The Atlas G also known as Atlas G Centaur-D1AR was an American expendable launch system derived from the Atlas-Centaur. It was a member of the Atlas family of rockets and was used to launch seven communication satellites during the mid to late 1980s. It was replaced by the Atlas I which had an improved guidance system.The first stage was derived from the SM-65 Atlas missile and a Centaur was used as the second stage. The first stage was also flown without the Centaur as the Atlas H.
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