Accurate Wind Measurement at Sea

Project Overview


Develop a metocean data measurement buoy to accurately quantify the energy resources (especially the wind resource measured with an embedded LIDAR) at offshore wind project sites. This R&D program allowed the development of the Accurasea company which markets the floating LiDAR buoy.


  • Duration: 2 years (2014-2016)
  • Budget: 2.2 million euros

Technical guidelines

  • Carbon Trust OWA Roadmap for the commercial acceptance of floating lidars
  • IEA Wind Task 32


Logo Pôle Mer Méditerranée
Logo Pôle Mer Bretagne-Atlantique
Logo Pôle Derbi

Financial support

Logo FUI
Logo Bpifrance
Logo Région Bretagne
Logo Région Haute Normandie

Design principles

Badge Lidars


BLIDAR can host any lidar, including Leosphere's Windcube V2, the ZephIR 300M, or Mitsubishi Electric's Diabrezza V2

Badge Accuracy


BLIDAR's primary mission is to accurately measure wind in all conditions found at offshore wind project sites worldwide.

Badge Modular


BLIDAR's design includes a common core and adaptable parts to minimize buoy motion in local sea conditions.

Badge Sensor range

Sensor range

In addition to wind measurements, BLIDAR also provides wave, current and environmental data.

Badge Shipping


BLIDAR can be shipped in standard shipping containers, which facilitates its transport by truck or cargo ship.

Badge Reliability


BLIDAR is targetting maximum reliability, through redundancy, multiple communication channels and structural protection.

Consortium members

Logo Eolfi

EOLFI is an independent, end-to-end specialist of wind power. Established in France, Poland and Taiwan, EOLFI is active in businesses covering the whole value chain of renewable energies: onshore, floating offshore and solar projects development, investment fund management, and R&D.

Eolfi is the project leader. It is in charge of wind analysis and the organization of the onshore and offshore test campaigns.

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Logo nke

nke Instrumentation designs, manufactures and sells instruments and systems for the monitoring of seawater and freshwater. nke Instrumentation is involved in several research projects, both nationally and internationally, and works in partnership with scientific institutions such as Ifremer and CNRS.

nke Instrumentation is in charge of the design and the manufacturing of the BLIDAR system, which is also equipped with some of its sensors.

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Logo Ifremer

Created in 1984, The French Research Institute for Exploitation of the Sea or Ifremer is a public institute. Ifremer conceives and operates tools for observation, experimentation and monitoring, and manage the oceanographic databases.

The Technology Research and Development unit located in its Brittany Center in Brest (France) is actively involved in BLIDAR. It brings maritime expertise and provides testing facilities to the project.

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Formed in 2001 by ESIGELEC with the support of manufacturers and institutional bodies, IRSEEM (Embedded Electronic Systems Research Institute) has quickly developed collaborative research with its partners and transfers technologies to regional sectors in the automobile, aviation, electronics, telecommunications and energy industries. These activities are focused on a theme which is important for all these industries – embedded systems.

IRSEEM supervised data acquisition during the onshore test campaigns. It is also in charge of developing algorithms to correct measured data from buoy motion and to calculate wave parameters.

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Project Timeline

Related links

OWA Roadmap Document

Carbon Trust OWA Roadmap

Floating LIDAR technology has the potential to replace meteorological met masts for the measurement of primary wind resource data – wind speed and wind direction for a fraction of the cost.

The Carbon Trust Offshore Wind Accelerator has published a roadmap for commercial acceptance of floating LIDAR technology. This document describes three stages of commercialisation in terms of accuracy and availability KPIs. It also explains how measurement uncertainties decrease as a floating LIDAR device moves from Stage 1 (baseline) through to Stage 2 (pre-commercial) and finally Stage 3 (commercial).

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Offshore Validation Campaign

BLIDAR will conclude its two-year research program by an offshore campaign to validate the performance of a scale 1:1 prototype.

Main characteristics:

6 months
Reference wind device
fixed lidar placed on a nearby island

The verifications involved will include:

  • The comparison of the wind data measured by the two lidars (embedded in the buoy VS fixed on the island)
  • The comparison of the wave parameters calculated by the buoy with those measured by a nearby reference buoy
  • An all-around check of the buoy's deployability, availabilty, maintainability and safety.

The background picture shows the Tillamook Rock Light (OR, USA)