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The paper contains the results of the polarization measurements of twilightsky background during the wintertime including the epoch of Quadrantidsactivity in January 2008 and 2009 in Crimea (Ukraine). Analysis of the twilightsky polarization behavior had shown the barely detectable depolarization effectat the scattering altitudes above 90 km right after the Quadrantids maximum.This effect can be related with the meteoric dust in the upper atmosphere ofthe Earth.

Quadrantids 2008 and 2009: Detection of Dust in the Atmosphere by Polarization Twilight Sky Measurements