Kosmos 347
Introduction '''Kosmos 347''' ( meaning ''Cosmos 347''), known before launch as '''DS-P1-Yu No.35''', was a Soviet satellite which was launched in 1970 as part of the Dnepropetrovsk Sputnik programme. It was a  spacecraft, which was built by the Yuzhnoye Design Bureau, and was used as a radar calibration target for anti-ballistic missile tests.
Launch Kosmos 347 was launched from Site 86/4 at Kapustin Yar, atop a Kosmos-2I 63SM carrier rocket. The launch occurred on 12 June 1970 at 09:30:02 UTC, and resulted in the successful deployment of Kosmos 347 into low Earth orbit. Upon reaching orbit, it was assigned its Kosmos designation, and received the International Designator 1970-043A.
Orbit Kosmos 347 was the thirty-third of seventy nine DS-P1-Yu satellites to be launched, and the thirtieth of seventy two to successfully reach orbit. It was operated in an orbit with a perigee of , an apogee of , 48.4 degrees of inclination, and an orbital period of 107.1 minutes. It remained in orbit until it decayed and reentered the atmosphere on 7 November 1971.
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