Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2017 Title: 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 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. Metadata_Reference_Information: Metadata_Date: 20240318 Metadata_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: 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 USGS. (updated on 20240318) Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time