Q620661

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.

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spacecraft, artificial satellite, balloon satellite, National Aeronautics and Space Administration, 
Sikh Confederacy, Republic of Haiti, spacecraft, Ekran, Dong Fang Hong 2, balloon satellite, satellite, artificial satellite of the Earth, Tarshish, NASA, Persia, Kingdom of Wolaita, Kingdom of Martabam-hongsawatoi, Havilah, Democratic Republic of the Congo, Chinland, Calvinist Republic of Ghent, Ashkenaz, 

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Echo Prototype

T. Keith Glennan Shows LBJ Aluminized Mylar Flim Used to Make Echo I - GPN-2002-000025

Echo I 1960 Issue-4c

Horn Antenna-in Holmdel, New Jersey - restoration1

Stamp of Kazakhstan 299

Project Echo, spare canister for containing satellite - National Electronics Museum - DSC00583

Communications Satellite, Echo 1

• Innovative Telementoring for Pain Management: Project ECHO Pain - scientific article published in January 2014, Q1860, online

Type	Subtype	Date	Description	Notes	Source
commons	image		Echo Prototype		Commons
commons	image		T. Keith Glennan Shows LBJ Aluminized Mylar Flim Used to Make Echo I - GPN-2002-000025		Commons
commons	image		Echo I 1960 Issue-4c		Commons
commons	image		Horn Antenna-in Holmdel, New Jersey - restoration1		Commons
commons	image		Stamp of Kazakhstan 299		Commons
commons	image		Project Echo, spare canister for containing satellite - National Electronics Museum - DSC00583		Commons
commons	image		Communications Satellite, Echo 1		Commons