Tereshkova's backup was Irina Solovyova, with Ponomaryova in a supporting 'second back-up' role.
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Ponomaryova established herself one of the leading candidates with Valentina Tereshkova and Irina Solovyova, and a joint mission profile was developed that would see two women launched into space, on solo Vostok flights on consecutive days.
Irina Borzova | Irina Bokova | Irina Allegrova | Princess Irina Alexandrovna of Russia | Irina Viner | Irina Brook | Irina Solovyova | Irina Saari | Irina Rodnina | Irina Pantaeva | Irina Livezeanu | Irina Kupchenko | Irina Ionesco | Irina Demick | Irina Alfyorova | Irina | Tsarevna Irina Mikhailovna of Russia | Princess Irina Nikolaïevna Orlova | Princess Irina Nikolaievna Orlova | Irina Valyukevich | Irina Shayk | Irina Safarova | Irina Rodina | Irina Ratushinskaya | Irina Privalova | Irina Papkova | Irina Negrea | Irina Muravyova | Irina Lenskiy | Irina Krush |