Multi-Doppler processing for accurate estimation of updraft at low altitudes

A new method for three-axis wind field retrieval on multiple radar environment is proposed. The proposed method is designed especially to retrieve z-axis velocities in low altitudes with high accuracy by considering spatial correlation of wind velocities. A numerical simulation showed its advantage that the proposed method estimated z-axis velocities at a low altitude of 1500 m where the traditional method output an ambiguous wind field. It is expected that, even at low altitudes, the proposed method retrieves updrafts which are a key sign of thunderstorm initiation.