US-KMO

This article is about the missile detection spacecraft, for the scientific satellites see Prognoz SO-M

US-KMO

Operator	MO SSSR (1991) MO RF (1991—)
Mission type	Missile defence
Carrier rocket	Proton-K/DM-2
Launch site	Baikonur Cosmodrome
Mass	2154 kg
Orbital elements
Regime	Geosynchronous

Upravlyaemy Sputnik Kontinenty Morya Okeany (Russian: Управляемый Спутник Континенты Моря Океаны meaning Controllable Satellite - Continents, Oceans, Seas), or US-KMO (Russian: УС-КМО), also known as SRPN-2 (Russian: СПРН-2) and Prognoz, is a series of Russian, previously Soviet missile defence early warning satellites operating in geosynchronous orbit as part of the Oko programme. The first prototype satellite was launched on 8 October 1975, atop a Proton-K/DM-2 carrier rocket. It is unrelated to the earlier Prognoz SO-M programme. The satellites have the GRAU index 71Kh6.

Prognoz satellites operate in Geosynchronous orbits, typically around 35,750 kilometres above the Earth's equator. As of 27 June 2008, sixteen satellites are in orbit. The most recent was launched on 26 June 2008.

Typically, two active satellites are kept on station, one at 24°W, and one at 12°E. Backup satellites are located at 80°E and 12°E.

In February 2008 Russia unilaterally withdrew from the Ukrainian-Russian intergovernmental agreement on SPRN signed in 1997, connected to the dispute about the early warning Dnepr radars in Ukraine.

See also

• Oko