ADCP current measurements (75 kHz) during RV MARIA S. MERIAN cruise MSM103

DOI

Upper-ocean velocities along the cruise track of RV MARIA S. MERIAN cruise MSM103 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 1.43 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 (0.73° +/- 0.5865°) and scale factor (1.0041 +/- 0.0095) of the Ocean Surveyor signal. The average interval was set to 120 s.

Velocity quality flagging is based on following threshold criteria: abs(UC) or abs(VC) > 1.0 m/s, rms(UC_z) or rms(VC_z) > 0.3.

Identifier
DOI https://doi.org/10.1594/PANGAEA.945370
Related Identifier https://store.pangaea.de/Publications/Hoelz-etal_2022/msm_103_vmadcp_75khz_01.nc
Related Identifier https://doi.org/10.5281/zenodo.7525284
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.945370
Provenance
Creator Hölz, Sebastian; Kopte, Robert ORCID logo; Klein, Johanna
Publisher PANGAEA
Publication Year 2022
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Language English
Resource Type Dataset
Format text/tab-separated-values
Size 3486335 data points
Discipline Acoustics; Engineering Sciences; Mechanical and industrial Engineering; Mechanics and Constructive Mechanical Engineering
Spatial Coverage (-56.148W, 45.466S, -11.741E, 48.715N)
Temporal Coverage Begin 2021-09-15T10:30:00Z
Temporal Coverage End 2021-11-11T13:38:00Z