Tundra satellites

Tundra (EKS - 14F142)

Russia

Type / Application:	Early warning, communication
Contractors:	RKK Energiya (bus); TsNII Kometa (payload)
Operator:	-
Configuration:	USP Bus
Solar array	Deployable solar arrays
Lifetime:	-
Mass:	-
Orbit:	1626 km × 38552 km, 63.37°

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. Delayed to 2015.
Reportedly the Tundra satellites carry also a secure emergency communications payload to be used in case of a nuclear war.

Ref.: #7 - update: 28.05.20