netcdf frf/meteorology/wind/derived/derived.ncml {
  dimensions:
    station_name_length = 29;
    time = 1826875;
  variables:
    double latitude;
      :_FillValue = -999.99; // double
      :units = "degrees_north";
      :standard_name = "latitude";
      :long_name = "Latitude";
      :shortName = "Lat";
      :short_name = "latitude";

    double longitude;
      :_FillValue = -999.99; // double
      :units = "degrees_east";
      :standard_name = "longitude";
      :long_name = "Longitude";
      :shortName = "Lon";
      :short_name = "longitude";

    char station_name(station_name_length=29);
      :units = ;
      :long_name = "station name";
      :cf_role = "timeseries_id";
      :short_name = "station_name";
      :_ChunkSizes = 29U; // uint

    double time(time=1826875);
      :_FillValue = -999.99; // double
      :units = "seconds since 1970-01-01 00:00:00";
      :standard_name = "time";
      :long_name = "UTC Sample Time";
      :calendar = "gregorian";
      :short_name = "time";
      :_ChunkSizes = 1000U; // uint

    float windSpeed(time=1826875);
      :standard_name = "wind_speed";
      :long_name = "Mean Wind Speed";
      :description = "10 minute mean wind speed";
      :short_name = "Wind Speed";
      :coordinates = "time lat lon";
      :_FillValue = -999.99f; // float
      :units = "m s-1";
      :_ChunkSizes = 4462U; // uint

    float vectorSpeed(time=1826875);
      :_FillValue = -999.99f; // float
      :units = "m s-1";
      :long_name = "Vector Averaged Wind Speed";
      :description = "Vector averaged wind speed";
      :short_name = "Wind Speed";
      :coordinates = "time lat lon";
      :_ChunkSizes = 4462U; // uint

    float sustWindSpeed(time=1826875);
      :_FillValue = -999.99f; // float
      :units = "m s-1";
      :long_name = "Sustained Wind Speed";
      :description = "1 minute largest mean wind speed";
      :short_name = "Sustained Wind Speed";
      :coordinates = "time lat lon";
      :_ChunkSizes = 4462U; // uint

    float windGust(time=1826875);
      :_FillValue = -999.99f; // float
      :units = "m s-1";
      :standard_name = "wind_speed_of_gust";
      :long_name = "Wind Gust";
      :description = "5 second largest mean wind speed";
      :short_name = "Gust";
      :coordinates = "time lat lon";
      :_ChunkSizes = 4462U; // uint

    float windDirection(time=1826875);
      :_FillValue = -999.99f; // float
      :units = "degree";
      :standard_name = "wind_from_direction";
      :long_name = "Wind Direction";
      :description = "Wind direction from true north";
      :short_name = "Wind Direction";
      :coordinates = "time lat lon";
      :_ChunkSizes = 4462U; // uint

    float maxWindSpeed(time=1826875);
      :_FillValue = -999.99f; // float
      :units = "m s-1";
      :long_name = "Maximum Wind Speed";
      :description = "Maximum wind speed in the 10 minute average";
      :short_name = "Maximum Wind Speed";
      :coordinates = "time lat lon";
      :_ChunkSizes = 4462U; // uint

    float minWindSpeed(time=1826875);
      :_FillValue = -999.99f; // float
      :units = "m s-1";
      :long_name = "Minimum Wind Speed";
      :description = "Minimum wind speed in the 10 minute average";
      :short_name = "Minimum Wind Speed";
      :coordinates = "time lat lon";
      :_ChunkSizes = 4462U; // uint

    float stdWindSpeed(time=1826875);
      :_FillValue = -999.99f; // float
      :units = "m s-1";
      :long_name = "Standard Deviation of Averaged Wind Speed";
      :description = "Standard deviation of wind speed in the 10 minute average";
      :short_name = "Standard Deviation";
      :coordinates = "time lat lon";
      :_ChunkSizes = 4462U; // uint

    int qcFlag(time=1826875);
      :_FillValue = -999; // int
      :units = ;
      :long_name = "Quality Control Flag Value";
      :flag_values = "0, 1, 2, 3";
      :flag_meanings = "0=passed, 1=passed but edited, 2=questionable, 3=failed";
      :short_name = "QC Flag";
      :coordinates = "time lat lon";
      :_ChunkSizes = 4462U; // uint

    float gaugeElevation(time=1826875);
      :_FillValue = -999.99f; // float
      :units = "m";
      :long_name = "Anemometer_elevation";
      :description = "Anemometer elevation above NAVD88";
      :short_name = "gaugeElevation";
      :_ChunkSizes = 4464U; // uint

    byte qcFlagS(time=1826875);
      :_FillValue = -99B; // byte
      :units = ;
      :long_name = "Wind Speed Quality Control Flag Value";
      :flag_values = "0, 1, 2, 3";
      :flag_meanings = "0=passed, 1=passed but edited, 2=questionable, 3=failed";
      :short_name = "QC FlagS";
      :coordinates = "time lat lon";
      :_ChunkSizes = 4464U; // uint

    byte qcFlagD(time=1826875);
      :_FillValue = -99B; // byte
      :units = ;
      :long_name = "Wind Direction Quality Control Flag Value";
      :flag_values = "0, 1, 2, 3";
      :flag_meanings = "0=passed, 1=passed but edited, 2=questionable, 3=failed";
      :short_name = "QC FlagD";
      :coordinates = "time lat lon";
      :_ChunkSizes = 4464U; // uint

    byte id(time=1826875);
      :_FillValue = -99B; // byte
      :units = "sensor_id_used_for_index";
      :flag_meanings = "See the summary attribute";
      :standard_name = "sensor_id";
      :short_name = "id";
      :_ChunkSizes = 4464U; // uint

