ERDDAP > info > M4_25_equ_8b26_1bc4_68bf

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Acces- sible	Title	Sum- mary	FGDC, ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
		data	graph		files	public	EQUIFy - Kincardine ADCP current velocity - M4 - Level 3 - V3.0		M	background			Plymouth Marine L...	M4_25_equ_8b26_1bc4_68bf

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	abstract	String	This dataset contains full depth observations of horizontal velocities recorded with a Nortek Signature 250 acoustic Doppler current profiler (250 kHz, 4 beam configuration) deployed upward facing on a seabed mounted instrument frame at site M4 in the northern North Sea, near the Kincardine Floating Offshore Wind Farm. The instrument collected 20 minute bursts at 1 Hz every hour, beginning at 21 minutes past the hour, and was deployed and recovered during the DY197 research expedition (RRS Discovery). The dataset spans 14 August 2025 at 17:21 UTC to 3 September 2025 at 15:21 UTC. The deployment location was 57.018289° N, â^'1.838832°E, and the instrument remained fixed for the duration of the deployment. These observations were collected as part of the NERC and Crown Estate funded ECOFlow programme, EQUIFy, Establishing a Framework for Quantifiable Evidence and Impact of Ecosystem Change Throughout the Lifecycle of UK Floating Offshore Wind Farms, grant number NE/Z504099/1. EQUIFy aims to co deliver a transferable monitoring and evidence framework that quantifies ecological impacts from future floating offshore wind development across spatial and temporal scales.
attribute	NC_GLOBAL	acknowledgement	String	EQUIFy is part of the NERC and Crown Estate funded ECOFlow programme, grant number NE/Z504099/1. The authors wish to thank the officers and crew of RRS Discovery, the NMF staff and the eSWEETS3 project for their assistance in collecting these data.
attribute	NC_GLOBAL	analytical_protocol	String	Raw Nortek Signature 250 files (.ad2cp) were converted to MATLAB format using Nortek Signature software. During conversion, the along beam velocities were transformed into Earth coordinate horizontal velocities (east and north) and vertical velocity, expressed in metres per second. All 1 Hz pings within each 20 minute burst were averaged to produce one hourly velocity profile. Final timestamps represent the start point of the 20 minute sampling window. The native bin structure of 46 depth cells at 2 m vertical resolution was retained. Velocity samples affected by strong sea surface echoes were removed to eliminate side lobe contamination in the upper part of the profile. The nearest bin to the transducer head also showed consistently high, comparatively elevated levels of vertical shear of the horizontal velocities squared, S2 (s 2), and relatively low beam correlations, so this bin was blanked. Compass corrections were applied using independently recorded VMADCP data from DY197. All processed variables are provided in Earth coordinates using standard SI units.
attribute	NC_GLOBAL	averaging	String	20-minute burst-averaged data
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	contact	String	jwi at pml.ac.uk
attribute	NC_GLOBAL	contributor_institution	String	Scottish Government's Marine Directorate; Environmental Research Institute - University of the Highlands and Islands; Plymouth Marine Laboratory
attribute	NC_GLOBAL	contributor_name	String	Rory O'Hara Murray, Benjamin Williamson, Matthew Palmer
attribute	NC_GLOBAL	contributor_role	String	Data collection/processing, Data collection; Funding
attribute	NC_GLOBAL	Conventions	String	COARDS, CF-1.6, ACDD-1.3
attribute	NC_GLOBAL	CreatedBy	String	Juliane Wihsgott
attribute	NC_GLOBAL	CreationDate	String	2025/12/22 14:20:19
attribute	NC_GLOBAL	creator_email	String	jwi at pml.ac.uk
attribute	NC_GLOBAL	creator_name	String	JWI
attribute	NC_GLOBAL	creator_type	String	institution
attribute	NC_GLOBAL	creator_url	String	https://www.pml.ac.uk
attribute	NC_GLOBAL	cruise	String	DY197
attribute	NC_GLOBAL	data_quality_comments	String	The instrument remained stable throughout the deployment due to the gimbal mounted frame, with no significant tilt or heading issues after compass correction. Beam correlations across most of the water column were consistent with expected performance for a 250 kHz Signature instrument. Minor near surface and near field data loss occurred, typical for upward facing ADCPs, and these effects were addressed during processing. The resulting profiles provide a reliable representation of the flow field.
attribute	NC_GLOBAL	date_range_human	String	14-Aug-2025 17:21 to 03-Sep-2025 15:21
attribute	NC_GLOBAL	geospatial_vertical_max	double	87.66022740474213
attribute	NC_GLOBAL	geospatial_vertical_min	double	-6.086306115371045
attribute	NC_GLOBAL	geospatial_vertical_positive	String	down
attribute	NC_GLOBAL	geospatial_vertical_units	String	m
attribute	NC_GLOBAL	infoUrl	String	https://www.ecoflow.org.uk/about
attribute	NC_GLOBAL	institution	String	Plymouth Marine Laboratory
