciencebase.gov/catalog/item/63eb9bf7d34efa0476af1f7a

Network_Resource_Name:

https://www.sciencebase.gov/catalog/file/get/63eb9bf7d34efa0476af1f7a

Network_Resource_Name: https://doi.org/10.5066/P9O5G5OT

Access_Instructions:

The first link is to the page containing the data, the second link downloads all data available from the page as a zip file, and the third link is to the publication landing page.

Digital_Form:

Digital_Transfer_Information:

Format_Name: WMS
Format_Version_Number: v 1.3.0
Format_Information_Content:

Web Mapping Service (WMS) showing MBES backscatter data collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center and the associated metadata.

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://www.sciencebase.gov/catalogMaps/mapping/ows/63eb9bf7d34efa0476af1f7a?service=wms&request=getcapabilities&version=1.3.0

Network_Resource_Name:

https://www.sciencebase.gov/catalog/file/get/63eb9bf7d34efa0476af1f7a

Network_Resource_Name: https://doi.org/10.5066/P9O5G5OT

Access_Instructions:

The first link in the network resources accesses the data through a web mapping service, the second is to the page containing the data, and the third link is to the publication landing page.

Fees: none

Technical_Prerequisites:

To utilize these data, the user must have software capable of viewing GeoTIFF files.

Metadata_Reference_Information:

Metadata_Date: 20230309
Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Brian Andrews

Contact_Position: Geographer
Contact_Address:

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

Contact_Voice_Telephone: (508) 548-8700 x2348
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: whsc_data_contact@usgs.gov
Contact_Instructions:

The metadata contact email address is a generic address in the event the person is no longer with the USGS.

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time

This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/SB_data_release/DR_P9O5G5OT/2022-001-FA_TeledyneT20P_Backscatter_1m_meta.html>