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Global Attributes:	origin: USACE/CHL/COAB Metadata_Conventions: Unidata Dataset Discovery v1.0, CF-1.6 format_version: v1.0 contact_info: USACE/CHL/COAB geospatial_lat_units: degrees_north cross_shore_angle_description: cross shore angle at the USACE FRF site in DUCK, NC, clockwise from true north geospatial_lon_units: degrees_west contributor_role: USACE/CHL/COAB keywords: Earth Science > Oceans > Coastal Processes > Shoreline Earth Science > Oceans > Coastal Processes > Beaches Earth Science > Oceans > Coastal Processes > elevation Earth Science > Oceans > Coastal Processes > Barrier islands Earth Science > Oceans > Coastal Processes > sediment transport summary: Repetitive surveys of 28 shore-perpendicular profile lines surrounding the USACE Field Research Facility (FRF) in Duck, NC (600 m to the north and 600 m to the south of the research pier). Surveys are typically monthly. Profile lines are spaced 45m apart and extend from the primary dune to approximately 2km offshore (-14m isobath NAVD88). Survey points are obtained using an Trimble RTK GPS system combined with a Knudsen survey grade echosounder and optionally, a TSS DMS 3-25 motion sensor. These components are mounted on a Lighter Amphibious Resupply Cargo V (LARC-V) vessel which is capable of continuous data collection from the beach, through the surf zone and offshore. Conductivity, temperature, and depth (CTD) are measured at the end of the FRF pier to a depth of -7 m on the day of survey in order to determine the speed of sound in the water column. Data points are collected on average every 2.5 m. Topographic (TOPO) survey points of the beach and dune, above the elevation reached by the LARC-V, are collected with a walking backpack mounted Trimble RTK GPS system. Since changes in the dune occur less frequently than does the beach and offshore, TOPO points may be added from an earlier time period. publisher_name: USACE/CHL/COAB id: FRF-LARC-Survey naming_authority: FRF infoUrl: http://frf.usace.army.mil license: These data may be redistributed and used without restriction. . Data are intended for scholarly use by the research community, with the express agreement that users will properly acknowledge the USACE Field Research Facility and the supporting investigator(s). Use or reproduction of these data for commercial purposes is prohibited without prior written permission. geospatial_lat_max: 36.45 geospatial_vertical_max: 0 title: Beach and Nearshore Surveys at the USACE, Field Research Facility (FRF) in Duck, NC 1999 to Now standard_name_vocabulary: CFv25 institution: USACE/CHL/COAB platform: LARC-V instrument: Bathymetry System publisher_url: http://frf.usace.army.mil organization: USACE/CHL/COAB cross_shore_angle: 71.8 cross_shore_angle_units: degrees_north processing_level: L1 featureType: geospatial publisher_email: frfwebmaster@usace.army.mil sourceUrl: (local files) creator_email: frfwebmaster@usace.army.mil processing: Hypack, Inc.'s Hypack software guides both the LARC-V vessel and back-pack mounted TOPO systems along the profile lines and logs the RTK-GPS data (1 Hz), echosounder depth (9 Hz) and motion data (9 Hz). Processing software consists of Fathomax, a custom FORTRAN routine that dynamically synchronizes the GPS, echosounder, and motion sensor data in order to remove the motion of the vessel due to waves. This is accomplished by adjusting the latency between the GPS and the echosounder data streams until the influence of the wave motion is minimized, and a best fit is obtained. The survey software also adjusts depths for the speed of sound and converts geographic coordinates to the local FRF coordinate system. Data collection and processing is done using Microsoft Windows-based computers. Data file size varies from 70-3,300 kb depending on the number or profile lines included in the survey. Data are measured in Lat/Lon and geospatial_lat_min: 36.25 contact_role: Owner metadata_link: N/A geospatial_vertical_min: 0 time_coverage_start: 1999 creator_url: http://frf.usace.army.mil keywords_vocabulary: FGlobal Change Master Directory (GCMD) Earth Science Keywords; CF Standard Name Table (v23, 23 March 2013) geospatial_vertical_origin: NAVD88 geospatial_lon_max: 75.96 geospatial_lon_min: 75.58 contributor_name: USACE/CHL/COAB geospatial_vertical_resolution: 0 creator_name: USACE/CHL/COAB acknowledgement: Data are provided by the Field Research Facility; Coastal Observations & Analysis Branch; US Army Corps of Engineers, Duck, North Carolina. time_coverage_end: current Conventions: CF-1.6 project: USACE/COAB observations contact: USACE/CHL/COAB source: Department of Army (DOA), U.S. Army Corps of Engineers (USACE), Engineer Research and Development Center (ERDC), Coastal and Hydraulics Laboratory (CHL) - Field Research Facility (FRF) geospatial_vertical_positive: up date_created: 2016-06-29 date_issued: 2016-06-29 geospatial_vertical_units: m deployment_start: 1999 history: These data are part of a series of surveys since October 1980, designed to document the evolving beach topography and bathymetry surrounding the USACE Field Research Facility (FRF) and to measure its response to coastal processes, including storms. Survey data are complemented by a suite of continuous observations of local waves, winds, tides and currents. These data are unique in their temporal coverage and vertical accuarcy and have been the subject of multiple technical papers.

