High resolution reconnaissance satellite project worked on by KB Yuzhnoye 1964-1967. Was to have been derived from Soyuz-R manned spacecraft. 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 very different Yantar-2K.

• 102 - Voevodin, Sergey A, VSA072 - Space Apparatus, "Sergey A. Voevodin's Reports", . HTML when accessed: http://www.mcs.net/~rusaerog/sergeyv/VSA.html
• 445 - Melnik, T G, Voenno-Kosmicheskiy Siliy, Nauka, Moscow, 1997..