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Advancements in Remote Sensing Technology for Wind Measurements

This presentation by Dr. Jeremy Bass focuses on remote sensing technologies, specifically LIDAR and SODAR, for wind measurement applications in offshore and onshore settings. It discusses a study conducted in East Coast England utilizing the WINDCUBE Lidar and Triton Sodar, highlighting their data collection capabilities and performance. LIDAR is favored for its high-quality data, while Sodar is more suitable for preliminary site assessments. The significance of proper siting and the implications of atmospheric conditions on data accuracy are also emphasized, guiding future applications.

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Advancements in Remote Sensing Technology for Wind Measurements

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  1. RES View of Remote Sensing Technology: 2011 Dr Jeremy Bass, MInstP, MIOA SENIOR TECHNICAL MANAGER 10-11 May 2011, EWEA WRAT Workshop, Brussels, Belgium 1

  2. ROTSEA • East coast England • 80m fixed mast • Generally uncomplicated site • WINDCUBE Lidar (LeoSphere) • Triton Sodar (SecondWind) • 4 weeks of concurrent data – Summer 2010 • Very good agreement between all devices 2

  3. Preferred Devices #1: LIDAR - LeoSphere WindCube V2 • excellent onshore & offshore • can use for climatic conditions and site assessment - big plus • use for high quality, high value, mission critical measurements • able to return high quality data up to higher elevations, 160 m • by virtue of 4 beams, over-determined system and so some redundancy • no echo rejection required - can position very close to mast • limited experience with NatPoCo ZephIR - not keen on CW operational mode • need aerosols! 3

  4. Preferred Devices #2: SODAR – SecondWind Triton • only use onshore • only use for site assessment - no meaningful climatic condition data • power supply not required - low power is principle benefit! • Triton appears to have better echo rejection algorithms than AQS500, if correctly orientated. Can locate ~ 50m from mast • need thermal stratification/turbulence – not good in neutral conditions • data capture in different conditions of atmospheric stability? • only meaningful data up to 100 m • use more for exploratory, qualitative analysis • how do they perform far offshore/low turbulence sites? • previous good experience with AQS500 SODAR - let down by power supply 4

  5. Siting & Applications • Appropriate Siting: • onshore - use in relatively simple terrain only • offshore – LIDAR only • no confidence in performance in complex terrain or near forestry • no confidence in CFD-correction approach (keen to learn!) • Current Applications: • shear verification, where short masts • offshore - improved wind shear extrapolation offshore, e.g. where significant tower shadow effects • Experimental, e.g. for noise & power performance

  6. Questions/Comments: power supply issues still critical to success might be useful internally, but need to consider Bank's Engineer’s view! never loose sight of the benefits of a meteorological mast instead! 6

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