Proton-M/Blok DM-2 was a four-stage configuration pairing the modernized Proton-M core with the Blok DM-2 upper stage. It flew six successful three-satellite GLONASS-M deployment missions between 2007 and 2010.
Proton-M/Blok DM-2 was a four-stage configuration pairing the modernized Proton-M core with the Blok DM-2 upper stage. It flew six successful three-satellite GLONASS-M deployment missions between 2007 and 2010.