Real-time retrieval of the wind from aliased velocities measured by Doppler radars

Doppler radar measurements provide the radial wind within an unambiguous in terval due to the limited value of the sampling frequency (pulse repetition frequency). Many algorithms have been developed to retrieve true wind velo cities from measured aliased wind velocities. However, these algorithms are time consuming, which can be a constraint in an operational context. Besid es, most of them need independent information on the wind generally provide d by complementary neighbor measurements such as radiosonde or wind profile r. This paper describes a new method aimed at providing an estimate of the real wind directly from aliased wind measurements without prior dealiasing, allowing the method to be used in real time by operational radars without additional information from other instruments. A potential application of t he method is to provide a reference wind profile that can be used, in a sec ond step, to dealias radial velocities.