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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...