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Here are details about a : Space commemorative cover or Space Cover.
Cosmodrom : Baikonur
Date of Cancellation: July 29, 1974
Printed: 150 units Kind of Event : Launch Launch pad : Baikonur KAZ
habité?/manned?: robot Mission type : Telecommunications
ou?/where?: au sol - ground
autographe?: non - none
Description : Molniya-1S was the first operating geostationary communications satellite of the Soviet Union.
After the Kosmos 637 dummy satellite was put into geostationary orbit, the Soviet Union launched a modified Molniya-1 satellite into GSO. This experimental satellite was built by NPO Prikladnoi Mekhaniki and was based on the operational Molniya-1 series.
Launch vehicle was the Proton-K Blok-DM instead of the Molniya-M Blok-ML, which was used for the high elliptical orbit version.