Continuous further development in all areas of wind energy is one of the tasks of the Dirkshof in addition to project planning. Together with the Fraunhofer Institute for High Frequency Physics and Radar Techniques (FHR), the Dirkshof team is developing a concept for controlling the collision warning lights on wind turbines. The PARASOL system, which works on a passive radar basis, regulates the switching on of the warning lights only when an aircraft approaches. The system uses existing radio, TV and mobile phone signals and therefore does not emit its own radar radiation. No frequency allocation is required and the DVB-T, DAB plus or DVB-T2 networks used are available nationwide. This creates a particularly environmentally friendly and, above all, acceptance warning system. Since the end of 2013, the system has been successfully in service at the Reußenköge wind farm - initially in a prototype test phase. The antenna units are attached to the towers in protective covers, and state-of-the-art algorithm technology is used to analyse and simultaneously evaluate them to switch the obstacle lighting. The recognition of the first park was successfully completed in 2018. Now that it is sufficiently mature and technical system adjustments have been made, the next parking facilities for demand-driven night marking are planned for 2019.