Variables:	time: Array of 64 bit Reals [time = 0..79532] time: _FillValue: -999.99 units: seconds since 1970-01-01 00:00:00 standard_name: long_name: UTC Sample Time calendar: gregorian short_name: time
	lat: Array of 64 bit Reals [time = 0..79532] time: _FillValue: -999.99 units: degrees_north standard_name: long_name: Latitude short_name: lat
	lon: Array of 64 bit Reals [time = 0..79532] time: _FillValue: -999.99 units: degrees_east standard_name: long_name: Longitude short_name: lon
	northing: Array of 64 bit Reals [time = 0..79532] time: _FillValue: -999.99 units: m standard_name: long_name: Northing in NC Stateplane 3200 short_name: Depth
	easting: Array of 64 bit Reals [time = 0..79532] time: _FillValue: -999.99 units: m standard_name: long_name: Northing in NC Stateplane 3200 short_name: Easting
	FRF_Xshore: Array of 64 bit Reals [time = 0..79532] time: _FillValue: -999.99 units: m standard_name: long_name: Local FRF Cross-Shore Coordinate short_name: x
	FRF_Yshore: Array of 64 bit Reals [time = 0..79532] time: _FillValue: -999.99 units: m standard_name: long_name: Local FRF Along-Shore coordinate short_name: y
	elevation: Array of 64 bit Reals [time = 0..79532] time: _FillValue: -999.99 units: m standard_name: long_name: bottom elevation description: Elevation is in NAVD88 short_name: z
	profileNumber: Array of 16 bit Unsigned Integers [time = 0..79532] time: long_name: profile number description: here is a description short_name: 1D Wave Energy _FillValue: -999 units: none standard_name:
	surveyNumber: Array of 16 bit Unsigned Integers [time = 0..79532] time: _FillValue: -999 units: None standard_name: long_name: survey number description: heres a description short_name: sruvery number
	Ellipsoid: Array of 64 bit Reals [time = 0..79532] time: _FillValue: -999.99 units: standard_name: long_name: description: short_name:

For questions or comments about this dataset, contact the administrator of this server [Spicer Bak] at: Spicer.Bak@usace.army.mil

For questions or comments about the OPeNDAP service bundled with the TDS, email THREDDS support at: support-thredds@unidata.ucar.edu

DDS:

Dataset {
    Float64 time[time = 79533];
    Float64 lat[time = 79533];
    Float64 lon[time = 79533];
    Float64 northing[time = 79533];
    Float64 easting[time = 79533];
    Float64 FRF_Xshore[time = 79533];
    Float64 FRF_Yshore[time = 79533];
    Float64 elevation[time = 79533];
    UInt16 profileNumber[time = 79533];
    UInt16 surveyNumber[time = 79533];
    Float64 Ellipsoid[time = 79533];
} frf/projects/bathyduck/survey/transect/transect.ncml;

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