Radar cross-section of a wind turbine: application to weather radars

We report RCS measurements of wind turbines in the C-band for both HH and VV polarizations. These show a common scattering mechanism between the two polarizations albeit with a large difference in amplitude. These results have a strong implication for polarimetric metrics used in weather radar algorithms. We thus highlight the need for dual-polarization radars or fine-grained simulations to properly assess the impact of wind turbines on weather forecast.