Data Access Form

Dataset Title:	Field Validation of Geolux Oceanographic Radar at USACE Field Research Facility - FRFx600_202304glx_spec
Institution:	Coastal and Marine Hazards and Resources Program, U.S. Geological Survey (Dataset ID: 10_5066_P1NLPWRP_FRFx600_202304glx_spec_nc)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Files \| Make a graph

To work correctly, this web page requires that JavaScript be enabled in your browser. Please:
1) Enable JavaScript in your browser:
      • Chrome: "Settings : Advanced : Privacy and security : Site Settings : JavaScript"
      • Firefox: (it should be always on!)"
      • Opera: "Settings : Websites : JavaScript"
      • Safari: "Safari : Preferences : Security : Enable JavaScript"
2) Reload this web page.

Variable	Minimum	Maximum
station_id	"10_5066_P1NLPWRP_F..."	"10_5066_P1NLPWRP_F..."
z (height relative to NAVD88, m)	8.639999999999997	8.639999999999997
depth_m (depth below mean sea level, m)	-8.77	-8.77
latitude (degrees_north)	36.183688	36.183688

longitude (degrees_east)	-75.745215	-75.745215

water_level (Water level NAVD88, m)	-0.7370604578360399	0.7991752547021943
time (time (UTC), UTC)	2023-04-01T00:00:00Z	2023-04-30T23:00:00Z

wp_peak (Dominant (peak) wave period, s)	3.2	15.753846153846155
wh_4061 (Significant wave height, m)	0.24820458018589178	2.8316531169692083
wp_4060 (Average wave period, s)	2.213138292760128	7.696310496292459
frequency (Hz)	0.01953125	1.9970703125
sspec (m^2/Hz)	4.311202621614051E-6	10.671931251333358
water_depth (Total water depth, m)	6.950536132812499	8.489050585937497

Server-side Functions

distinct()

Hover here to see a list of options. Click on an option to select it.

File type: (more information)

(Documentation / Bypass this form )

(Please be patient. It may take a while to get the data.)

