Frank Helleis

Civil Aircraft for the regular investigation of the atmosphere based on an instrumented container: The new CARIBIC system

C. A. M. Brenninkmeijer, Paul J. Crutzen, F. Boumard et al. · Atmospheric chemistry and physics · 2007 · 357 citations · Full text

Engineering, Environmental Monitoring, Air Pollution Measurement +18

Model Calculations of Aerosol Transmission and Infection Risk of COVID-19 in Indoor Environments

Jos Lelieveld, Frank Helleis, Stephan Borrmann et al. · International Journal of Environmental Research and Public Health · 2020 · 213 citations · Full text

Human Aerosol Emissions, Covid-19 Epidemiology, Covid-19 +17

Particulate trimethylamine in the summertime Canadian high Arctic lower troposphere

Franziska Köllner, Johannes Schneider, Megan D. Willis et al. · Atmospheric chemistry and physics · 2017 · 113 citations · Full text

Upper Atmosphere, Engineering, Air Quality +19

Twin-plate Ice Nucleation Assay (TINA) with infrared detection for high-throughput droplet freezing experiments with biological ice nuclei in laboratory and field samples

Anna T. Kunert, Mark Lamneck, Frank Helleis et al. · Atmospheric measurement techniques · 2018 · 72 citations · Full text

Engineering, Molecular Biology, Polar Environments +18

Application of a multi-laser tunable diode laser absorption spectrometer for atmospheric trace gas measurements at sub-ppbv levels

R. Kormann, Hubertus Fischer, C. Gurk et al. · Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy · 2002 · 57 citations

Sub-ppbv Levels, Spectroscopy, Laser Spectroscopy +6