  // global attributes:
  :cdm_data_type = "Station";
  :featureType = "timeSeries";
  :station_name = "EOP-Derived-Winds";
  :title = "FRF End of Pier Derived Winds";
  :summary = "Wind data Collected at the USACE Coatal Hydraulics Laboratory (CHL), Field Research Facility (FRF) in Duck, NC. These data were collected on the end of the FRF pier (EOP) with RM Young (RMY) serial output Marine Anemometers with a serial (digital) output. These data are termed Derived since they use a combination of gauges to best estimate the winds.  There is a preferential order to choose a gauge, if the data  record is QC flagged the other gauges are considered.   Data were sampled at 1 Hz and statistics are computed at 10 minute intervals:\n  speed   = 10-min average speed, m/s\n  vspeed  = vector average speed, m/s\n  sust    = highest 1 min average speed, m/s\n  gust    = highest 5 s average speed, m/s\n  minSp   = lowest instantaneous speed, m/s\n  maxSp   = highest instantaneous speed, m/s\n  spdStd  = standard deviation of speed, m/s\n  vdir    = vector averaged direction, coming from, clockwise from true north, deg\n  elev    = gauge elevation (m) from NAVD88 (changes depending on the gauge used)\n  gaugeUsed = integer mapped to the following gauges:\n          ID  Latitude    Longitude  Elev   Description\n    1 =  932  36.183683 -75.745116 18.84  EOP SE boom\n    2 =  832  36.183688 -75.745143 18.84  EOP NW boom\n    3 =  532  36.183678 -75.745137 19.58  EOP tower, RMY Sonic\n    4 =  732  36.183638 -75.745460 19.58  EOP NDBC tower\n    5 =  632  36.182075 -75.751244 19.95  Roof om main building (out of service 1993)\n";
  :history = "USACE/FRF";
  :source = "In situ observations from FRF-met_wind_windDerived_YYYYMM.mat";
  :sourceUrl = "(local files)";
  :standard_name_vocabulary = "CFv25";
  :Metadata_Conventions = "Unidata Dataset Discovery v1.0, CF-1.6";
  :metadata_link = "N/A";
  :Conventions = "CF-1.6";
  :creator_name = "USACE/CHL/COAB";
  :creator_url = "http://www.frf.usace.army.mil/";
  :creator_email = "frfwebmaster@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.";
  :keywords_vocabulary = "Global Change Master Directory (GCMD) Earth Science Keywords; CF Standard Name Table (v23, 23 March 2013)";
  :keywords = "Atmosphere > Atmospheric Winds > Surface Winds > Wind Speed/Wind Direction, Oceans > Ocean Winds > Surface Winds, DOD > DOD/USARMY/USACE/CHL/COAB/FRF > Field Research Facility, Coastal And Hydraulics Laboratory, U. S. Army Corps Of Engineers, U.S. Army, U. S. Department Of Defense, wind_speed, wind_speed_of_gust, wind_from_direction\n";
  :processing = "realtime";
  :organization = "USACE/CHL/COAB";
  :publisher_url = "http://frf.usace.army.mil";
  :infoUrl = "http://frf.usace.army.mil";
  :publisher_email = "frfwebmaster@usace.army.mil";
  :publisher_name = "USACE/CHL/COAB";
  :format_version = "v1.0";
  :institution = "USACE/CHL/COAB";
  :contact = "USACE/CHL/COAB";
  :contact_info = "USACE/CHL/COAB";
  :contact_role = "Owner";
  :contributor_name = "USACE/CHL/COAB";
  :contributor_role = "USACE/CHL/COAB";
  :naming_authority = "FRF";
  :origin = "USACE/CHL/COAB";
  :date_created = "2025-05-31";
  :date_issued = "2025-05-31";
  :project = "USACE/FRF observations";
  :id = "FRF-met_wind_derived";
  :acknowledgement = "Data are provided by the U.S. Army Engineer Research and Development Center, Coastal and Hydraulics Laboratory, Duck, NC.";
  :processing_level = "L1";
  :geospatial_vertical_units = "m";
  :geospatial_vertical_resolution = 0.0; // double
  :geospatial_vertical_min = 18.84; // double
  :geospatial_vertical_max = 19.58; // double
  :geospatial_lat_min = 36.183683; // double
  :geospatial_lat_max = 36.183688; // double
  :geospatial_lat_units = "degrees_north";
  :geospatial_lon_min = -75.745116; // double
  :geospatial_lon_max = -75.74546; // double
  :geospatial_lon_units = "degrees_east";
  :geospatial_vertical_origin = "NAVD88";
  :geospatial_vertical_positive = "up";
  :time_coverage_start = "2025-05-01T00:00:00";
  :time_coverage_end = "2025-05-31T23:50:00";
  :deployment_start = "2011-10-18T12:00:00Z";
  :deployment_end = "present";
  :comment = ; // double
  :cross_shore_angle = 71.8; // double
  :cross_shore_angle_units = "degrees_from_north";
  :cross_shore_angle_description = "Cross shore angle measured as CW from N at the USACE FRF site in DUCK, NC. Subtract this value from the wind direction to get direction relative to cross shore.";
  :depth = 0.0; // double
}