10.26165/JUELICH-DATA/P4GRTX Schlerf, Andreashttps://orcid.org/0000-0002-6789-7487(Technische Universität Braunschweig)Bretschneider, Lutzhttps://orcid.org/0000-0002-5384-6128(Technische Universität Braunschweig)Schuchard, Malte(Technische Universität Braunschweig)Düsing, Sebastian(Leibniz-Institut für Troposphärenforschung e.V.)Käthner, Ralf(Leibniz-Institut für Troposphärenforschung e.V.)Wehner, Birgit(Leibniz-Institut für Troposphärenforschung e.V.)Schuldt, Tobias(Forschungszentrum Jülich GmbH, ICE-3)Wesolek, Christian(Forschungszentrum Jülich GmbH, ICE-3)Tillmann, Ralfhttps://orcid.org/0000-0003-0648-6622(Forschungszentrum Jülich GmbH, ICE-3)Lange, Anne Carolinehttps://orcid.org/0000-0001-8027-5933(Forschungszentrum Jülich GmbH, ICE-3)Erraji, Hassnae(Forschungszentrum Jülich GmbH, ICE-3)Krüger, Thomas(Technische Universität Braunschweig)Scholz, Hendrik(Technische Universität Braunschweig)Frost, Paul(Technische Universität Braunschweig)Sobotta, André(Bundesanstalt für Straßenwesen (BAST))Baum, Anja(Bundesanstalt für Straßenwesen (BAST))Ebert, Volker(Physikalisch-Technische Bundesanstalt (PTB))Bohlius, Henning(Physikalisch-Technische Bundesanstalt (PTB))Nowak, Andreas(Physikalisch-Technische Bundesanstalt (PTB))Langner, Marcel(German Federal Environment Agency (UBA))Lampert, Astridhttps://orcid.org/0000-0003-1414-1616(Technische Universität Braunschweig) Jülich DATA 2024 In the project MesSBAR (Automated airborne measurement of pollution in the near-earth atmosphere in urban areas), unmanned aerial systems and specially adapted air quality measurement technology were developed to carry out measurements upwind and downwind of pollution sources in urban areas, industrial plants and traffic routes. To validate and optimise the measurement technology and flight systems, two short measurement campaigns were carried out in 2021 near Wesseling next to the motorway A555 (North Rhine-Westphalia - Germany). There, the Federal Highway Research Institute (BASt) operates two measurement containers next to the motorway, which were used for the validation. Various flight profiles were tested. It was found that only for vertical ascents at a constant speed, useful results of the air quality measurements could be determined. The measurement data from these flights are published in this data publication. Lange, Anne Caroline(Forschungszentrum Jülich GmbH, ICE-3)Tillmann, Ralf(Forschungszentrum Jülich GmbH, ICE-3)