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. We present a new method of analyzing measurements of mesosphericdust made with DUSTY rocket-borne Faraday cup probes. It can yield thevariation in fundamental dust parameters through a mesospheric cloud with analtitude resolution down to 10 cm or less if plasma probes give the plasmadensity variations with similar height resolution. A DUSTY probe was thefirst probe that unambiguously detected charged dust and aerosol particles inthe Earth's mesosphere. DUSTY excluded the ambient plasma by various biasedgrids, which however allowed dust particles with radii above a few nanometersto enter, and it measured the flux of charged dust particles. The fluxmeasurements directly yielded the total ambient dust charge density. We extend the analysis of DUSTY data by using the impact currents on its maingrid and the bottom plate as before, together with a dust charging model anda secondary charge production model, to allow the determination offundamental parameters, such as dust radius, charge number, and total dustdensity. We demonstrate the utility of the new analysis technique byconsidering observations made with the DUSTY probes during the MAXIDUSTYrocket campaign in June–July 2016 and comparing the results with those ofother instruments (lidar and photometer) also used in the campaign. In thepresent version we have used monodisperse dust size distributions.

A new method of inferring the size, number density, and charge of mesospheric dust from its in situ collection by the DUSTY probe