Survey reconnaissance satellite project of KB Yuzhnoye worked on 1964-1967. The DS satellites of KB Yuzhnoye (Chief Constructor V M Kovtunenko) were used to solve problems related to the planned Yantar series. But Yuzhnoye was too busy building ICBM's for the RSVN (Soviet Rocket Forces). So Kozlov's Filial 1 of OKB-1 took up the project after a delay in 1967 to 1969. Succeeded by Kozlov's Yantar-1KF. Was to have been derived from Soyuz-R manned spacecraft.

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