All sound velocity profile data were collected during USGS field activity 2011-005-FA using an Odim Brooke Ocean MVP30. Quality control was conducted during processing of the data; any spurious data were removed.
This shapefile contains 135 sound velocity profiles collected JD140 (05/20/2011) - JD149 (05/29/2011) during USGS field activity 2011-005-FA. No sound velocity profiles were collected after JD149 due to a system failure of the Odim Brooke Ocean MVP30. Only SWATHPlus interferometric sonar lines L1f1 - L47F5 were processed using the 135 acquired sound velocity profiles.
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: Unpublished Material
Title: Sound Velocity Profile Data
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20110520
Ending_Date: 20110529
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: none
Source_Contribution:
Survey: Survey lines were run at an average speed of 5 knots. Lines 1 through 27 were run at a 75-m line spacing to achieve full coverage of the seafloor in a priority area of interest in the nearshore, in water depths less than 15 meters. Lines 28 through 109 were run at a 150-m line spacing, with the exception of tie lines (lines 52 through 60, 65 through 67, 89 through 92), which were run at approximately a 2-km line spacing.
Sonar: Swath-bathymetric and acoustic-backscatter data were acquired with a SEA, Ltd., SWATHplus-M interferometric sonar operating at a frequency of 234 kHz and a variable range (increased or decreased manually depending on water depth). The system was operated with a transmit power: 80 percent, 4096 samples per channel, and a variable range (increased or decreased depending on water depth). The SWATHplus-M was mounted on the port side of the M/V Scarlett Isabella during survey operations. A Coda Octopus F180R Attitude and Positioning system recorded ship motion (heave, pitch, roll, and yaw). These data were transmitted via network connection to the SWATHplus-M acquisition software. The Octopus F180R Inertial Measurement Unit (IMU) was mounted directly above the SEA SWATHplus-M transducers, to minimize lever arm offsets that can lead to positioning errors. The F180R uses two L1 antennas for position and heading accuracy. The antennas are mounted on a rigid horizontal pole, positioned at the top of the sidemount, with a horizontal separation of 1 meter and are offset from the IMU in a forward/aft configuration. The forward offset of the primary antenna from the IMU is 0.5 meters, with no port/starboard offset.
Sound Velocity Profiles: 135 sound velocity profiles were acquired during survey operations at roughly 1 to 3 hour intervals using an Odim Brooke Ocean MVP30 motion vessel profiler. The MVP30 failed during survey operations. Sound velocity profiles were only collected during JD140 through 149 (lines 1 through 47).
Process_Step:
Process_Description:
135 Sound velocity profiles were collected every 1-3 hours using an Odim Brooke Ocean Moving Vessel Profiler (MVP30) (see
http://www.brooke-ocean.com/mvp_main.html for details). A computer controlled smart winch and deployment system allows the free fall fish to be deployed while the vessel is underway at a user specified time interval. A Sitex DepthFinder informs the MVP of the approximate water depth at time of deployment to ensure that the fish does not make contact with the seafloor. The sound velocity data are written to Kongsberg SIS format ASCII files (.asvp and *.asc).
Jane F. Denny performed this and all subsequent process steps.
Contact_Information:
Contact_Person_Primary:
Contact_Person: Jane F. Denny
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: MA
Postal_Code: 02543
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2311
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: jdenny@usgs.gov
Process_Step:
Process_Description:
The ASVP data are parsed to comma-delimited text format using an AWK script, maintaining the header information (filename, date, time, location, depth and speed of sound).
The ASC data, containing only depth and speed of sound, were imported to Microsoft Excel (2010) where individual plots were generated for each sound velocity profile and saved as PNG files. Depth in meters is plotted along the Y-axis and speed of sound in meters per second is plotted along the X-axis of each graph.
Process_Date: 2014
Process_Step:
Process_Description:
The location of each sound velocity profile in eastings and northings (UTM, Zone 18N, meters, WGS84) was saved to a comma-separated value file (*.csv) along with file name, date, position, depth and julian day. Proj (version 4.6.1) was used to convert the eastings and northings to latitude and longitude. Awk and paste were used to merge the proj output with the original comma-separated value file, creating a new csv file containing filename, date, time, position, depth and julian day.
Process_Date: 2014
Process_Step:
Process_Description:
The text file (*.csv) was imported into ArcGIS 9.3 using Tools - Add XY Data and converted to an event theme. The event theme was then saved to a point shapefile and the projection was defined as Geographic Coordinate System, WGS84 (GCS_WGS_1984). The following fields were manually added to the attribute table: survey, Acq_System, and Ship.
Process_Date: 2014
Process_Step:
Process_Description:
The online links to the data were updated to reflect the new server hosting the data. Additionally, other small edits could be made to the metadata, such as modifying http to https where appropriate. The metadata date (but not the metadata creator) was edited to reflect the date of these changes.
Process_Date: 20170418
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
Process_Step:
Process_Description: USGS Thesaurus keywords added to the keyword section.
Process_Date: 20180720
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
Process_Step:
Process_Description:
Added keywords section with USGS persistent identifier as theme keyword.
Process_Date: 20200908
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
