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Cosmos 2541



The Tundra or EKS (Edinaya Kosmicheskaya Sistema) series of satellites is the next generation of Russian early warning satellites to replace the US-K and US-KMO early warning satellites of the Oko-1 system.

The development of the EKS started in 2000. The Russian Ministry of Defence awarded in 2007 a contract for the EKS system to RKK Energiya with a first test launch planned in 2009. Several problems, changing requirements and a court case led to long delays, postponing the first mission to the end of 2014.

Reportedly the Tundra satellites carry also a secure emergency communications payload to be used in case of a nuclear war.

They are launched on Soyuz-2-1b Fregat-M boosters into Molniya-orbits, inclined highly elliptical 12 h orbits.

The first Tundra satellite is to be launched in the last quarter of 2014 on a Soyuz-2-1b Fregat-M booster. Until 2020, six satellites are planned to be orbited.

The Russian Defense Ministry named the new satellite Kosmos 2541, keeping with the Russian military’s naming scheme for military spacecraft.

Alternate Names

  • Cosmos2541
  • 44552
  • Kosmos 2541
  • Tundra
  • EKS

Facts in Brief

Launch Date: 2019-09-26
Launch Vehicle: Soyuz-2.1b/Fregat
Launch Site: Plesetsk, Russia

Funding Agency

  • Unknown (Russia)


  • Surveillance and Other Military

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office

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