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Notes:
These eight concepts were identified as most promising by NASA's Station Concept Development Group after the results of the 1982 contractor studies had been analyzed.
In March 1984, the Station Concept Development Group reduced the list to four concepts -- the “CDG 1 planar-array", ”streamline T", ”triangular delta-truss", and "power tower". A fifth, the “spinning array”, was retained as a candidate for a space resource module.
