Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
2024
|
| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.971509 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1867171044472651776 |
|---|---|
| author | Kopte, Robert Engels, Martin Wegener, Gunter Mette, Jonathan Renzelmann, Henri |
| author_facet | Kopte, Robert Engels, Martin Wegener, Gunter Mette, Jonathan Renzelmann, Henri |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Current velocities of the upper water column along the cruise track of R/V Sonne cruise SO301 were collected by a vessel-mounted 75 kHz RDI Ocean Surveyor ADCP. The ADCP transducer was located at 6.0 m below the water line. The instrument was operated in narrowband mode (WM10) with a bin size of 8.00 m, a blanking distance of 8.00 m, and a total of 100 bins, covering the depth range between 22.0 m and 814.0 m. Beam velocities as recorded by the data acquistion software VmDAS were transformed to ship coordinates and after merging with the navigation data from the ship's Motion Reference Unit and Global Positioning systems into earth coordinates. The ship's velocity was calculated from position fixes obtained by the Global Positioning System (GPS). Accuracy of the ADCP velocities mainly depends on the quality of the position fixes and the ship's heading data. Further errors stem from a misalignment of the transducer with the ship's centerline. Data post-processing included water track calibration of the misalignment angle (-0.1101° +/- 0.5074°) and scale factor (0.9998 +/- 0.0090) of the Ocean Surveyor signal. The velocity data were averaged in time using an average interval of 60 s. Velocity quality flagging is based on different threshold criteria: Depth cells with ensemble-averaged percent-good values below 25% are marked as 'bad data'. Depth cells with velocities above 1.5 m/s are flagged as 'bad data'. Depth cells with a root-mean-square deviation between the measured ensemble-average velocity and a cell-wise running-mean velocity above 0.3 m/s are flagged as 'probably bad data'. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_971509 |
| institution | PANGAEA |
| language | en |
| publishDate | 2024 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Shipboard ADCP current measurements (75 kHz) during RV SONNE cruise SO301 Kopte, Robert Engels, Martin Wegener, Gunter Mette, Jonathan Renzelmann, Henri Current velocity, east-west; Current velocity, north-south; DAM_Underway; DAM Underway Research Data; DataHub; DataHub Earth and Environment of the Helmholtz Association; DATE/TIME; DEPTH, water; Echo intensity, relative; LATITUDE; LONGITUDE; Pings, averaged to a double ensemble value; Quality flag, current velocity; SCIROCCO; Seadatanet flag: Data quality control procedures according to SeaDataNet (2010); SO301; SO301_0_Underway-6; Sonne_2; Vessel mounted Acoustic Doppler Current Profiler [75 kHz]; VMADCP-75 Current velocities of the upper water column along the cruise track of R/V Sonne cruise SO301 were collected by a vessel-mounted 75 kHz RDI Ocean Surveyor ADCP. The ADCP transducer was located at 6.0 m below the water line. The instrument was operated in narrowband mode (WM10) with a bin size of 8.00 m, a blanking distance of 8.00 m, and a total of 100 bins, covering the depth range between 22.0 m and 814.0 m. Beam velocities as recorded by the data acquistion software VmDAS were transformed to ship coordinates and after merging with the navigation data from the ship's Motion Reference Unit and Global Positioning systems into earth coordinates. The ship's velocity was calculated from position fixes obtained by the Global Positioning System (GPS). Accuracy of the ADCP velocities mainly depends on the quality of the position fixes and the ship's heading data. Further errors stem from a misalignment of the transducer with the ship's centerline. Data post-processing included water track calibration of the misalignment angle (-0.1101° +/- 0.5074°) and scale factor (0.9998 +/- 0.0090) of the Ocean Surveyor signal. The velocity data were averaged in time using an average interval of 60 s. Velocity quality flagging is based on different threshold criteria: Depth cells with ensemble-averaged percent-good values below 25% are marked as 'bad data'. Depth cells with velocities above 1.5 m/s are flagged as 'bad data'. Depth cells with a root-mean-square deviation between the measured ensemble-average velocity and a cell-wise running-mean velocity above 0.3 m/s are flagged as 'probably bad data'. |
| title | Shipboard ADCP current measurements (75 kHz) during RV SONNE cruise SO301 |
| topic | Current velocity, east-west; Current velocity, north-south; DAM_Underway; DAM Underway Research Data; DataHub; DataHub Earth and Environment of the Helmholtz Association; DATE/TIME; DEPTH, water; Echo intensity, relative; LATITUDE; LONGITUDE; Pings, averaged to a double ensemble value; Quality flag, current velocity; SCIROCCO; Seadatanet flag: Data quality control procedures according to SeaDataNet (2010); SO301; SO301_0_Underway-6; Sonne_2; Vessel mounted Acoustic Doppler Current Profiler [75 kHz]; VMADCP-75 |
| url | https://doi.org/10.1594/PANGAEA.971509 |