STAC: balloon-borne experiments, atmospheric particles (aerosol) measurements, flight of 24 April 2011

The particles counter developped by the LMD (Laboratory of Dynamic Meteorology) in operation since 1995, is an in-situ instrument to measure the quantity of micrometric particles in the Earth's atmosphere. This instrument is embarked on balloons of the BSO type (Open Stratospheric Balloons). It gives the possibility to obtain profiles of the particles concentration in various classes of sizes, distributed between ~ 0.3 microns and a few microns in diameter, of the average troposphere and average stratosphere.