气象2018，Vol.44Issue(4)：511-517,7.DOI:10.7519/j.issn.1000-0526.2018.04.004
GVAD技术及其在新一代天气雷达中的应用
GVAD Technology and Its Application in CINRAD
摘要
Abstract
The gradient velocity azimuth display (GVAD) technology has been developed to get over the in-fluence of velocity aliasing in traditional velocity azimuth display (VAD) technology,which can calculate the vertical wind profiler (VWP) above the radar.This paper first introduced the theory of GVAD tech-nology and conducted simulation,and analyzed about the GVAD technology,and then applied it into the case of typhoon and severe precipitation monitored by CINRAD.The simulation result demonstrated that the GVAD technology can overcome the velocity aliasing effectively compared with the traditional VAD technology,and the added noise also can be depressed through low-pass filter.The influence of aliasing ve-locity was got over in the two cases,but the noise and fluctuation in radial velocity were enlarged by the gradient of radial velocity,which affected the retrieval accuracy of wind although the low-pass filter was a-dopted,especially,the retrieval accuracy of wind speed was impacted.In the examples,the retrieved wind speed by GVAD technology was 2-3 m·s-1less than the value by the traditional VAD technology.So,the influence of noise and fluctuation in CINRAD on GVAD technology should be further studied and reduced.关键词
GVAD技术/新一代天气雷达/速度模糊Key words
GVAD (gradient velocity azimuth display) technology/CINRAD/velocity aliasing分类
天文与地球科学引用本文复制引用
李瑞义,杨洪平,赵坤,李锐锋..GVAD技术及其在新一代天气雷达中的应用[J].气象,2018,44(4):511-517,7.基金项目
公益性行业(气象)科研专项(GYHY201506021)和灾害天气国家重点实验室开放课题(2016LASW-B17)共同资助 （气象）
