what was its mission?
After engine cut-off, PS-1 separated from the second stage and the satellite's transmitter was activated. These signals were detected at the IP-1 station by Junior Engineer-Lieutenant V.G. Borisov, where reception of Sputnik 1's "beep-beep-beep" tones confirmed the satellite's successful deployment. Reception lasted for two minutes, until PS-1 fell below the horizon.
Sputnik 1
At 19.9 seconds after engine cut-off, PS-1 separated from the second stage and the satellite's transmitter was activated. These signals were detected at the IP-1 station by Junior Engineer-Lieutenant V.G. Borisov, where reception of Sputnik 1's "beep-beep-beep" tones confirmed the satellite's successful deployment. Reception lasted for two minutes, until PS-1 fell below the horizon. The Tral telemetry system on the R-7 core stage continued to transmit and was detected on its second orbit.
when did the u.s.s.r launch the first satellite to orbit the world 4 October 1957 who was the chief constructor of it? Sergei Korolev
wiki:19663446
Sputnik 1 [SEP] Launch and mission
This resulted in an initial orbit of by , with an apogee approximately lower than intended, and an inclination of 65.1 degrees and a period of 96.2 minutes. A fuel regulator in the booster also failed around 16 seconds into launch, which resulted in excessive RP-1 consumption for most of the powered flight and the engine thrust being 4% above nominal. Core stage cutoff was intended for T+296 seconds, but the premature propellant depletion caused thrust termination to occur one second earlier when a sensor detected overspeed of the empty RP-1 turbopump. There were of LOX remaining at cutoff. At 19.9 seconds after engine cut-off, PS-1 separated from the second stage and the satellite's transmitter was activated.