The present application relates to the field of
weather radar, and more particularly to a
zenith rotating dual-polarization
radar calibration and diagnosis method,
system, device and medium, wherein the method comprises: if a preset trigger condition is met, controlling the
radar antenna to perform vertical pointing to the
zenith; driving the
radar antenna to perform
azimuth rotation scanning, collecting polarization base data with
azimuth full-circle distribution characteristics and radial height level characteristics; filtering out interference echoes and non-liquid
precipitation echoes by screening and cleaning the polarization base data, obtaining a
reference analysis sample; performing multi-
dimensional modeling on the
reference analysis sample to separate out fluctuation errors, obtaining calibration characteristic quantities and using them for online data compensation, and according to the comparison result of the standard deviation profile of the
reference analysis sample and the theoretical accuracy index, mapping and identifying the hardware component state of the radar to output diagnosis information. Thus, while improving the calibration accuracy of the dual-polarization radar, the present application significantly enhances the accurate diagnosis capability of the deterioration risk of the radar bottom components.