Mercury

Mercury, also known as Advanced Vortex, was a series of three United States spy satellites launched in the 1990s. These satellites were launched and operated by the National Reconnaissance Office with the participation of the United States Air Force. The satellites collect SIGINT from near-geosynchronous orbits. Their precise mission and capabilities are highly classified, but they are widely believed to be successors to the Vortex/Chalet satellites.

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Advanced Vortex
reconnaissance satellite, 
Ashkenaz, Calvinist Republic of Ghent, Chinland, Democratic Republic of the Congo, Havilah, Kingdom of Martabam-hongsawatoi, Kingdom of Wolaita, Persia, Sikh Confederacy, Sweden, Tarshish, Dong Fang Hong 2, Ekran, reconnaissance satellite, Republic of Haiti, [[Mercury|]], 

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