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To publicize the launching of the first earth communications satellite, Echo 1, launched into orbit by the National Aeronautics and Space Administration on August 12, 1960, the first of a series of paper-thin-skinned, inflatable, passive communications satellites.

In August 1960, Echo 1 was launched into approximately 1600km circular orbit by the Thor Delta 1 launch vehicle, (also used to launch Telstar). Echo 1 was a 30m diameter balloon made of plastic, (Mylar) and coated with aluminium to aid signal reflection. Tests were carried out between California and New Jersey. Reflecting signals from Echo was a complete success. Used for experimental telephone, facsimile, (photographs and drawings) and data transmissions, Echo 1 began to change shape due to "memory" of the plastic form, which causes material to return to its prior condition.



Date of Issue - December 15, 1960

United States Space Stamps