Beskrivning : Prognoz 2 was placed in a highly elliplical orbit with apogee 200,000 km, perigee 550 km, and inclination 65 degrees. It carried the first instrument package, SIGNE 1, resulting from the Franco-Soviet SIGNE collaboration. This instrument was intended to perform solar radiation studies. However, it detected cosmic gamma-ray bursts as well as solar events. It reentered the earths atmosphere on 15 December 1982.