attribute	NC_GLOBAL	keywords	String	03-sep-25, 14-aug-25, 20-minute, 250khz, 4-beam, above, acoustic, adcp, averaged, beam, bed, bedframe, bin, burst, burst-averaged, centre, centres, current, currents, data, depth, doppler, e-w, horizontal, instrument, laboratory, mab, marine, metres, minute, moored, n-s, north, observations, plymouth, positions, profiler, relative, sea, time, time2, velocities, velocity
attribute	NC_GLOBAL	Latitude	double	57.018289
attribute	NC_GLOBAL	license	String	Permission is granted to EQUIFy project partner institutes and interested parties to use this dataset for research and analytical purposes only. Redistribution, republication, or any form of data sharing with unauthorized third parties is strictly prohibited without prior written consent from the data owner. All users must acknowledge the source of the dataset in any publications or outputs.
attribute	NC_GLOBAL	long_title	String	Quality controlled observations of full-depth horizontal current velocities collected by a bottom mounted, upward facing Nortek Signature 250 acoustic Doppler current profiler
attribute	NC_GLOBAL	Longitude	double	-1.838832
attribute	NC_GLOBAL	metadata_version	String	0.1.0
attribute	NC_GLOBAL	processing_level	String	3
attribute	NC_GLOBAL	project	String	EQUIFy
attribute	NC_GLOBAL	sampling_protocol	String	A Nortek Signature 250 ADCP (250 kHz, 4 beam configuration) was deployed upward facing on a stable seabed mounted frame at site M4 (57.018289° N, â^'1.838832°E) in the northern North Sea near the Kincardine Floating Offshore Wind Farm. The instrument was deployed and recovered during the DY197 research expedition (RRS Discovery). The ADCP operated in burst mode to avoid interference with the alongside echosounder and passive acoustics. Each burst consisted of 1200 samples collected at 1 Hz over a 20 minute period. The ADCP sampled every 60 minutes and began at 21 minutes past each hour. Velocities were resolved across 46 bins with a 2 m bin size, providing depth resolved coverage from above the transducer head to the near surface, with standard blanking in the near field and occasional upper bin loss under energetic sea states. The four beam configuration provides horizontal velocity estimates through standard beam geometry and supports reliable full depth flow measurements. The deployment took place during the DY197 research expedition (RRS Discovery), and the instrument remained fixed throughout the deployment window.
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v70
attribute	NC_GLOBAL	summary	String	Moored (bedframe) 4-beam 250kHz Acoustic Doppler Current Profiler (ADCP) velocity observations, North Sea, 14-Aug-25 - 03-Sep-25. Data are 20-minute burst-averaged.
attribute	NC_GLOBAL	time_coverage_end	String	2025-09-02T15:21:00Z
attribute	NC_GLOBAL	time_coverage_start	String	2025-08-13T17:21:00Z
attribute	NC_GLOBAL	title	String	EQUIFy - Kincardine ADCP current velocity - M4 - Level 3 - V3.0
variable	mab		double
attribute	mab	_FillValue	double	-9999.0
attribute	mab	actual_range	double	2.5, 92.5
attribute	mab	ioos_category	String	Unknown
attribute	mab	long_name	String	Bin centre positions in metres above the bed (relative to the instrument)
attribute	mab	short_name	String	Metres above bed (relative to instrument)
attribute	mab	units	String	m
variable	time		double
attribute	time	_CoordinateAxisType	String	Time
attribute	time	actual_range	double	1.755105660001E9, 1.756826460001E9
attribute	time	axis	String	T
attribute	time	calendar	String	Gregorian
attribute	time	ioos_category	String	Time
attribute	time	long_name	String	Time replicated across bins for plotting
attribute	time	short_name	String	time_matrix
attribute	time	source_name	String	ddm
attribute	time	standard_name	String	time
attribute	time	time_origin	String	01-JAN-1970 00:00:00
attribute	time	units	String	seconds since 1970-01-01T00:00:00Z
variable	depth		double
attribute	depth	_CoordinateAxisType	String	Height
attribute	depth	_CoordinateZisPositive	String	down
attribute	depth	_FillValue	double	-9999.0
attribute	depth	actual_range	double	-6.086306115371045, 87.66022740474213
attribute	depth	axis	String	Z
attribute	depth	colorBarMaximum	double	8000.0
attribute	depth	colorBarMinimum	double	-8000.0
attribute	depth	colorBarPalette	String	TopographyDepth
attribute	depth	ioos_category	String	Location
attribute	depth	long_name	String	Depth of bin centres (relative to sea bed)
attribute	depth	positive	String	down
attribute	depth	short_name	String	dpt
attribute	depth	standard_name	String	depth
attribute	depth	units	String	m
variable	ve		double
attribute	ve	_FillValue	double	-9999.0
attribute	ve	actual_range	double	-0.4717608690261841, 0.4606117010116577
attribute	ve	ioos_category	String	Currents
attribute	ve	long_name	String	E-W horizontal velocities
attribute	ve	units	String	m s-1
variable	vn		double
attribute	vn	_FillValue	double	-9999.0
attribute	vn	actual_range	double	-0.782514214515686, 0.623484194278717
attribute	vn	ioos_category	String	Currents
attribute	vn	long_name	String	N-S horizontal velocities
attribute	vn	units	String	m s-1

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.