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  station_id {
    String actual_range 
"10_5066_P1NLPWRP_FRFx600_202304glx_spec_nc
10_5066_P1NLPWRP_FRFx600_202304glx_spec_nc";
    String cf_role "timeseries_id";
    String ioos_category "Identifier";
    String long_name "Station ID";
  }
  z {
    Float64 actual_range 8.639999999999997, 8.639999999999997;
    String axis "Z";
    String geopotential_datum_name "NAVD88";
    String ioos_category "Other";
    String long_name "height relative to NAVD88";
    String positive "up";
    String standard_name "height";
    String units "m";
  }
  depth_m {
    Float64 actual_range -8.77, -8.77;
    String ioos_category "Other";
    String long_name "depth below mean sea level";
    String positive "down";
    String standard_name "depth_below_geoid";
    String units "m";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 36.183688, 36.183688;
    String axis "Y";
    Float64 epic_code 500;
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -75.745215, -75.745215;
    String axis "X";
    Float64 epic_code 502;
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  water_level {
    UInt32 _ChunkSizes 512;
    Float64 actual_range -0.7370604578360399, 0.7991752547021943;
    String FillValue "nan";
    String geopotential_datum_name "NAVD88";
    String ioos_category "Other";
    String long_name "Water level NAVD88";
    Float64 maximum 0.7991752547021943;
    Float64 minimum -0.7370604578360399;
    String standard_name "sea_surface_height_above_geopotential_datum";
    String units "m";
  }
  time {
    UInt32 _ChunkSizes 1024;
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.6803072e+9, 1.6828956e+9;
    String axis "T";
    String calendar "proleptic_gregorian";
    String ioos_category "Time";
    String long_name "time (UTC)";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  wp_peak {
    UInt32 _ChunkSizes 360;
    Float64 actual_range 3.2, 15.753846153846155;
    Float64 epic_code 4063;
    String FillValue "nan";
    String ioos_category "Other";
    String long_name "Dominant (peak) wave period";
    Float64 maximum 15.753846153846155;
    Float64 minimum 3.2;
    String note 
"2025-02-25T16:26:12.734039+00:00: Values filled where wh_4061 <= 0.02.
";
    String standard_name "sea_surface_wave_period_at_variance_spectral_density_maximum";
    String units "s";
  }
  wh_4061 {
    UInt32 _ChunkSizes 360;
    Float64 actual_range 0.24820458018589178, 2.8316531169692083;
    Float64 epic_code 4061;
    String FillValue "nan";
    String ioos_category "Other";
    String long_name "Significant wave height";
    Float64 maximum 2.8316531169692083;
    Float64 minimum 0.24820458018589178;
    String note 
"2025-02-25T16:26:12.734039+00:00: Values filled where wh_4061 <= 0.02.
";
    String standard_name "sea_surface_wave_significant_height";
    String units "m";
  }
  wp_4060 {
    UInt32 _ChunkSizes 360;
    Float64 actual_range 2.213138292760128, 7.696310496292459;
    Float64 epic_code 4060;
    String FillValue "nan";
    String ioos_category "Other";
    String long_name "Average wave period";
    Float64 maximum 7.696310496292459;
    Float64 minimum 2.213138292760128;
    String note 
"2025-02-25T16:26:12.734039+00:00: Values filled where wh_4061 <= 0.02.
";
    String standard_name "sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment";
    String units "s";
  }
  frequency {
    Float64 actual_range 0.01953125, 1.9970703125;
    String ioos_category "Other";
    String long_name "Frequency";
    String standard_name "sea_surface_wave_frequency";
    String units "Hz";
  }
  sspec {
    UInt32 _ChunkSizes 1, 406;
    Float64 actual_range 4.311202621614051e-6, 10.671931251333358;
    String FillValue "nan";
    String ioos_category "Other";
    String long_name "Surface track derived non-directional wave energy spectrum";
    Float64 maximum 10.671931251333358;
    Float64 minimum 4.311202621614051e-6;
    String note "Use caution: all spectra are provisional";
    String standard_name "sea_surface_wave_variance_spectral_density";
    String units "m^2/Hz";
  }
  water_depth {
    UInt32 _ChunkSizes 360;
    Float64 actual_range 6.950536132812499, 8.489050585937497;
    Float64 epic_code 3;
    String FillValue "nan";
    String ioos_category "Other";
    String long_name "Total water depth";
    Float64 maximum 8.489050585937497;
    Float64 minimum 6.950536132812499;
    String standard_name "sea_floor_depth_below_sea_surface";
    String units "m";
  }
 }
  NC_GLOBAL {
    String basefile "2023-04/FastHzData";
    Float64 brange_max 14;
    Float64 brange_med_diff 1;
    String cdm_data_type "TimeSeries";
    String cdm_timeseries_variables "station_id";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String COORD_SYSTEM "GEOGRAPHIC";
    String creator_url "https://www.usgs.gov";
    String DATA_CMNT "No magnetic variation recorded, used data from IGRF model via ngdc.noaa.gov.";
    String DATA_ORIGIN "USGS";
    String DATA_SUBTYPE "MOORED";
    String Deployment_date "2023-04-01 00:00";
    Float64 DEPTH_CONST 0.0;
    String DESCRIPTION "A Geolux oceanographic radar package was deployed at the USACE Field Research Facility on the research pier to compare measurements of water levels and waves with nearby long-term monitoring observations.";
    Float64 DRIFTER 0.0;
    Float64 Easternmost_Easting -75.745215;
    String EXPERIMENT "Field Validation of Geolux Oceanographic Radar at USACE Field Research Facility";
    String experiment_name "10.5066-P1NLPWRP";
    String FAN "2022-352-FA";
    String featureType "TimeSeries";
    String filename "FRFx600_202304_mergedglx";
    Float64 fill_value 7999.0;
    String filtered_wl "true";
    String geopotential_datum_name "NAVD88";
    String geopotential_datum_note "Elevation of the seabed in meters (m) relative to NAVD88, estimated from the USACE FRF bathymetry survey (https://chldata.erdc.dren.mil/thredds/catalog/frf/geomorphology/DEMs/surveyDEM/data/catalog.html) on 17-Apr-2023 at the location nearest the radar at the end of the pier (local FRF cross-shore, xFRF, and alongshore, yFRF, coordinates of xFRF = 600 m and yFRF = 524 m).";
    Float64 geospatial_lat_max 36.183688;
    Float64 geospatial_lat_min 36.183688;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -75.745215;
    Float64 geospatial_lon_min -75.745215;
    String geospatial_lon_units "degrees_east";
    Float64 height_above_geopotential_datum -7.69;
    String history 
"2025-02-25T16:11:55.823131+00:00: Processed using glx.py with stglib 1.3.0, xarray 2025.1.2, NumPy 2.2.2, netCDF4 1.7.2, Python 3.12.8.
2025-02-25T16:12:08.980582+00:00: Data clipped using good_dates of ['2023-04-01 00:00', '2023-04-19 18:25'].
2025-02-25T16:26:12.633032+00:00: Wave statistics computed using scipy.signal.welch(), Since this instrument (Geolux LX-80-15 10Hz) measures the sea-surface elevation directly no cutoff frequecncy is assigned, but a maximum frequency of the lesser of Nyquist (sample_rate/2) or 2 Hz is used.

