The embodiment of the invention provides an X-band
weather radar non-rainfall
data quality control method and
system. The method is applied to the technical field of weather radars and comprises the following steps: acquiring X-band
weather radar data; identifying and eliminating the
electromagnetic interference echo according to the continuity characteristic of the
electromagnetic interference echo and the distribution condition of the
correlation coefficient CC and the
differential reflectivity factor ZDR; judging whether the difference value of the
reflectivity factors of each echo point before and after hardware filtering is greater than a preset threshold value or not, and if so, marking the echo point as a rainfall echo; if not,
fuzzy logic recognition
elimination based on characteristic parameters is carried out; wherein the non-
precipitation echo probability PNPR and the
precipitation echo probability PPR of each echo point are calculated according to the characteristic parameters, whether the PNPR is larger than the PPR or not is judged, and if yes, the echo point is marked as a non-
precipitation echo; if not, non-rainfall weak echo discrimination is carried out; whether the echo is a non-rainfall echo is determined by comparing the
reflectivity factor mean value # imgabs0 #, the
correlation coefficient mean value # imgabs1 # of the
elevation angle of the whole layer of the echo and the ratio ValCC of the effective distance
library number of the correlation coefficients with a judgment threshold value, and if the echo is the non-rainfall echo, the echo point is marked as the non-rainfall echo; and if not, continuously filtering scatter and plaque
noise around the echo point by using the
reflectivity factors in the radial direction and the
azimuth to obtain the rainfall echo. In this way, the quality of
weather radar data can be improved.