Valentina Tereshkova
Selection and training

Tereshkova had not expressed any particular desire to go into space before being recruited, Rather, her experience at skydiving contributed to her selection as a cosmonaut. After the flight of Yuri Gagarin in 1961, Nikolai Kamanin, director of cosmonaut training, read in the American media that female pilots were training to be astronauts. In his diary, he wrote, "We cannot allow that the first woman in space will be American. This would be an insult to the patriotic feelings of Soviet women." Approval was granted to place five female cosmonauts in the next group, which would begin training in 1963. To increase the odds of sending a Soviet woman into space first, the women cosmonauts began their training before the men. The rules required that the potential cosmonaut be a parachutist under 30 years of age, less than 170 cm (5 ft 7 in) in height, no more than 70 kg (154 lb) in weight. By January 1962, the All-Union Voluntary Society for Assistance to the Army, Air Force and Navy (DOSAAF) had selected 400 candidates for consideration. After the initial screening, 58 of those candidates met the requirements, which Kamanin reduced to 23. On 16 February 1962, Tereshkova was selected, along with four other candidates, to join the female cosmonaut corps.

Since they had no military experience, they started with the rank of private in the Soviet Air Forces. Training included isolation tests, centrifuge tests, thermo-chamber tests, decompression chamber testing, and pilot training in MiG-15UTI jet fighters. Tereshkova underwent water recovery training at sea, as part of which several motorboats were used to agitate the water, in order to simulate the rough conditions of space travel. She also began studying at the Zhukovsky Air Force Engineering Academy and graduated a few years after her flight. The group spent several months in basic training and, after they finished their training and passed an examination, Kamanin offered them the option to be commissioned as regular Air Force officers. With advice from the male cosmonauts, they chose to accept Kamanin's offer, as it would make it harder for the programme to get rid of them after the first flight. All five women became junior lieutenants in the Air Force in December 1962. Tatyana Kuznetsova became ineligible for the first flight due to illness, and Zhanna Yorkina was performing poorly in training, leaving Tereshkova, Irina Solovyova, and Valentina Ponomaryova as the leading candidates.

Originally, a joint mission profile was developed that would involve launching two women into space, on solo Vostok flights, on consecutive days in March or April 1963. It was intended that Tereshkova would launch first, in Vostok 5, while Ponomaryova would follow her into orbit in Vostok 6. However, this flight plan was altered in March 1963. Vostok 5 would now carry a male cosmonaut, Valery Bykovsky, flying alongside a woman aboard Vostok 6, both to be launched in June 1963. The State Space Commission, at their meeting on 21 May, nominated Tereshkova to pilot Vostok 6. Kamanin called her "Gagarin in a skirt." Soviet Premier Nikita Khrushchev was happy with the propaganda potential of her selection, since she was the daughter of a collective farm worker who had died in the Winter War; he confirmed her selection. Solovyova was appointed as her first backup. Tereshkova was promoted to lieutenant before her flight and to captain mid-flight.
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