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RES View of Remote Sensing Technology: 2011

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. ROTSEA. East coast England 80m fixed mast Generally uncomplicated site. WINDCUBE Lidar (LeoSphere) Triton Sodar (SecondWind)

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RES View of Remote Sensing Technology: 2011

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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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