Three Dimension Wind Retrieval of Single-Doppler Radar Data with Improved VVP Method

Theoretically, three dimension (3D) wind field and the other kinematical parameters could be retrieved by the volume velocity processing (VVP) method using single-Doppler weather radar volume data. However, ever since the theory was brought forward, it has never been fully and truly applied to practice due to the large vertical speed error. This research has found that the ill coefficient matrix of the linear equations is the key obstacle in retrieving the vertical speed field and other parameters. Based on the numerical analysis theory, the feasible algorithm has also been studied as an attempt to solve the ill matrix problem in linear equations. Numerical experiments have also been conducted with single-Doppler radar data, and the retrieval results are verified with dual-Doppler radar data observed in HUBEX_IOP. The research results show that the better retrieval of three dimension wind field can be obtained with the improved VVP method. Especially, the retrieval of vertical speed is obviously much better than that of the previous studies, and consistent with the real vertical wind speed of severe weather.