Main Centre for Reconnaissance of Situation in Space

The 821st Main Centre for Reconnaissance of Situation in Space (Russian: Главный центр разведки космической обстановки, tr. GTsRKO) is the headquarters of the Russian military's space surveillance network, SKKP. The centre is part of the Russian Space Forces and receives intelligence from a network of reporting stations which includes the Russian missile attack early warning network as well as some stations only used for space surveillance such as Okno and Krona.

The purpose of the SKKP is to detect satellites, identify them and to discern their orbits. It maintains the Russian catalogue of space objects and provides data which could be used to support space launches, feed an anti-satellite programme and provide intelligence on hostile military satellites. It is the Russian equivalent of the United States Space Surveillance Network.