Sufficient advance warning time to switch off the wind farm or individual wind power plants if necessary
The reason is that the licensing authorities will require the implementation of a bird migration monitoring concept in the future as part of the planning approval decisions. The state of the art for radar systems, camera systems and automatic rangefinders were compared in the study on the basis of a market study and the threshold values required to switch off the wind farm were elaborated or discussed from an environmental point of view. For the development of the monitoring concept, current research results on bird migration over the Baltic Sea and the behaviour of the birds in the presence of obstacles were evaluated and included in the concept development.