The Space Congress® Proceedings 1966 (3rd) The Challenge of Space Mar 7th, 8:00 AM Communications System Utilizing Passive Satellites Robert T. Hart Collins Radio Company Follow this and additional works at: https://commons.erau.edu/space-congress-proceedings Scholarly Commons Citation Hart, Robert T., "Communications System Utilizing Passive Satellites" (1966). The Space Congress® Proceedings. 5. https://commons.erau.edu/space-congress-proceedings/proceedings-1966-3rd/session-1/5 This Event is brought to you for free and open access by the Conferences at Scholarly Commons. It has been accepted for inclusion in The Space Congress® Proceedings by an authorized administrator of Scholarly Commons. For more information, please contact
[email protected]. COMMUNICATIONS SYSTEMS UTILIZING PASSIVE SATELLITES Robert T. Hart Collins Radio Company Dallas, Texas Summary Dallas, Texas. The geographical locations of the sta tions permitted mutual visibility on many passes The era of communications systems utilizing with the passive satellites was inaugurated by the launch of satellite at an orbital height of approximately 700 miles. Operational Echo I in 1960. This was followed by Echo II in 1964. frequencies in the S-band region These preliminary experiments have proven system were chosen for maximum radio reflectivity of the sat feasibility and indicated deficiencies of the satellite ellite consistent with available equipment in the ground station materials and configurations. Echo III will be launched complex. in the spring of 1966 to test the latest available A set of disappointing circumstances caused the materials. Echo II satellite to be less than a perfect radio reflec This paper outlines the history of the passive tor, primarily due to ejection of the balloon from the satellite communications experiments to date and canister.