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A new era in space communication opened on, April 12 1961. On that day the Soviet cosmonaut major Yuri Gagarin - the first. Man in space - travelled around the Earth at the velocity of 17 000 miles, per hour at altitude ranging from 181 to 327, kilometers. The radio-controlled spaceship named Vostok was equipped with two-way radio transmitters operating on short and ultra-short. Waves. These transmitters enabled the cosmonaut to send signals to the Earth. What was the cosmonaut 's pulse? Temperature?? What were the altitudes of the spaceships? Electronic communication received the answers to these questions via radio radar,,, And telemetry.German Titov was the second Soviet cosmonaut who on, August, 6 1961 rode the, spaceship Vostok 2 seventeen times around. The Earth in 25 hours and 11 minutes. German Titov communicated with the Earth by radiophone. He travelled at altitude ranging. From 178 to 244 km.