新一代雙偏振天氣雷達(CINRAD/SAD)精細化探測技術
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Fine Detection Technology of New Generation Dual Polarization Weather Radar (CINRAD/SAD)
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    摘要:

    新一代雙偏振天氣雷達在暴雨、臺風等災害性天氣監測和預警中發揮了重要的作用。隨著氣象現代化發展以及預報時效性、精細化度的要求不斷提高,S波段新一代雙偏振天氣雷達已不能充分滿足發展過程迅速的中小尺度天氣系統的研究、預警。氣象雷達的時空分辨率對探測強對流過程中小尺度結構有重要作用,提高天氣雷達時空分辨率是精細化探測技術的關鍵,本文著重從新一代天氣雷達的時空分辨率、體掃方式等方面,通過對天氣雷達脈沖重復頻率、信號處理方法及掃描方式等進行改進,提高新一代雙偏振天氣雷達對中小尺度氣旋和龍卷風等災害性天氣的探測能力,以獲取快速變化的天氣過程精細化特征,獲得更新更快、分辨率更高的觀測資料。

    Abstract:

    The new generation of dualpolarized weather radar plays an important role in the monitoring and early warning of severe weather such as heavy rainall and typhoons. With the development of meteorological modernization and the increasing requirements for timeliness and refinement, the Sband new generation dualpolarization weather radar cannot fully meet the needs of rapid development of researches and the early warning of small and mediumscale weather systems. The spacetime resolution of meteorological radar plays an important role in detecting smallscale structures in strong convection. Improving the temporal and spatial resolution of weather radar is the key to refined detection technology. This paper focuses on the temporal and spatial resolution of the new generation weather radar and the antenna sweeping method so as to improve the weather radar pulse repetition frequency, signal processing and scanning methods, to improve the capability of a new generation dualpolarized weather radar to detect catastrophic weather such as small and mediumsized cyclones and tornadoes and to get more accurate observations with faster refinement of weather processes.

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汪章維,陳昊,袁圣,王志成.新一代雙偏振天氣雷達(CINRAD/SAD)精細化探測技術[J].氣象科技,2020,48(3):331~336

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  • 收稿日期:2019-06-10
  • 定稿日期:2019-12-10
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  • 在線發布日期: 2020-06-18
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