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Plazma-A In 1987 two experimental Plazma-A satellites (Cosmos 1818 and 1867) were launched with new-generation Topaz reactors. The spacecraft used the US-A first generation bus but tested new on-board systems being developed for the US-AM. These included new elements of the orientation system, and ion engines.

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© Mark Wade, 1997 - 2008 except where otherwise noted.