Kopte, Robert; Engels, Martin; Wegener, Gunter; Mette, Jonathan; Renzelmann, Henri (2024): Shipboard ADCP current measurements (75 kHz) during RV SONNE cruise SO301 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.971509
Always quote citation above when using data! You can download the citation in several formats below.
Published: 2024-07-31 • DOI registered: 2024-08-29
Abstract:
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'.
Related to:
Engels, Martin; Barckhausen, Udo; Bartels, Thies; Bauer, Benedikt; Behrens, Thomas; Belleville, Morgane; Dannowski, Anke; Demir, Ümit; Deppe, Joachim; Ebert, Timo; Ehrhardt, Axel; Filbrandt, Christian; Fröhberg, Nico; Gallucci, Luigi; Gomes de Souza, Berenice; Heyde, Ingo; Jegen, Anna; Kuckuck, Jan; Ladage, Stefan; Lücke, Oscar; Lutz, Rüdiger; Mette, Jonathan; Pedre, Ignacio; Raphael Deeban Raj, Shareen; Schauer, Michael; Schnabel, Michael; Schramm, Bettina; Steinborn, Peter; Renzelmann, Henri; Wegener, Gunter (2024): Seismic Imaging at the Central Indian Ridge: Structure and Formation of Oceanic Core Complexes, Cruise No. SO301, November 22, 2023 - January 4, 2024, Port Louis - Port Louis (Mauritius). SONNE-Berichte, Begutachtungspanel Forschungsschiffe, SO301, 127 pp, https://doi.org/10.48433/cr_so301
Kopte, Robert; Engels, Martin; Wegener, Gunter; Mette, Jonathan; Renzelmann, Henri (2024): Shipboard ADCP current measurements (38 kHz) during RV SONNE cruise SO301 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.971508
Other version:
nc file: ADCP current measurements (75 kHz) during RV SONNE cruise SO301 (2024). so_301_vmadcp_75khz.nc
Data processing report:
Kopte, Robert (2024): Upper-ocean acoustic Doppler current profiler (75kHz-ADCP) underway measurements during SONNE cruise SO301. Institute of Geosciences, Kiel University, so_301_vmadcp_75khz_proc_report.pdf
Standard operating procedure:
Kopte, Robert; Betz, Maximilian; Anselm, Norbert (2022): SOP 75kHz ADCP aboard of RV Sonne (vessel:sonne:adcp_75khz_647271). Zenodo, https://doi.org/10.5281/zenodo.7022767
Project(s):
DAM Underway Research Data (DAM_Underway)
Coverage:
Median Latitude: -25.290019 * Median Longitude: 69.776575 * South-bound Latitude: -26.230000 * West-bound Longitude: 64.554100 * North-bound Latitude: -23.187100 * East-bound Longitude: 70.733900
Date/Time Start: 2023-11-25T01:29:00 * Date/Time End: 2024-01-01T09:52:00
Minimum DEPTH, water: 22.0 m * Maximum DEPTH, water: 814.0 m
Event(s):
SO301_0_Underway-6 * Latitude Start: -23.187100 * Longitude Start: 64.554100 * Latitude End: -23.771400 * Longitude End: 66.643900 * Date/Time Start: 2023-11-25T01:29:00 * Date/Time End: 2024-01-01T09:52:00 * Elevation Start: -3850.6 m * Elevation End: -3706.9 m * O2A Registry URI: hdl:10013/sensor.8d073178-2ec8-4cbd-9548-e0cb29439d27 * Campaign: SO301 (SCIROCCO) * Basis: Sonne_2 * Method/Device: Vessel mounted Acoustic Doppler Current Profiler [75 kHz] (VMADCP-75)
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 2 (ProcLevel2)
Size:
25753100 data points
Download Data
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