Microburst precursor detector utilizing microwave radar

G - Physics – 01 – S

Patent

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G01S 13/95 (2006.01)

Patent

CA 2107586

A microburst precursor detector utilizes a multiplicity of radar beams (1-4) and samples radar returns, in each beam, from meteorological radar signal reflectors and processes (16) the signal returns in a statistical manner to determine average radar reflectivity and to extract doppler signal parameters. These parameters are utilized to determine a second set of parameters; average doppler frequency within each radar beam, doppler spectral spread within each radar beam, and the skewness of the doppler spectrum in each beam. The second set of parameters is processed (18-20) to establish the existence of a microburst, predicted surface impact, time to impact, wind shear surface location and track, and the magnitude of the wind shear.

Un détecteur de signes précurseurs de microrafales "microburst" utilise une multiplicité de faisceaux de radar (1-4), échantillonnedans chaque faisceau des informations de radar provenant de réflecteurs de signaux de radar météorologique, et traite (16) les signaux d'informations sur une base statistique afin de déterminer le pouvoir réfléchissant moyen du radar et d'extraire des paramètresde signaux Doppler. Ces paramètres sont utilisés pour déterminer un second ensemble de paramètres: la fréquence Doppler moyenne dans chaque faisceau de radar, l'étendue spectrale Doppler dans chaque faisceau de radar et l'obliquité du spectre Doppler dans chaque faisceau. Le second ensemble de paramètres est traité (18-20) afin d'établir l'existence d'une micorafale, l'impact prévu à la surface, le temps restant avant l'impact, l'emplacement et la trajectoire à la surface du cisaillement du vent et l'ampleur du cisaillement du vent.

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