Citation:

PANGAEA.935640

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Abstract:

Upper-ocean velocities along the cruise track of Sonne cruise SO280 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 1.44 s. The ship's velocity was calculated from position fixes obtained by the Global Positioning System (GPS). 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. 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 (-0.85° +/- 0.8385°) and scale factor (1.0000 +/- 0.0131) of the Ocean Surveyor signal. The average interval was set to 60 s.

Other version:

nc file: ADCP current measurements (75 kHz) during RV SONNE cruise SO280

Data processing report:

Kopte, Robert (2021): ADCP current measurements (75 kHz) during RV SONNE cruise SO280 - Data Processing Report. Institute of Geosciences, Kiel University, so_280_vmadcp_75khz_01_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: 38.359455 * Median Longitude: -18.703888 * South-bound Latitude: 31.956200 * West-bound Longitude: -22.288600 * North-bound Latitude: 46.987900 * East-bound Longitude: -13.404300

Date/Time Start: 2021-01-11T08:57:00 * Date/Time End: 2021-02-01T13:33:00

Minimum DEPTH, water: 22 m * Maximum DEPTH, water: 814 m

Event(s):

SO280_0_Underway-2 * Latitude Start: 47.985600 * Longitude Start: -10.765500 * Latitude End: 37.575600 * Longitude End: -13.401700 * Date/Time Start: 2021-01-10T19:18:00 * Date/Time End: 2021-02-01T13:34:00 * Campaign: (GPF 20‐3_087H) * Basis: * Method/Device:

Comment:

Velocity quality flagging is based on following threshold criteria: abs(UC) or abs(VC) > 2.0 m/s, rms(UC_z) or rms(VC_z) > 0.3.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DATE/TIME	Date/Time		Kopte, Robert		Geocode
2	LATITUDE	Latitude		Kopte, Robert		Geocode
3	LONGITUDE	Longitude		Kopte, Robert		Geocode
4	DEPTH, water	Depth water	m	Kopte, Robert		Geocode
5	Current velocity, east-west	Cur vel U	cm/s	Kopte, Robert	Vessel mounted Acoustic Doppler Current Profiler [75 kHz] (VMADCP-75)
6	Current velocity, north-south	Cur vel V	cm/s	Kopte, Robert	Vessel mounted Acoustic Doppler Current Profiler [75 kHz] (VMADCP-75)
7	Quality flag, current velocity	QF cur vel		Kopte, Robert	Calculated	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
8	Echo intensity, relative	Echo int rel	cts	Kopte, Robert	Vessel mounted Acoustic Doppler Current Profiler [75 kHz] (VMADCP-75)
9	Pings, averaged to a double ensemble value	Pings per ens	#	Kopte, Robert	Vessel 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:

13576330 data points

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