The Netherlands Ministry of Defence (MoD) has selected Raytheon to supply wind turbine mitigation technology to help alleviate effects caused by wind turbines on ASR-10SS primary surveillance radar (PSR) system located at the Royal Netherlands Air Force’s (RNLAF) Woensdrecht air base.

The ASR-10SS radar is being used as RNLAF’s air traffic control system.

The ASR-910B radar, being used as primary surveillance radars at RNLAF air force bases in Leeuwarden, Twenthe and Soesterberg, are also affected to varying degrees by wind turbines within line of sight.

Application of the mitigation technology will allow wind turbines to be safely located near radar facilities while also significantly improving the radar’s ability in detecting aircraft targets that are present above and beyond the wind farms.

Raytheon’s Network Centric Systems business surveillance director Ed Sullivan said the elimination of interference caused by the wind turbines supports the RNLAF in carrying out its mission safely and securely.

"Raytheon’s solution will enable the Royal Netherlands Air Force (RNLAF) and the energy provider to continue to operate in harmony," Sullivan added.

Upgrades to the PSR will include a combination of hardware and software changes to the radar system, which will also facilitate extension of a nearby wind farm without impacting flying operations at the base.

Rotating blades of the wind turbines generate large, moving, false targets that flood the radars making it difficult for controllers to distinguish between false and genuine aircraft targets.

The mitigation technology will be made operational for the first time by the end of 2012.

RNLAF’s Woensdrecht base has two multiple turbine wind farms located within 12km and four within a 25km range.

The wind turbine blades use stealth technology and are also being developed to mitigate radar reflection problems for aviation worldwide.