Dnepropetrovsk Sputnik, a series of scientific and technology development satellites Istrebitel Sputnik, "Fighter Satellite", a series of antisatellite weapons and targets Tyazhely Sputnik, "Heavy Satellite", a failed Venus probe Upravlyaemy Sputnik, "Controllable Satellite", a series of ocean surveillance and missile detection satellites US-A, nuclear-powered ocean radar surveillance satellites US-K, molniya orbit missile detection satellites US-KS, geosynchronous orbit missile detection satellites US-KMO, Modernised geosynchronous orbit missile detection satellites US-P, electronic ocean surveillance satellites US-PM, modernised electronic ocean surveillance satellites