2026-04-01T16:44:44Z (local files)
2026-04-01T16:44:44Z https://cmgds.marine.usgs.gov/erddap/tabledap/10_5066_P1NLPWRP_FRFx600_202304glx_spec_nc.html";
    String infoUrl "https://cmgds.marine.usgs.gov/ocean-time-series/";
    Float64 initial_instrument_height 16.33;
    String initial_instrument_height_note "Elevation of the radar sensor in meters relative to seabed, estimated as the difference in elevation of the radar sensor (Variable, z) and the seabed (Global Attribute, height_above_geopotential_datum) measured in meters relative to NAVD88.";
    String institution "Coastal and Marine Hazards and Resources Program, U.S. Geological Survey";
    String institution_url "https://www.usgs.gov/st-petersburg-coastal-and-marine-science-center";
    String instrument_type "Geolux LX-80-15 10Hz";
    Float64 latitude 36.183688;
    String LatLonDatum "NAD83";
    String license 
"The data may be used and redistributed for free but is not intended
for legal use, since it may contain inaccuracies. Neither the data
Contributor, ERD, NOAA, nor the United States Government, nor any
of their employees or contractors, makes any warranty, express or
implied, including warranties of merchantability and fitness for a
particular purpose, or assumes any legal liability for the accuracy,
completeness, or usefulness, of this information.";
    Float64 longitude -75.745215;
    Float64 magnetic_variation -10.96;
    String MOORING "FRFx600_202304";
    String NCProperties "version=2,netcdf=4.9.2,hdf5=1.14.4";
    Float64 Northernmost_Northing 36.183688;
    String platform_type "pier railing";
    Float64 POS_CONST 0.0;
    String PROJECT "USGS Coastal and Marine Hazards and Resources Program";
    String publisher_url "https://www.usgs.gov";
    String recording_type "continuous";
    String Recovery_date "2023-05-01 00:00";
    Float64 sample_interval 0.2;
    Float64 sample_rate 5;
    String SciPi "J. Brown";
    Float64 sea_floor_depth_below_mean_sea_level 7.56;
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 36.183688;
    String start_time "2023-04-01T00:00:00.200000000";
    String stop_time "2023-05-01T00:00:00.000000000";
    String summary "Unspecified";
    String time_coverage_end "2023-04-30T23:00:00Z";
    String time_coverage_start "2023-04-01T00:00:00Z";
    String title "Field Validation of Geolux Oceanographic Radar at USACE Field Research Facility - FRFx600_202304glx_spec";
    Float64 VAR_FILL NaN;
    Float64 WATER_DEPTH 7.56;
    String WATER_DEPTH_NOTE "Water depth in meters (m) relative to MSL, positive down convention, converted from height_above_geopotential_datum by applying a datum offset of -0.128 m as determined at NOAA tide station 8651370 (https://tidesandcurrents.noaa.gov/datums.html?id=8651370).";
    Float64 water_level_med_diff 1;
    Float64 water_level_min -5;
    String WATER_MASS "North Atlantic Ocean";
    Float64 wave_duration 2048;
    Float64 wave_interval 3600;
    Float64 wave_samples_per_burst 10240;
    String wavedat_tolerance "20 s";
    Float64 Westernmost_Easting -75.745215;
    Float64 wh_min 0.02;
    String wlfilt_tolerance "60 s";
  }
}

Using tabledap to Request Data and Graphs from Tabular Datasets

tabledap lets you request a data subset, a graph, or a map from a tabular dataset (for example, buoy data), via a specially formed URL. tabledap uses the OPeNDAP (external link)

Data Access Protocol (DAP) (external link)

and its selection constraints (external link)

The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.

(easy) You can get data by using the dataset's Data Access Form or Subset form. They make the URL for you.
(easy) You can make a graph or map by using the dataset's Make A Graph form. It makes the URL for you.
(not hard) You can bypass the forms and get the data or make a graph or map by generating the URL by hand or with a computer program or script.

Tabledap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/pmelTaoDySst.htmlTable?longitude,latitude,time,station,wmo_platform_code,T_25&time>=2015-05-23T12:00:00Z&time<=2015-05-31T12:00:00Z
Thus, the query is often a comma-separated list of desired variable names, followed by a collection of constraints (e.g., variable<value), each preceded by '&' (which is interpreted as "AND").

For details, see the tabledap Documentation.