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The first tier of the Zvezda network was declared operational in 1972.
The Zvezda network was conceived at the military research institute 45 SNII.
Parabolic antennas for the Zvezda network were installed at existing GRU sites equipped with the Krug system.
The GRU operates one of the Russian satellite eavesdropping networks called Zvezda.
The GRU's Zvezda network traces its origins back to the early 1960s.
Zvezda was initially led by Yevgeniy G. Kolokolov and later by Stepan I. Ternovoi in 1974.
The Zvezda site in Yakovlevka and the site in Irkutsk are still active.
The Zvezda installations in Ukraine transferred to the Ukrainian Foreign Intelligence Service in 2004.
Military Unit 51428 was built in Zagoryanskiy in the Shcholkovo region in 1966 to serve as the headquarters of the Zvezda network.
The 4th Main Directorate of the Ministry of Defense was responsible for the Zvezda network.
The GRU's 6th Directorate was involved in the development of the Zvezda network.
The KGB established its own dedicated network of satellite listening stations following its involvement with the Zvezda network.
The initial goal of the Zvezda network was to construct three SIGINT sites.
The annexation of Crimea in 2014 allowed the establishment of a new Zvezda facility in Sevastopol.
Nine units of the Zvezda network are positively identified to remain operational today.
The Zvezda network was approved by a Communist Party and government decree signed on June 30, 1965.
The Ventspils site was chosen to build one of the first Zvezda sites close to the western border of the USSR.
NASA engineers are reviewing the analysis of other segments of the ISS based on observations of the cracks in the Zvezda module.
The health of the ISS is a potential threat to its operational schedule, particularly due to air leaks in the Zvezda service module.
Preliminary results of the investigation into the Zvezda module's air leak are expected by the end of March.