一 用途

上的降水粒子測量設(shè)備，此設(shè)備可以實時測量單個降水粒子（如，雨、雪、雹等）的大小、形狀、聚合狀態(tài)、方向和降落速度等。通過設(shè)備軟件，還可以計算降水率、降水量和降水粒子譜等。這些數(shù)據(jù)是充分理解大氣降水過程的關(guān)鍵要素，是研究和標定云雷達、降水雷達的*工具，適用于氣象和環(huán)境、電信和波傳播、工業(yè)應(yīng)用等領(lǐng)域。

二 原理

傳感器是由攝像頭和背光源組成，攝像頭將對測量區(qū)域的圖像進行線形掃描，將采集區(qū)域內(nèi)的圖像傳輸?shù)诫娮訂卧獌?nèi)處理存儲，然后用專業(yè)配套軟件進行一系列分析。

三 組成

設(shè)備由測量單元、筆記本電腦、供電單元三部分構(gòu)成。

四 產(chǎn)品特點

l 每個雨滴的前視圖

l 每個雨滴的側(cè)視圖

l 垂直降落速度

l 每個粒子的時間戳

l 雨滴直徑

l 估計雨滴的水平速度

l 令3D重建成為可能

l 降雨率與時間圖

l 雨滴粒子分布圖

l 垂直速度與等量直徑圖

l 扁率與直徑圖

l 評估單個降水粒子相態(tài)組成(固態(tài)、液態(tài)、融化、冰凍等)

l 小粒子分辨能力可達0.17mm，無大粒子尺度限制

l 時間戳分辨率達18μs

軟件主屏幕

單個粒子圖

降雨率與時間圖

垂直速度與等量直徑圖

雨滴水平速度圖

垂直速度與等量直徑分布圖

五 技術(shù)參數(shù)

l 垂直方向分辨率：優(yōu)于0.17 mm，veloc. < 10 m/s

l 垂直速率準確性：優(yōu)于4 %，veloc. < 10 m/s

l 采樣區(qū)域面積：100×100 mm²

l 尺寸：960 mm × 960 mm × 890 mm

l 測量單元與電腦遠距離：100 m

l 電腦功率：600 W

六 應(yīng)用領(lǐng)域

七 應(yīng)用案例

氣候條件下應(yīng)用2DVD觀測降雪數(shù)據(jù)

八 參考文獻

l Measurements of Precipitation Characteristics by a New Distrometer

M.Sch?nhuber1), H.E.Urban1), J.P.V.Poiares Baptista2), W.L.Randeu3) and W.Riedler 3)

1) Institute for Applied Systems Technology, JOANNEUM RESEARCH, Graz/Austria

2) ESA/ESTEC (XEP), Noordwijk, The Netherlands

3) Institute of Communications and Wave Propagation, Technical University Graz/Austria

l 2D VIDEO DISDROMETER: A STUDY OF DIFFERENT CLIMATIC REGIMES

YARITZA MEJIAS-ROLON

Undergraduate Student

University of Puerto Rico at Mayag?ez

Mayag?ez, Puerto Rico

DR. V.N. BRINGI

Professor

Colorado State University

Fort Collins, Colorado

l An example of computational approach used for aerodynamic design of a rain Disdrometer Un exemple de méthode de calcul utilisée pour le dessin aérodynamique d’un disdromètre de pluie

EMAD HABIB, Graduate Research Assistant, Iowa Institute of Hydraulic Research, The University of Iowa, Iowa City, IA, 52242 USA

WITOLD F. KRAJEWSKI, Professor, Iowa Institute of Hydraulic Research, The University of Iowa, Iowa City, IA, 52242 USA

l WEATHER RADAR VERSUS 2D-VIDEO-DISTROMETER DATA

M. Sch?nhuber1), H.E. Urban1), J.P.V. Poiares Baptista2), W.L. Randeu3) and W. Riedler3)

1) Institute for Applied Systems Technology, JOANNEUM RESEARCH, Graz/Austria

2) ESA/ESTEC (XEP), Noordwijk, The Netherlands

3) Institute of Communications and Wave Propagation, Technical University Graz/Austria

l OBSERVATIONS OF WINTER STORMS WITH 2-D VIDEO DISDROMETER AND POLARIMETRIC RADAR

Kyoko Ikeda*, Edward A. Brandes, and Guifu Zhang

National Center for Atmospheric Research, Boulder, Colorado

Real-time measurements and analyses of precipitation micro-structure and dynamics W. L. Randeu1,2, M. Sch¨onhuber1, and G. Lammer1

1Institute of Applied Systems Technology, Joanneum Research GmbH, Graz/Austria

2Institute of Communications and Wave Propagation, Technical University Graz, Austria

l DROP SIZE DISTRIBUTIONS IN OKINAWA, JAPAN, FROM 2D-VIDEO DISTROMETER AND C-BAND POLARIMETRIC RADAR

V.N. Bringi (1), K. Nakagawa (2), M. Thurai (1,2), H. Hanado (2), T. Iguchi (2)

Colorado State University, (2) Communications Research Laboratory, Japan

(thurai@crl.go.jp/: +1-970-491-2249)

l Investigation of rainfall microstructure and variability using vertically pointing radar and disdrometer M. Diederich1, S. Crewell1, C. Simmer1, and R. Uijlenhoet2

1Meteorological Institute University of Bonn

2Department of Environmental Sciences Wageningen University

l Z-R (Radar Reflectivity-Rain rate) relationships derived from Czech Distrometer data

Fiˇser

Institute of Atmospheric Physics, AS CR, Bocni II, 1401, 141 31 Prague, Czech Republic

l A Method For Estimating Rain Rate And Drop Size Distribution From Polarimetric Radar Measurements

Guifu Zhang, J. Vivekanandan, and Edward Brandes

National Center for Atmospheric Research

Research Application Program

P. O. Box 3000, Boulder, Colorado 80307

: 303-497-8402, : 303-497-8401

l Sensitivity of 5-cm Wavelength Polarimetric Radar Variables to Raindrop Axial Ratio and Drop Size Distribution

T. D. KEENAN

Bureau of Meteorology Research Cee, Melbourne, Victoria, Australia

L. D. CAREY

Colorado State University, Fort Collins, Colorado

D. S. ZRNIC′

NOAA/National Severe Storms Laboratory, Norman, Oklahoma

P. T. MAY

Bureau of Meteorology Research Cee, Melbourne, Victoria, Australia

(Manuscript received 16 November 1999, in final form 11 May 2000)

l Spurious power-law relations among rainfall and radar parameters By A. R. JAMESON1¤ and A. B. KOSTINSKI

1RJH Scienti. c, Inc., USA

2Michigan Technological University, USA

(Received 3 March 2001; revised 21 January 2002)

l EXPERIMENTAL AND NUMERICAL STUDIES OF SMALL-SCALE RAINFALL MEASUREMENTS AND VARIABILITY

W. F. Krajewski, A. Kruger and V. Nespor Iowa Institute of Hydraulic Research, The University of Iowa, Iowa City, Iowa 52242, USA

l NOTES AND CORRESPONDENCE When is Rain Steady

R. JAMESON RJH Scientific, Inc., El Cajon, California B. KOSTINSKI

Department of Physics, Michigan Technological University, Houghton, Michigan 24 November 2000 and 27 July 2001