Text files of the navigation logged with during the sampling survey of field activity 2012-024-FA in 2012 by the U.S. Geological Survey in the Connecticut River

Identification_Information:

Citation:

Citation_Information:

Originator: U.S. Geological Survey
Publication_Date: 2017
Title:

Edition: 1.0
Geospatial_Data_Presentation_Form: tabular digital data
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/F7PG1Q7V

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/F7PG1Q7V
Online_Linkage:

https://cmgds.marine.usgs.gov/data/field-activity-data/2012-024-FA/data/navigation/2012-024-FA_SamplingNav.zip

Larger_Work_Citation:

Citation_Information:

Originator: Seth D. Ackerman
Originator: David S. Foster
Originator: Eric M. Moore
Originator: Barry J. Irwin
Originator: Dann S. Blackwood
Originator: Christopher R. Sherwood
Publication_Date: 2017
Title:

High-Resolution Geophysical and Sampling Data Collected at the Mouth of the Connecticut River, Old Saybrook to Essex, Connecticut, 2012

Edition: 1.0
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/F7PG1Q7V

Publication_Information:

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

Other_Citation_Details:

Suggested citation: Ackerman S.D., Foster D.S., Moore E.M., Irwin B.J., Blackwood D.S., and Sherwood, C.R., 2017, High-resolution geophysical and sampling data collected at the mouth of the Connecticut River, Old Saybrook to Essex, Connecticut, 2012: U.S. Geological Survey data release, https://doi.org/10.5066/F7PG1Q7V.

Online_Linkage: https://doi.org/10.5066/F7PG1Q7V

Description:

Abstract:

A geophysical and geological survey was conducted at the mouth of the Connecticut River from Old Saybrook to Essex, Connecticut, in September 2012. Approximately 230 linear kilometers of digital Chirp subbottom (seismic-reflection) and 234-kilohertz interferometric sonar (bathymetric and backscatter) data were collected along with sediment samples, riverbed photographs, and (or) video at 88 sites within the geophysical survey area. Sediment grab samples were collected at 72 of the 88 sampling sites, video was acquired at 68 sites, and photographs of the river bottom were taken at 38 sites. These survey data are used to characterize the riverbed by identifying sediment-texture and riverbed morphology. More information can be found on the web page for the Woods Hole Coastal and Marine Science Center field activity: https://cmgds.marine.usgs.gov/fan_info.php?fan=2012-024-FA. Data collected during the 2012 survey can be obtained here: https://doi.org/10.5066/F7PG1Q7V.

Purpose:

These raw navigation data are provided as an archive of the navigation data files acquired during the sampling portion of USGS survey 2012-024-FA in the Connecticut River. Survey 2012-024-FA was conducted aboard the R/V Rafael. These data were logged, via serial port input, at a one-second interval using Microsoft HyperTerminal on a Dell Latitude D820 laptop computer.

Supplemental_Information:

More information can be found on the WHCMSC Field Activity webpage: https://cmgds.marine.usgs.gov/fan_info.php?fan=2012-024-FA. Data collected during the 2012 survey can be obtained here: https://doi.org/10.5066/F7PG1Q7V.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20120921
Ending_Date: 20120923

Currentness_Reference: ground condition of survey dates: 20120921-20120923

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -72.4134717
East_Bounding_Coordinate: -72.3349450
North_Bounding_Coordinate: 41.3890983
South_Bounding_Coordinate: 41.2650883

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:a3121a8d-90a2-4207-9ab1-5d0f08ba08fb

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: Woods Hole Coastal and Marine Science Center
Theme_Keyword: WHCMSC
Theme_Keyword: seafloor
Theme_Keyword: sea floor
Theme_Keyword: Marine Geology
Theme_Keyword: field activity 2012-024-FA
Theme_Keyword: field activity number 12024
Theme_Keyword: navigation
Theme_Keyword: nav
Theme_Keyword: survey line
Theme_Keyword: Differential GPS
Theme_Keyword: DGPS
Theme_Keyword: Hemisphere DGPS
Theme_Keyword: R/V Rafael

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: marine geology
Theme_Keyword: navigational data

Theme:

Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: Global Positioning System (GPS) observations
Theme_Keyword: estuary
Theme_Keyword: river

Theme:

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

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: North America
Place_Keyword: United States
Place_Keyword: Atlantic Ocean
Place_Keyword: Connecticut
Place_Keyword: Connecticut River
Place_Keyword: Long Island Sound
Place_Keyword: Old Saybrook
Place_Keyword: Essex

Temporal:

Temporal_Keyword_Thesaurus: None
Temporal_Keyword: 2012

Access_Constraints: None
Use_Constraints:

These data are NOT to be used for navigation. Mariners should refer to the appropriate nautical chart. 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: Seth Ackerman
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
Country: USA

Contact_Voice_Telephone: 508-548-8700 x2315
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: sackerman@usgs.gov

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Some lines of navigation data may be empty or incomplete, especially at the beginning of a file when the first bits of data were being received via serial input.

Logical_Consistency_Report:

These are the original files recorded during the sampling survey. These data were checked but no modifications or corrections have been made to these files.

