Overview
The DeTect Harrier Aircraft Detection Lighting System (ADLS) enables lights to be illuminated as aircraft approach a wind farm. Lights are extinguished once the aircraft leaves the area. The DeTect system typically uses two radar and is operational at three North American sites with more in the pipeline. DeTect’s first European system is set to go live in Germany this summer with further systems on the horizon in Germany and elsewhere in Europe.
Figure 1 DeTect Radar Installation at Offut Air Force Base Nebraska
Who are DeTect?
DeTect is a US company based in Panama City, Florida. It supplies local radar systems for detecting birds, aircraft and drones. It has a European sales office in West Sussex, England.
How does the system work?
Wind Turbine Lights can have a significant visual impact at night – particularly in a dark environment. Turbines taller than 150 metres need to be lit at night due to national and international rules and legislation. National legislation is sometimes amended to allow lights to be switched on only when aircraft are detected in the vicinity of the wind farm.
The DeTect system has local primary surveillance radar, similar to the one pictured above, that detect approaching aircraft – sending a switching signal to illuminate lights fitted to wind turbine nacelles.
The radar itself has a range of up to 24 miles which satisfies the typical requirement to illuminate turbines when aircraft are detected within 3-4 nautical miles.
What other mitigation techniques are there?
Other techniques for mitigating the impact of lights at night include:
- Not illuminating all turbines
- Replacing normal lights with infra-red lights
- Reducing light intensity
- Designing lights to minimise downward spill
- Automatically reducing light intensity in good visibility
How can Pager Power help?
We can help with:
- Radar siting studies
- Discussing requirements with regulators and military authorities
- Evaluating mitigation proposals
- Providing pilot’s view fly-by simulations
- Mitigation advice
For more information contact Mike Watson at Pager Power on +44 1787 319001
References
https://detect-inc.com/aircraft-detection-lighting-systems/
https://www.pagerpower.com/news/terma-radar-controlled-lighting/
https://publicapps.caa.co.uk/docs/33/DAP01062017_LightingWindTurbinesOnshoreAbove150mAGL.pdf
Image accreditation: https://images.app.goo.gl/ZuT946gu4efcHevf6
2 Comments
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Does a two radar systems reduce false activation due to weather, such as humidity, rain and snow?
Our windfarm has only one radar in the Harrier system and is regularly activated due to weather conditions.-
Dear John,
Thank you for getting in touch.
This will really depend on the radar type and purpose.
If you are able to tell us a bit more about this we can advise further.
Many thanks,
Kai
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