Title

Hull-mounted ADCP from French Oceanographic Vessels

Date (Creation)

2014-01-01T00:00:00

Citation identifier

FR-330-715-368-00032-IFR_ADCP

Citation identifier

DOI:10.12770/60ad1de2-c3e1-4d33-9468-c7f28d200305

Abstract

Validated and aggregated data from current profilers measured continuously by hull-mounted ADCPs (Acoustic Doppler Current Profiler).

Credit

IFREMER, IRD

Status

On going

Point of contact

Organisation name	Individual name	Electronic mail address	Role
IFREMER		sismer@ifremer.fr	Author
IFREMER		sismer@ifremer.fr	Publisher

Maintenance and update frequency

As needed

Place

• Worldwide Coverage

GEMET - INSPIRE themes, version 1.0

• Oceanographic geographical features

Thèmes Sextant

• /Human Activities/Oceanographical Cruises

Discipline

• Current meters

• En-route ship measurement

AtlantOS Element

• Networks

Centre de données ODATIS

• CDS-SISMER

Type de jeux de donnée ODATIS

• /Observational data/in-situ

Thématiques - SIMM

• /Environmental Status/Hydrodynamics

• Research

Sous-regions marines

• /France

Ocean Hackathon - Ville et défi

• /Toulon

ODATIS aggregation parameters and Essential Variable names

• Currents

Use limitation

CC-BY (Creative Commons - Attribution)

Access constraints

License

Use constraints

Copyright

Spatial representation type

Vector

Denominator

50000

Language

Français

Character set

UTF8

Topic category

• Oceans

Reference system identifier

EPSG / WGS 84 (EPSG:4326) / 7.9

Topology level

Geometry only

Distribution format

Name	Version

OnLine resource

Protocol	Linkage	Name
WWW:DOWNLOAD	ftp://ftp.ifremer.fr/ifremer/coriolis/adcp	FTP ADCP
OGC:WMS	https://sextant.ifremer.fr/services/wms/sismer	CRUISES_ADCP
OGC:WFS	https://sextant.ifremer.fr/services/wfs/sismer	CRUISES_ADCP

OnLine resource

Protocol	Linkage	Name
DOI	https://doi.org/10.12770/60ad1de2-c3e1-4d33-9468-c7f28d200305	DOI of the dataset

Hierarchy level

Dataset

Statement

The data were acquired by IFREMER and IRD oceanographic vessels.

Data are controlled and validated by SISMER following a defined protocol.

Description

The emitted acoustic wave reflects on the suspended matter and shifts its phase proportionally to the speed of the reflectors (Doppler effect). These particles are supposed to move at the speed of the water mass. A current is then calculated in the direction of each beam.

With the knowledge of the orientation of the sensor relative to the vessel, the orientation of the vessel relative to a land reference and the knowledge of the speed of the vessel, an absolute current can be calculated.

Rationale

Data acquisition

Description

The data are processed with the CASCADE software (Chaine Automatisée de Suivi des Courantomètres Acoustiques Doppler Embarqués). CASCADE is a software for validation and visualization of hull ADCP measurements initiated in 1998 at LPO (Laboratoire Physique des Océans - IFREMER) for its research needs in the processing and analysis of ADCP measurements and which is regularly updated.

It was then implemented in an operational mode by the SISMER data center.

It consists of a set of matlab programs.

Rationale

Data processing

Description

After processing the ADCP data with CASCADE software, data are available and downloadable in Netcdf format.

For one cruise, there will be:

1) 3 Netcdf files (or more, if different acquisition modes were analyzed with CASCADE)

- 1 raw data file *_0_osite.nc: It represents the concatenation of STA (or LTA) files from VMDAS. The currents are absolute or relative currents, expressed in the geographical reference frame and geo-referenced. They are accompanied by ancillary measurements to evaluate these data (amplitude of the echo received, error estimation, attitude and ship speed measurements, speed over the bottom). It therefore contains the raw U and V data flagged without modification of pitch, amplitude or alignment.

- 1 data file (1E.nc or 0E.nc), intermediate between the raw data and the final filtered data - they are validated, corrected and assigned by a quality information

- 1 file of validated (aggregated) data *_fhv*.nc: It represents the validated data, corrected, assigned a quality information (flag) and filtered.

2) 1 compressed file (in UNIX .tar format) of figures from the CASCADE software: This file contains figures (in .png format) of vectors, bathymetry, roads, various plots, ....

3) A report document available on Nautilus on the page of the concerned campaign.

The document contains all the cruises processed for a year and by ship if they are public. And for each cruise, the images collected during the data processing with the CASCADE software (path, bathymetry map, quality of the data received, percentages of good data, vector plots) and the problems encountered.

Rationale

Data dissemination

Metadata

File identifier

60ad1de2-c3e1-4d33-9468-c7f28d200305

Metadata language

Français

Other language

Language	Character encoding
English

Character set

UTF8

Hierarchy level

Series

Date stamp

2025-01-28T08:43:30.094359Z

Metadata standard name

ISO 19115:2003/19139 - SEXTANT

Metadata standard version

1.0

Metadata author

Organisation name	Individual name	Electronic mail address	Role
IFREMER		sismer@ifremer.fr	Local service desk