Yamal 402

Yamal 402 is a Communications Satellite that is operated by Gazprom Space Systems and was manufactured by Thales Alenia Space, France. The spacecraft is based on the 4000-C3 satellite bus that is equipped with two deployable solar arrays and is capable of hosting powerful communication payloads. Yamal 402 has a liftoff mass of 4,463 Kilograms. The 10kW Communications Payload consists of 46 Ku-Band transponders forming four fixed communications beams: a Russian beam, a Northern, Southern and a European Beam. Yamal 402 also features a steerable beam. The vehicle provides interbeam connection capability to provide high flexibility. The satellite has 36, 54 and 72MHz transponders. Two solar arrays and onboard batteries form the electrical system of the satellite.

The vehicle is equipped with an S400 Propulsion System for apogee burns and larger orbit maintenance maneuvers. The S400 series built by EADS Astrium are bi-propellant engines using Monomethylhydrazine and Mixed Oxides of Nitrogen as propellants.

Depending on the version used, S400 provides 420 to 425 Newtons of Thrust with a specific impulse of 318-321 seconds. In addition, Yamal 402 is equipped with four SPT-100 plasma thrusters. The Stationary Plasma Thrusters provide 83 Millinewtons of thrust each. The spacecraft will operate from 55 degrees East in Geostationary Transfer Orbit and it has an operational lifetime of 11 years.