COMPASS-2 was the first micro-satellite of the Russian Space Agency’s low orbiting system. Its aim was to investigate the geodynamics-related effects in the ionospheric plasma. The project was coordinated by IZMIRAN RAS, and Polish CBK PAN in Warsaw was a co-investigator of the Compass-2 experiments. The satellite was launched on May 26, 2006. The CBK PAN had also constructed the radio frequency analyser for plasma wave diagnostics. The instrument was based on digital technology of signal detection and was operating in range: 0.1-20MHz.