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Keywords: Col Bradford Parkinson USAF official photo.png en USAF Colonel Bradford Parkinson official photo As head of the Joint Program Office JPO for the Defense Navigation Satellite System DNSS he was instrumental in leading the formulation and development of the NavSTAR Global Positioning System GPS 1977-07-20 US Air Force USAF other versions PD-USGov Uploaded with UploadWizard Global Positioning System |