A New X-band Weather Radar System with Distributed Phased-Array Front-ends: Development and Preliminary Observation Results  

作　　者：Xiaoqiong ZHEN Shuqing MA Hongbin CHEN Guorong WANG Xiaoping XU Siteng LI 

机构地区：[1]Meteorological Observation Center of China Meteorological Administration,Beijing 100081,China [2]College of Electronic Engineering,Chengdu University of Information Technology,Chengdu 610225,China [3]Institute of Atmospheric Physics,China Academy of Sciences,Beijing 100029,China [4]College of Earth and Planetary Sciences(CEPS),University of Chinese Academy of Sciences(UCAS),Beijing 100049,China [5]Eastone Washon Science and Technology Ltd.,Changsha 410000,China [6]Institute of Urban Meteorology,China Meteorological Administration,Beijing 100089,China

出　　处：《Advances in Atmospheric Sciences》2022年第3期386-402,共17页大气科学进展（英文版）

基　　金：supported by Natural Science Foundation of China(NSFC)(Grant No.31727901)。

摘　　要：A novel weather radar system with distributed phased-array front-ends was developed. The specifications and preliminary data synthesis of this system are presented, which comprises one back-end and three or more front-ends. Each front-end, which utilizes a phased-array digital beamforming technology, sequentially transmits four 22.5°-width beams to cover the 0°–90° elevational scan within about 0.05 s. The azimuthal detection is completed by one mechanical scan of0°–360° azimuths within about 12 s volume-scan update time. In the case of three front-ends, they are deployed according to an acute triangle to form a fine detection area(FDA). Because of the triangular deployment of multiple phased-array front-ends and a unique synchronized azimuthal scanning(SAS) rule, this new radar system is named Array Weather Radar(AWR). The back-end controls the front-ends to scan strictly in accordance with the SAS rule that assures the data time differences(DTD) among the three front-ends are less than 2 s for the same detection point in the FDA. The SAS can maintain DTD < 2 s for an expanded seven-front-end AWR. With the smallest DTD, gridded wind fields are derived from AWR data, by sampling of the interpolated grid, onto a rectangular grid of 100 m ×100 m ×100 m at a 12 s temporal resolution in the FDA. The first X-band single-polarized three-front-end AWR was deployed in field experiments in 2018 at Huanghua International Airport, China. Having completed the data synthesis and processing, the preliminary observation results of the first AWR are described herein.

关 键 词：phased-array weather radar multiple radar front-ends synchronized azimuthal scanning(SAS) data time differences(DTD) wind fields 

分 类 号：P412.25[天文地球—大气科学及气象学]