vkntmoodboard:NASA ECHO II S-131 / “Project Echo
Friday, 22 February 2019 19:22![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
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vkntmoodboard:
NASA ECHO II S-131 / “Project Echo was the first passive communications satellite experiment. Each of the two American spacecraft, launched in 1960 and 1964, was a metalized balloon satellite acting as a passive reflector of microwave signals. Communication signals were bounced off of them from one point on Earth to another.”
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vkntmoodboard:
NASA ECHO II S-131 / “Project Echo was the first passive communications satellite experiment. Each of the two American spacecraft, launched in 1960 and 1964, was a metalized balloon satellite acting as a passive reflector of microwave signals. Communication signals were bounced off of them from one point on Earth to another.”
(Your picture was not posted)
