Abstract:The body scan data of Qingpu and Nantong stations on December 13,2017 and the single-station lattice CAPPI data are used in this paper to study the differences of radar echo intensity between the two stations by using the space-time consistency matching method and the single-station lattice data isometry method,and the possible errors of the two algorithms are analyzed.The results show that the isometric method of single station lattice data is superior to the spatiotemporal consistency matching method,and more suitable for the difference pair of adjacent radar echoes of single radar ladder scan data.When the radar-based data is correct,the error of space-time consistency matching method is mainly caused by the lack of real space-time matching consistency,and the error of the lattice data isometric method is mainly caused by the faultiness of the interpolation algorithm when generating lattice data.