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RADAR MITIGATION


These techniques range from propagation algorithms to analysis of the complex way in which a wind turbine reflects radar and radio signals. The company has developed a unique method, CLOUDSiS, for modelling the impact of wind turbines on meteorological or weather radars.


As a company with diverse research facilities and specialist knowledge, QinetiQ is therefore uniquely positioned to work with windfarm developers to maximise the number of consented windfarms, whilst ensuring the accuracy and quality of radar service is unaffected.


RADAR IMPACT ASSESSMENT METHOD


The company’s radar impact assessment method is the first to achieve Météo-France validation, having successfully modelled interference caused by an existing windfarm. The team used its CLOUDSiS software to produce predicted data which was then compared side-by-side with confirmed measurements taken at two windfarms in Normandy by Météo-France.


The test confirmed that the software is able to predict radar interference with the high degree of accuracy required by the French Government.


Dr. Thierry Le Gall, Technology Exploitation Manager at QinetiQ, said: “France has faced a dilemma when seeking to build new windfarms. New turbines cannot be approved until their potential impact on weather radar is fully understood, but until now there has been no satisfactory way of predicting their impact before they are built.”


“QinetiQ has demonstrated that, using expertise and technology originally developed for military applications, it is possible to accurately model the effect that a proposed site will have on meteorological readings. This is a big step in enabling France to increase its adoption of renewable energy, while offering Météo-France assurance that this progress will not harm its ability to make accurate weather forecasts.”


SUCCESSFUL MODEL Since the successful validation of CLOUDSiS in November 2015 QinetiQ has worked with developers planning windfarms around ten Météo-France radars assessing the viability of approximately 280MW of planned onshore wind projects. A key part of the success of the model is the flexibility to optimise the yield of projects, whilst ensuring the radar impacts are acceptable.


As well as work on weather radar the Radar Impact Assessment team is experienced in assessing the impacts on most civil and military surveillance systems in line with relevant industry guidelines (e.g. Eurocontrol, OPERA, CAA CAP764, CAA CAP670).


Typical systems studied include…


• Primary Surveillance Radar (PSR) such as Air Traffic Control (ATC), en-route and Air Defence (AD) systems


• Secondary Surveillance Radars (SSRs)


• Aviation navigation aids


(e.g. ILS, DME, VOR and AGA VHF communications)


• Shipping radars • Telecommunications


QinetiQ’s operational experts, including former air traffic controllers and weather radar experts, provide expert opinion on operational impacts and mitigation options to assist windfarm developers and aviation/weather radar stakeholders in the windfarm planning process.


TAILORED STUDIES


Results and scenario illustrations are shared in Google Earth format allowing stakeholders to understand the impacts and solutions. Every study QinetiQ undertakes is tailored to the project specific impacts and to meet the concerns of the customer.


QinetiQ


Click to view more info = Click to view video


www.windenergynetwork.co.uk


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