A system for deriving benefits from the reception and processing of composite video signals by a hand-held device, such as a smart card. During operation of the wind energy installation, parameters are measured with spatial andor temporal resolution on the side of the wind energy installation facing the wind, said parameters describing the wind conditions in the measurement region, preferably the wind speed andor the wind direction. A helical time period may then be determined and used as a helical revolution in a helical pixel representation.