Kosmos 637
Success
MAR 26197413:35:00 UTCFirst Proton launch with Block DM upper stage, first Soviet launch to geosynchronous orbit, boilerplate payload.
LIFTOFF
MAR 26 197413:35:00 UTC
Success
launched from Pad 81/23 Baikonur
aboard Proton K/DM 8K82K/11S86 282-01 into GSO
Payload
Kosmos 637 (Raduga GVM)
Test flight