MIMOSA (MIcroMeasurements Of Satellite Accelerations) is a small Czech scientific satellite which has been developed for the Astronomical Institute of Czech Academy of Sciences by the Czech company Space Devices. On its board, there is a sensible accelerometer intended for measuring the nongravitational forces, which are caused by atmospheric drag, solar radiation and terrestrial infrared radiation. The satellite will be launched on 30 June 2003 at 16:15:12 CEST from the Russian cosmodrome Plesetsk to a low earth orbit reaching the height of 320 km at perigee and 820 km at apogee, inclined at 96.8° to the equator. The main goal of the mission is to study the atmospheric density in the height domain 200-700 km that affects low flying satellites, causing them to burn up as they finally reenter the atmosphere (e. g. Sputnik, Skylab, Mir). The satellite Mimosa will be controlled from the ground facility at Panska Ves, situated in the northern part of the Czech Republic.