Kopte, Robert; Koppelmann, Rolf; Auel, Holger (2023): ADCP current measurements (38 kHz) during RV METEOR cruise M186/2 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.961671
Always quote citation above when using data! You can download the citation in several formats below.
Published: 2023-09-29 • DOI registered: 2023-10-28
Abstract:
Current velocities of the upper water column along the cruise track of R/V Meteor III cruise MET186/2 were collected by a vessel-mounted 38 kHz RDI Ocean Surveyor ADCP. The ADCP transducer was located at 5.0 m below the water line. The instrument was operated in narrowband mode (WM10) with a bin size of 16.00 m, a blanking distance of 16.00 m, and a total of 100 bins, covering the depth range between 37.0 m and 1621.0 m. Heading, pitch and roll data from the ship's motion reference unit and the navigation data from the Global Positioning systems were used by the data acquisition software VmDAS internally to convert ADCP velocities into earth coordinates. Measured velocities and bin-depth mapping were corrected due to occasional incorrect temperature measurements at the transducer that affected the sound velocity calculation. Corrected sound velocity values were derived using temperature measured by the ship's thermosalinograph. 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 (-44.9046° +/ 0.4750°) and scale factor (1.0043 +/- 0.0085) 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 following threshold criteria: abs(UC) or abs(VC) > 1.5 m/s, rms(UC_z) or rms(VC_z) > 0.3.
Other version:
nc file: ADCP current measurements (38 kHz) during RV METEOR cruise M186_2 (2023). met_186_2_vmadcp_38khz.nc
Data processing report:
Kopte, Robert (2023): Upper-ocean acoustic Doppler current profiler (38kHz-ADCP) underway measurements during METEOR cruise M186_2. Institute of Geosciences, Kiel University, met_186_2_vmadcp_38khz_proc_report.pdf
Standard operating procedure:
Kopte, Robert; Betz, Maximilian; Anselm, Norbert (2022): SOP 38kHz ADCP aboard of RV Meteor ( vessel:meteor:adcp_38khz_1214k). Zenodo, https://doi.org/10.5281/zenodo.7022812
Project(s):
DAM Underway Research Data (DAM_Underway)
Coverage:
Median Latitude: 2.071970 * Median Longitude: -10.836861 * South-bound Latitude: -16.423500 * West-bound Longitude: -20.750700 * North-bound Latitude: 24.590300 * East-bound Longitude: 6.455500
Date/Time Start: 2023-01-04T18:45:00 * Date/Time End: 2023-01-19T16:58:00
Minimum DEPTH, water: 37.0 m * Maximum DEPTH, water: 1621.0 m
Event(s):
M186/2_0_Underway-1 * Latitude Start: 24.595400 * Longitude Start: -19.563467 * Latitude End: -16.424733 * Longitude End: 6.456867 * Date/Time Start: 2023-01-04T18:43:00 * Date/Time End: 2023-01-19T17:00:00 * O2A Registry URI: hdl:10013/sensor.302e7de2-7193-400e-8cd5-7bff90f614bc * Campaign: M186/2 (AtlanTIC) * Basis: Meteor (1986) * Method/Device: Acoustic Doppler Current Profiler (ADCP)
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:
10016410 data points
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