Kopte, Robert; Bühring, Solveig I (2024): Shipboard ADCP current measurements (38 kHz) during RV METEOR cruise M192/2 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.974227 (DOI registration in progress)
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Current velocities of the upper water column along the cruise track of R/V Meteor cruise M192/2 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 8.00 m, and a total of 80 bins, covering the depth range between 29.0 m and 1293.0 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. Single-ping data were screened for bottom signals and, where appropriate, a bottom mask was manually processed. 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 (-44.7845° +/- 0.5200°) and scale factor (0.9992 +/- 0.0099) 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:
Kopte, Robert; Bühring, Solveig I (2024): Shipboard ADCP current measurements (75 kHz) during RV METEOR cruise M192/2 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.974226
Other version:
nc file: ADCP current measurements (38 kHz) during RV METEOR cruise M192/2 (2024). met_192_2_vmadcp_38khz.nc
Data processing report:
Kopte, Robert (2024): Upper-ocean acoustic Doppler current profiler (38kHz-ADCP) underway measurements during METEOR cruise M192/2. Institute of Geosciences, Kiel University, met_192_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.7525334
Project(s):
DAM Underway Research Data (DAM_Underway)
Coverage:
Median Latitude: 36.680626 * Median Longitude: 24.451211 * South-bound Latitude: 36.554400 * West-bound Longitude: 24.009800 * North-bound Latitude: 37.023000 * East-bound Longitude: 24.686400
Date/Time Start: 2023-08-20T13:02:00 * Date/Time End: 2023-08-25T08:10:00
Minimum DEPTH, water: 29.0 m * Maximum DEPTH, water: 893.0 m
Event(s):
MET192/2_0_Underway-5 * Latitude Start: 37.023000 * Longitude Start: 24.009800 * Latitude End: 36.700500 * Longitude End: 24.593900 * Date/Time Start: 2023-08-20T13:02:00 * Date/Time End: 2023-08-25T08:10:00 * O2A Registry URI: hdl:10013/sensor.302e7de2-7193-400e-8cd5-7bff90f614bc * Campaign: M192/2 (BRIDGEHELL) * Basis: Meteor (1986) * Method/Device: Vessel mounted Acoustic Doppler Current Profiler [38 kHz] (VMADCP-38) * Comment: event was not logged in DSHIP
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:
234435 data points
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