Observation of Precipitation and Drop-Size Distribution Associated with a Typhoon using VHF Radar

Observation of Precipitation and Drop-Size Distribution Associated with a Typhoon using VHF Radar

This paper describes some of the microphysical and kinematic properties of precipitating systems associated with a typhoon using Chug-Li VHF radar. In order to gain a better understanding of these mechanisms and the vertical structure of the precipitation associated with a typhoon at different stages of development, an analysis has been carried out of the radar back-scattered signal in order to...

Mean Drop Size and Drop Size Distribution in a Hanson Mixer-Settler Extraction Column

Polarimetric Radar Rain Estimation through Retrieval of Drop Size Distribution Using a Bayesian Approach

This study proposes a Bayesian approach to retrieve raindrop size distributions (DSDs) and to estimate rainfall rates from radar reflectivity in horizontal polarization ZH and differential reflectivity ZDR. With this approach, the authors apply a constrained-gamma model with an updated constraining relation to retrieve DSD parameters. Long-term DSD measurements made in central Oklahoma by the t...

Trmm Precipitation Radar and Its Observation Results

あらまし 熱帯降雨観測衛星(TRMM:Tropical Rainfall Measuring Mission)は,1997年 11月 28日に打 ち上げられて以来,現在に至るまで,約 10 年以上も順調に,熱帯・亜熱帯降雨の観測を継続している.TRMM は,世界で初めてのアクティブフェイズドアレー方式の降雨レーダ(PR)を搭載しており,台風などをはじめ とする様々な降雨システムの三次元構造の観測にその威力を発揮してきた.論文では,TRMM 衛星のミッショ ンの目的,搭載センサの概要,TRMM降雨レーダシステムの概念設計時の諸検討,TRMM降雨レーダシステ ムの概要,TRMM降雨レーダデータ解析処理アルゴリズムシステム,様々な観測成果(台風,潜熱加熱など), TRMMを継承する全球降水観測計画(GPM:Global Precipitation Measurement)主衛星搭載 2周波...

Drop size ambiguities in the retrieval of precipitation profiles from dual-frequency radar measurements

The threat of flooding from landfalling tropical cyclones is a function of the local variation in rain rate and rain accumulation. To date, these have been inferred from single-frequency radar reflec-tivity measurements. However, the Tropical Rainfall Measuring Mission experience has confirmed that one of the main difficulties in retrieving rain profiles using a single-frequency radar is the un...