Transponder based. Multilaterating. Exact.
Wind turbines are equipped with obstruction lights to be visible in the dark for air traffic. Those obstruction lights blink from dusk till dawn, no matter if an aircraft is nearby or not. This constant blinking has proven to be an obstacle in the acceptance of wind power.
To stop the unnecessary blinking and to make the night sky dark again, there is a technology called Aircraft Detection Lighting System, ADLS for short.
Through ADLS, it is possible to turn off the blinking obstruction lights of wind farms. This is done by monitoring the airspace around a windfarm and only giving an activation signal towards the obstruction lights once an aircraft is in near vicinity.
Every flying object is obligated to send out transponder signals to be identifiable. Those are being received by the Light:Guard receivers.
The system receives continuous data from all receivers at once and is therefore able to achieve a higher network coverage than each individual receiver would by itself.
This leads to a better signal quality and higher light-off times for each wind turbine, especially in areas with high air traffic or large wind farms.