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contributor authorMatrosov, S. Y.
contributor authorKropfli, R. A.
date accessioned2017-06-09T17:23:00Z
date available2017-06-09T17:23:00Z
date copyright1993/10/01
date issued1993
identifier issn0739-0572
identifier otherams-842.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4227511
description abstractIt has been shown previously that the use or elliptically polarized radar signals can help to obtain polarization signatures from tenuous cirrus clouds. Estimates of particle dimension ratios and orientations can be made in situations where conventional circular and linear polarizations fail because of weak echoes in one of the received polarization channels. One way of achieving elliptical polarizations is to install a quarter wave plate before the radar transmitter. This paper introduces two new easily measurable elliptical polarization parameters. These parameters are 1) the depolarization ratio for elliptical polarizations that slightly differ from the circular polarization, and 2) the difference in quarter wave plate angular positions that provide equal returns in both received polarization channels. The use of the elliptical depolarization ratio increases echo in the ?weak? channel without significant change of echo in the ?main? channel. This ratio is used to estimate ice particle deformity (deviation from sphericity). The second suggested parameter can be measured during continuous rotations of the quarter wave plate. It can be used to estimate the combined effect of the degree of common alignment of the ice crystals and their deformity. Operational procedures and possible data interpretations are discussed with emphasis on cloud sensing with Ka-band radar.
publisherAmerican Meteorological Society
titleCirrus Cloud Studies with Elliptically Polarized Ka-band Radar Signals: A Suggested Approach
typeJournal Paper
journal volume10
journal issue5
journal titleJournal of Atmospheric and Oceanic Technology
identifier doi10.1175/1520-0426(1993)010<0684:CCSWEP>2.0.CO;2
journal fristpage684
journal lastpage692
treeJournal of Atmospheric and Oceanic Technology:;1993:;volume( 010 ):;issue: 005
contenttypeFulltext


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