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We present results of in situ measurements of mesosphere–lower\udthermosphere dusty-plasma densities including electrons, positive ions and\udcharged aerosols conducted during the WADIS-2 sounding rocket campaign. The\udneutral air density was also measured, allowing for robust derivation of\udturbulence energy dissipation rates. A unique feature of these measurements\udis that they were done in a true common volume and with high spatial\udresolution. This allows for a reliable derivation of mean sizes and a size\uddistribution function for the charged meteor smoke particles (MSPs). The mean\udparticle radius derived from Schmidt numbers obtained from electron density\udfluctuations was ∼ 0.56 nm. We assumed a lognormal size distribution\udof the charged meteor smoke particles and derived the distribution width of\ud1.66 based on in situ-measured densities of different plasma constituents.\udWe found that layers of enhanced meteor smoke particles' density measured by\udthe particle detector coincide with enhanced Schmidt numbers obtained from\udthe electron and neutral density fluctuations. Thus, we found that large\udparticles with sizes  > 1 nm were stratified in layers of\ud ∼ 1 km thickness and lying some kilometers apart from each\udother

Estimate of size distribution of charged MSPs measured in situ in winter during the WADIS-2 sounding rocket campaign