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History
Balloon satellite
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A balloon satellite, sometimes referred to as a "satelloon", is a satellite inflated with gas after it has been put into orbit.
Explorer 24 satellite
Explorer 24 satellite
Test inflation of PAGEOS
Test inflation of PAGEOS
Project Echo
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Project Echo was the first passive communications satellite experiment. Each of the two American spacecraft, launched in 1960 and 1964, were metalized balloon satellites acting as passive reflectors of microwave signals. Communication signals were transmitted from one location on Earth and bounced off the surface of the satellite to another Earth location.
Echo 1 sits fully inflated at a Navy hangar in Weeksville, North Carolina.
Echo 1 sits fully inflated at a Navy hangar in Weeksville, North Carolina.
Echo 2
Echo 2
Holmdel Horn Antenna, constructed for Project Echo, and later used to discover the cosmic microwave background radiation.
Holmdel Horn Antenna, constructed for Project Echo, and later used to discover the cosmic microwave background radiation.
T. Keith Glennan shows LBJ aluminized Mylar film used to make Echo I
T. Keith Glennan shows LBJ aluminized Mylar film used to make Echo I