![COPERNICUS/MARINE/INSITU_MULTI_4KM/RADAR_TOTAL](https://developers.google.com/earth-engine/datasets/images/COPERNICUS/COPERNICUS_MARINE_INSITU_MULTI_4KM_RADAR_TOTAL_sample.png) Dataset Producer : [Copernicus](https://marine.copernicus.eu/) Tags : [copernicus](https://developers.google.com/earth-engine/datasets/tags/copernicus) [currents](https://developers.google.com/earth-engine/datasets/tags/currents) [insitu](https://developers.google.com/earth-engine/datasets/tags/insitu) [oceans](https://developers.google.com/earth-engine/datasets/tags/oceans) [radar](https://developers.google.com/earth-engine/datasets/tags/radar) #### Description The In Situ TAC is a distributed centre organized around 7 oceanographic regions: the global ocean and the 6 EUROGOOS regional alliances. It involves 14 partners from 11 countries in Europe. It doesn't deploy any observing system and relies on data, exclusively funded by other sources than Copernicus Marine Service. This dataset contains sea surface current observations from High-Frequency (HF) radars. Sea surface currents measured by HF radar are an average over the top 0.3-2.5 m of the water column, depending on the operating central frequency. This dataset provides total velocity components. It comprises gridded maps of total velocity fields of the surface current averaged over a time interval. Total velocities are derived using an un-weighted least-square fit that maps radial velocities, measured by individual measurement stations, onto a Cartesian grid. The final product is a map of the zonal and meridional components of the ocean currents on a regular grid in the area of overlap of two or more radar stations. For more details refer to this [user manual](https://documentation.marine.copernicus.eu/PUM/CMEMS-INS-PUM-013-048.pdf) ### BigQuery Table Schema **Table Schema** | Name | Type | Description | |---|---|---| | TIME | DATETIME | Datetime of the observation | | LATITUDE | DOUBLE | Latitude of the observation | | LONGITUDE | DOUBLE | Longitude of the observation | | DEPTH | DOUBLE | Number of depth levels | | DEPH | DOUBLE | Depth of the observation (m) | | GDOP | DOUBLE | Geometric Dilution of Precision | | DDNS_QC | INT | Quality control flag for DDNS. - 0: No QC was performed - 1: good - 2: probably good - 3: Bad data that are potentially correctable - 4: Bad data - 5: value changed - 6: Not used - 7: nominal - 8: interpolated - 9: Missing value Note that a valid value for the corresponding variable has a QC bit equal to 1, 2, 5, 7, or 8. | | CSPD_QC | INT | Quality control flag for CSPD. - 0: No QC was performed - 1: good - 2: probably good - 3: Bad data that are potentially correctable - 4: Bad data - 5: value changed - 6: Not used - 7: nominal - 8: interpolated - 9: Missing value Note that a valid value for the corresponding variable has a QC bit equal to 1, 2, 5, 7, or 8. | | VART_QC | INT | Quality control flag for VART. - 0: No QC was performed - 1: good - 2: probably good - 3: Bad data that are potentially correctable - 4: Bad data - 5: value changed - 6: Not used - 7: nominal - 8: interpolated - 9: Missing value Note that a valid value for the corresponding variable has a QC bit equal to 1, 2, 5, 7, or 8. | | GDOP_QC | INT | Quality control flag for GDOP. - 0: No QC was performed - 1: good - 2: probably good - 3: Bad data that are potentially correctable - 4: Bad data - 5: value changed - 6: Not used - 7: nominal - 8: interpolated - 9: Missing value Note that a valid value for the corresponding variable has a QC bit equal to 1, 2, 5, 7, or 8. | | QCflag | INT | Overall quality flag > [!NOTE] > **Note:** a value of 1 here indicates that all data in that row's source file was good, but because each row has QC bits for individual fields, a value other than 1 here does not necessarily mean that a row cannot or should not be used. | | EWCT | DOUBLE | Surface Eastward sea water velocity (m/s) | | NSCT | DOUBLE | Surface Northward sea water velocity (m/s) | | EWCS | DOUBLE | Standard Deviation Of Surface Eastward Sea Water Velocity (m/s) | | NSCS | DOUBLE | Standard Deviation Of Surface Northward Sea Water Velocity (m/s) | | CCOV | DOUBLE | Covariance of Surface Sea Water Velocity (m\^2/s\^2) | | POSITION_QC | INT | Quality control flag for POSITION. - 0: No QC was performed - 1: good - 2: probably good - 3: Bad data that are potentially correctable - 4: Bad data - 5: value changed - 6: Not used - 7: nominal - 8: interpolated - 9: Missing value Note that a valid value for the corresponding variable has a QC bit equal to 1, 2, 5, 7, or 8. | | SDN_STATION | STRING | Station identifier | | TIME_QC | INT | Quality control flag for TIME. - 0: No QC was performed - 1: good - 2: probably good - 3: Bad data that are potentially correctable - 4: Bad data - 5: value changed - 6: Not used - 7: nominal - 8: interpolated - 9: Missing value Note that a valid value for the corresponding variable has a QC bit equal to 1, 2, 5, 7, or 8. | | DEPH_QC | INT | Quality control flag for DEPH. - 0: No QC was performed - 1: good - 2: probably good - 3: Bad data that are potentially correctable - 4: Bad data - 5: value changed - 6: Not used - 7: nominal - 8: interpolated - 9: Missing value Note that a valid value for the corresponding variable has a QC bit equal to 1, 2, 5, 7, or 8. | | geometry | GEOMETRY | Geographic location of the observation | ### Terms of Use The data is provided free of charge by the Copernicus Marine Service. Users must acknowledge the Copernicus Marine Service as the data source when using the data. More details on the terms of use can be found on the [Copernicus Marine Service website](https://marine.copernicus.eu/user-corner/service-commitments-and-licence). ### Terms of Use **Terms of Use** The data is provided free of charge by the Copernicus Marine Service. Users must acknowledge the Copernicus Marine Service as the data source when using the data. More details on the terms of use can be found on the [Copernicus Marine Service website](https://marine.copernicus.eu/user-corner/service-commitments-and-licence). ### Explore with Earth Engine > [!NOTE] > **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine) ### Code Editor (JavaScript) ```javascript // This script loads a large BigQuery table and performs per-feature operations, // which can make it take longer to load than typical Earth Engine scripts. var dataset = ee.FeatureCollection.loadBigQueryTable("earth-engine-public-data.insitu_nrt_currents.radar_total_latest") .filter(ee.Filter.date('2025-04-01', '2025-04-02')) .filter(ee.Filter.notNull(['EWCT'])); dataset = dataset.map(function(f) { var val = ee.Number(f.get('EWCT')).float(); return f.buffer(3000) // 3km radius circles .set('EWCT', val); }); var image = dataset.reduceToImage({ properties: ['EWCT'], reducer: ee.Reducer.first() }); var visParams = { min: -0.5, max: 0.5, palette: ['a50026', 'd73027', '333333', '4575b4', '313695'], }; Map.setCenter(25.5, 71.5, 6); Map.addLayer(image, visParams, 'Radar Total EWCT'); ``` [Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/COPERNICUS/COPERNICUS_MARINE_INSITU_MULTI_4KM_RADAR_TOTAL) [Copernicus Global In-situ Observations of Ocean Currents - Radar Total](https://developers.google.com/earth-engine/datasets/catalog/COPERNICUS_MARINE_INSITU_MULTI_4KM_RADAR_TOTAL) The In Situ TAC is a distributed centre organized around 7 oceanographic regions: the global ocean and the 6 EUROGOOS regional alliances. It involves 14 partners from 11 countries in Europe. It doesn't deploy any observing system and relies on data, exclusively funded by other sources than Copernicus Marine Service. ... COPERNICUS/MARINE/INSITU_MULTI_4KM/RADAR_TOTAL, copernicus,currents,insitu,oceans,radar 2025-03-28T00:00:00Z -90 -180 90 180 Google Earth Engine https://developers.google.com/earth-engine/datasets - [](https://doi.org/https://marine.copernicus.eu/) - [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/COPERNICUS_MARINE_INSITU_MULTI_4KM_RADAR_TOTAL)