The Raduga-1M satellites are military commmunication satellites. They
are improved versions of the Globus (Raduga-1) satellites
featuring modern multi-transponder transmission equipment working within centimetric- and
decimeter-wave bands, which ensures communication with mobile stations including mountain
hard-to-reach regions.
Raduga-1M is the geostationary component of the Integrated Satellite Communications System (ISSS), where they work in conjunction with the highly eccentric orbit (HEO) Meridian satellites.
The satellites features transponders in the L, C, X and Ka-bands. They are inserted directly into the geostationary orbit by the Proton-M Briz-M launch vehicle.