Glonass-K1 are the third generation of satellite design for GLONASS satellite navigation system. GLONASS is a Russian space-based navigation system comparable to the similar GPS and Galileo systems. This generation improves on accuracy, power consumption and design life. Each satellite is unpressurized and weighs 935 kg, and has an operational lifetime of 10 years. This launch also carries Mozhayets-6 (Kosmos 2596), a small experimental satellite built by the Mozhaiskiy Military Space Academy of St. Petersburg. September 13, 2025 at 02:10 UTC · Launch Successful Soyuz 2.1b Fregat — Russian Space Forces, to Medium Earth Orbit 43/3 (43L), Plesetsk Cosmodrome, Russian Federation The world's 7061st orbital launch attempt, and 212th of 2025. Data: Launch Library 2, The Space Devs. Image by Roscosmos (Roscosmos Image Use Policy) via The Space Devs.