part of Salyut programme

Salyut 6 (Russian: ?????-6; lit. Salute 6), DOS-5, was a Soviet orbital space station, the eighth station of the Salyut programme. It was launched on 29 September 1977 by a Proton rocket. Salyut 6 was the first space station to receive large numbers of crewed and uncrewed spacecraft for human habitation, crew transfer, international participation and resupply, establishing precedents for station life and operations which were enhanced on Mir and the International Space Station.
Salyut 6 was the first "second generation" space station, representing a major breakthrough in capabilities and operational success. In addition to a new propulsion system and its primary scientific instrument—the BST-1M multispectral telescope—the station had two docking ports, allowing two craft to visit simultaneously

In June 1979, the Progress-7 spacecraft delivered the KRT-10 radiotelescope to the Salyut-6 space station, where the telescope was deployed by cosmonauts and operated from July 18 to August 9, 1979. The KRT-10 features a 10-m mirror antenna assembled in situ from separate sections and is designed to receive weak signals in the 12-cm and 72-cm bands. From an altitude of 400 km, the resolution of the telescope with respect to the earth is 7 km in the 12-cm band. Radiotechnical, astrophysical, and geophysical experiments carried out with KRT-10 are briefly discussed.