The Influence Of Inhomogeneous Wind Distribution On Data Quality Analysis For Wind Profiler

Horizontal wind measurement by wind profile radar (WPR) is based on assumption of uniform wind; however, this assumption cannot completely meet in the atmosphere, leading to the radar measurement error. Five-beam WPR can independently measure two groups of horizontal wind components U and V, using the motion difference to evaluate the influence of the inhomogeneity of the atmospheric motion on Wind Measurement. The influence on wind measurement can be divided into the inhomogeneous distribution of horizontal motion and vertical motion. Based on basic data of WPR and meteorological background information, a new means of coordinate rotation will make the two kinds of inhomogeneous factor separated, and then we can discuss their impact in different weather background. Combined with PB-type II troposphere WPR detection data from Yanqing Meteorological Observatory of Beijing, the feature of WPR data is analyzed, processing all continuous observation data Of 2012,except for some missing measurements.Results show that inhomogeneity of horizontal motion is nearly same in U and V direction, the inhomogeneity of horizontal motion and vertical motion influence wind measurement. And both influences are associated with changes of wind speed. In clear air, inhomogeneity of horizontal motion is the main influence on wind measurement because of small vertical velocity. In precipitation, the two influences on wind measurement are larger than that in clear air. Two kinds of radar measurement error are analyzed. Only slight modifications to the routine processing greatly improved results in these conditions. This study is the pre study for proposing reasonable algorithms to reduce the error of horizontal wind.