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Martínez Arbizu, Pedro; Kopte, Robert; Haeckel, Matthias (2023): Shipboard ADCP current measurements (75 kHz) during RV SONNE cruise SO295 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.962920

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Published: 2023-11-09 • DOI registered: 2023-12-26

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Abstract:
Upper-ocean velocities along the cruise track of Sonne cruise SO295 were continuously collected by a vessel-mounted Teledyne RD Instruments 75 kHz Ocean Surveyor ADCP. The transducer was located at 6.0 m below the water line. The instrument was operated in narrowband mode with 8 m bins and a blanking distance of 8.0 m, while 100 bins were recorded using a pulse of 1.45 s. Heading, pitch and roll data from the ship's gyro platforms and the navigation data were used by the data acquisition software VmDas internally to convert ADCP velocities 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 (-0.12° +/- 0.4167°) and scale factor (1.0012 +/- 0.0078) of the Ocean Surveyor signal. The average interval was set to 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.
Related to:
Martínez Arbizu, Pedro; Kopte, Robert; Haeckel, Matthias (2023): Shipboard ADCP current measurements (38 kHz) during RV SONNE cruise SO295 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.962919
Other version:
nc file: ADCP current measurements (75 kHz) during RV SONNE cruise SO295 (2023). so_295_vmadcp_75khz.nc
Data processing report:
Kopte, Robert (2023): Upper-ocean acoustic Doppler current profiler (75kHz-ADCP) underway measurements during SONNE cruise SO295. Institute of Geosciences, Kiel University, so_295_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.7525393
Project(s):
DAM Underway Research Data (DAM_Underway)
Coverage:
Median Latitude: 20.351327 * Median Longitude: -123.805259 * South-bound Latitude: 14.022800 * West-bound Longitude: -125.912800 * North-bound Latitude: 26.877000 * East-bound Longitude: -121.567300
Date/Time Start: 2022-12-17T15:49:00 * Date/Time End: 2022-12-21T00:44:00
Minimum DEPTH, water: 22.0 m * Maximum DEPTH, water: 814.0 m
Event(s):
SO295_0_Underway-2 * Latitude Start: 14.022800 * Longitude Start: -125.912800 * Latitude End: 26.877000 * Longitude End: -121.567300 * Date/Time Start: 2022-12-17T15:49:00 * Date/Time End: 2022-12-21T00:44:00 * O2A Registry URI: hdl:10013/sensor.8d073178-2ec8-4cbd-9548-e0cb29439d27 * Campaign: SO295 (Nodule Monit. II) * Basis: Sonne_2 * Method/Device: Vessel mounted Acoustic Doppler Current Profiler [75 kHz] (VMADCP-75) * Comment: VMADCP_75kHz
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DATE/TIMEDate/TimeKopte, RobertGeocode
2LATITUDELatitudeKopte, RobertGeocode
3LONGITUDELongitudeKopte, RobertGeocode
4DEPTH, waterDepth watermKopte, RobertGeocode
5Current velocity, east-westCur vel Ucm/sKopte, RobertVessel mounted Acoustic Doppler Current Profiler [75 kHz] (VMADCP-75)
6Current velocity, north-southCur vel Vcm/sKopte, RobertVessel mounted Acoustic Doppler Current Profiler [75 kHz] (VMADCP-75)
7Quality flag, current velocityQF cur velKopte, RobertSeadatanet flag: Data quality control procedures according to SeaDataNet (2010)UV QC flag meanings= 0:unknown, 1:good_data, 2:probably_good_data, 3:potentially_correctable_bad_data, 4:bad_data, 5:not_used, 6:not_used, 7:nominal_value, 8:interpolated_value, 9:missing_value
8Echo intensity, relativeEcho int relctsKopte, RobertVessel mounted Acoustic Doppler Current Profiler [75 kHz] (VMADCP-75)
9Pings, averaged to a double ensemble valuePings per ens#Kopte, RobertVessel mounted Acoustic Doppler Current Profiler [75 kHz] (VMADCP-75)
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:
2118875 data points

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