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Published online by Cambridge University Press: 04 August 2017
Three groups, one at Ames Research Center, one at the Jet Propulsion Laboratory, and one at Stanford University are currently engaged in the research and development phase of the NASA SETI program Other papers in this session will describe in greater detail some of the work going on at each of these centers. It is my intent here to give an overall picture of the program so that the other papers may be viewed in context.