Effect of beam broadening on the VHF Doppler mini-radar simple method for correcting wind velocity errors

Physics

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Scientific paper

A Doppler VHF mini-radar has been developed at LSEET (Laboratoire de Sondages de l'Environnement Terrestre) to permit investigations at low altitudes, where classical large ST-VHF profilers are blind in the first kilometers of the atmosphere, and UHF boundary layer radars are disturbed by precipitations, birds and insects echoes. Due to a small size of the antenna array, beam broadening effects are important and can provide errors in the atmospheric parameter estimation (reflectivity and wind velocity). A simple overlapping correction method based on the decomposition of the power spectrum is employed to retrieve wind velocity profiles. Measurements from a high-resolution ST radar are used as a benchmark which allows data comparisons and evaluation of this new method.

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