GSS, formerly known as Gazcom, already operates a cluster of three Yamal telecoms satellites in orbit.
The Yamal-300K satellite, built by Russia’s Reshetnev space company, will be launched by in Kazakhstan on November 3.
The satellite is fitted with a combined payload including eight active 72 MHz transponders in C-band and eighteen active 72 MHz transponders in Ku-band.
Yamal-300K service zone covers 95% of the Russian territory.
"The next launch is scheduled for December 8,” Sevastyanov said on the sidelines of the Open Innovations forum in Moscow. "It will be the Yamal-402 satellite.”
A Yamal-402 satellite, built by Thales Alenia Space, will also be launched by Proton-M from Baikonur.
The satellite is equipped with 46 Ku-band transponders providing for the coverage zone over the most part of the territory of Russia, CIS, Europe, Middle East and Africa.
GSS is planning to have fully-fledged Yamal satellite network in orbit by 2020.