The NASA ATS-6 programme provided an oppportunity for assessment of the modulation techniques needed for future mobile communications programmes. It also gave rise to the evolvement of data collection and evaluation techniques. This 1970s documentary gives coverage of the May 1974 Cape Kennedy launch of the satellite, followed by a detailed and technical description of the various aeronautical and maritime communications experiments performed. Footage is provided of NASA's ATS Earthstations, the interfaces between ESA and NASA equipment, and the various experimental craft and centres.

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