Completeness_Report:

These files represent all the navigation recorded by during the sample portion of USGS survey 2012-024-FA in the Connecticut River. Temporal and spatial gaps may occur when the navigation data was not being logged or when the GPS signal was temporarily disrupted.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Differential GPS (DGPS) navigation data were collected during the sampling portion of USGS survey 2012-024-FA using the Hemisphere DGPS which had an antenna mounted on the aft of the R/V Rafael's cabin just port of the centerline. Positioning data from this receiver were logged at a one-second interval using Microsoft HyperTerminal on a Dell Latitude D820 laptop computer via serial input. These data were incorporated into the sampling data in post-processing. The DGPS horizontal positional accuracy is estimated to be within 3-5 m.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey
Publication_Date: Unpublished Material
Title: raw navigation data
Geospatial_Data_Presentation_Form: text digital data

Type_of_Source_Media: disc
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20120921
Ending_Date: 20120923

Source_Currentness_Reference: ground condition of survey dates: 20120921-20120923

Source_Citation_Abbreviation: raw navigation data
Source_Contribution:

Raw navigation data from survey 2012-024-FA were logged at a one-second interval using Microsoft HyperTerminal on a Dell Latitude D820 laptop computer. File name convention is vessel_julianday_starttime.TXT.

Process_Step:

Process_Description:

The raw navigation feed from the Hemisphere Differential Global Positioning System (DGPS) receiver was logged at a one-second interval using Microsoft HyperTerminal on a Dell Latitude D820 laptop computer. Log files were recorded for each survey day (by Gregorian day). The filenames are in the format of vessel_julianday_starttime.TXT. For example, filename Rafael_JD265_1702.TXT represents the navigation logged on the R/V Rafael on Julian day 265 beginning at 1702. Times are recorded in UTC (Coordinate Universal Time).

Process_Date: 2012
Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Seth Ackerman
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
Country: USA

Contact_Voice_Telephone: 508-548-8700 x2315
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: sackerman@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

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: point

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:

Overview_Description:

Entity_and_Attribute_Overview:

Not all files contain complete NMEA strings. These are the original files, no corrections have been made to these files. The times recorded in the navigation file are in UTC. The NMEA keywords and the information they provide are as follows:

$GPGGA is GPS fix data in the format: $GPGGA, t, lat, lath, long, longh, q, sat, h, a, M, alt, M, t2, refcheck, where t=time in UTC in the format hhmmss.ss; lat=latitude in the format ddmm.mmmmmm; lath= N or S indicating the latitude hemisphere; long=longitude in the format dddmm.mmmmmm; longh=E or W indicating the hemisphere; q=fix quality where 0=fix not available or invalid; 1=GPS fix; 2=Differential GPS fix; 3=GPS PPS Mode fix; 4=RTK fix; 5=RTK float; sat=number of satellites; h=Horizontal Dilution of Precision (HDOP); a=Antenna altitude above mean sea level (geoid); M= units of antenna altitude in meters; alt=height of geoid above WGS84 ellipsoid; M=units of geoidal height in meters; t2=time since last DGPS update; refcheck=DGPS reference station id and the checksum.

Example: $GPGGA,170003.00,4119.08134,N,07221.00464,W,2,09,1.2,5.5,M,-33.8,M,6.4,0008*70 UTC Time = 170003.00 Latitude Deg = 41 Latitude Min = 19.08134 N Longitude Deg = 072 Longitude Min = 21.00464 W Fix Quality = 2 (indicates Differential GPS) Number of satellites = 09 HDOP = 1.2 relative accuracy of horizontal position Altitude = 5.5 meters above mean sea level Height of geoid above WGS84 ellipsoid = -33.8 meters Time since last update = 6.4 Checksum = 0008*70.

$GPVTG is track made good and ground speed in the format: $GPVTG, true, T, mag, M, grsp1, N, grsp2, K, mode, where t=true course made good over ground in degrees, T= True, m=magnetic course made good over ground in degrees, M=magnetic, grsp1=ground speed, N=Knots, grsp2=ground speed, K=Kilometers per hour, mode=Mode indicator (A=Autonomous, D=Differential, E=Estimated, N=Data not valid).

Example: $GPVTG,70.98,T,,M,0.09,N,0.17,K,D*01 True course made good: 340.39 Magnetic course made good: 70.98 Ground speed (knots) = 0.09 Ground speed (kilometers) = 0.17 Mode=Differential.

Entity_and_Attribute_Detail_Citation:

The definitions of the NMEA strings were obtained from: http://home.mira.net/~gnb/gps/nmea.html, http://www.nps.gov/gis/gps/NMEA_sentences.html.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Seth Ackerman
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
Country: USA

Contact_Voice_Telephone: 508-548-8700 x2315
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: sackerman@usgs.gov

Resource_Description:

USGS data release 2012-024-FA contains raw sampling navigation files collected in the Connecticut River (2012-024-FA_SamplingNav.zip). The zip file contains 4 raw navigation files that serve as a navigation archive and Federal Geographic Data Committee (FGDC) Content Standards for Digital Geospatial Metadata (CSDGM) metadata files (2012-024-FA_SamplingNav.xml) in standard formats.

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. Any use of trade, product, or firm 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: TEXT
Format_Version_Number: none
Format_Specification: Text file
Format_Information_Content:

ASCII text files containing RAW navigation data. This zip file also includes associated metadata.

File_Decompression_Technique:

Use 7zip, WinZip, Peazip, pkUnzip, Keka or other uncompressing software

Transfer_Size: 1

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://cmgds.marine.usgs.gov/data/field-activity-data/2012-024-FA/data/navigation/2012-024-FA_SamplingNav.zip

Network_Resource_Name: https://doi.org/10.5066/F7PG1Q7V
Network_Resource_Name:

https://cmgds.marine.usgs.gov/data/field-activity-data/2012-024-FA/

Access_Instructions:

The first link is a direct link to download the zipped file of the backscatter imagery and metadata. The second and third links will both take you to the field activity data page containing all of the available data from this survey including this dataset.

Fees: none

Technical_Prerequisites:

These data are available as ASCII text files. To utilize these data, the user must have software capable of unzipping the zip file, viewing text files and parsing the navigation strings.

Text files of the navigation logged with during the sampling survey of field activity 2012-024-FA in 2012 by the U.S. Geological Survey in the Connecticut River

Metadata: