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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.
Echo 2 – amerykański pasywny technologiczny satelita telekomunikacyjny mający postać balonu o średnicy 41,1 metrów wykonanego z aluminiowej folii mylarowej. Następca satelity Echo 1. Służył do testów łącznościowych (badania propagacji, technik komunikacyjnych, technik śledzenia) i geodezyjnych.
6 gru 2011 · The 135-foot rigidized balloon satellite was sent into orbit as a passive communications experiment by NASA on January 25, 1964. Echo II is shown here undergoing a tensile stress test in a dirigible hanger at Weekesville, North Carolina.
Echo 1, 1A, 2. The Echo satellites were NASA's first experimental communications satellite project. Each spacecraft was a large metallized balloon designed to act as a passive communications reflector to bounce communication signals transmitted from one point on Earth to another.
Echo, either of two experimental communications satellites launched into orbit around Earth by the National Aeronautics and Space Administration (NASA) during the 1960s. Consisting of aluminum-coated Mylar balloons that were inflated after launching, the Echo satellites were passive.
Communications Satellite, Echo 2. During the late 1950s and early 1960s, researchers considered two possible technologies for space satellite communications. One was "active" satellites, designed to receive a signal, amplify it, and then transmit it back to earth.
22 paź 2024 · The Echo 2 spacecraft was a 41-m balloon of aluminum foil-mylar laminate. Echo 2 was designed as a rigidized passive communications spacecraft for testing propagation, tracking, and communication techniques.
