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- Project_Echo abstract "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 them from one point on Earth to another.".
- Project_Echo thumbnail Echo-1.jpg?width=300.
- Project_Echo wikiPageID "948738".
- Project_Echo wikiPageRevisionID "642769447".
- Project_Echo apoapsis "1029.0".
- Project_Echo apoapsis "1524.0".
- Project_Echo batteries Nickel%E2%80%93cadmium_battery.
- Project_Echo caption "Echo 1 sits fully inflated at a Navy hangar in Weeksville, North Carolina".
- Project_Echo caption "Echo 2 undergoing tensile stress test in a dirigible hangar at Weeksville, North Carolina".
- Project_Echo decay "1968-05-24".
- Project_Echo decay "1969-06-07".
- Project_Echo description ""Big Bounce, The"".
- Project_Echo description ""Space Triumph. Discoverer Capsule Recovered From Orbit , 1960/08/15 "".
- Project_Echo dimensions "1828.8".
- Project_Echo dimensions "2460.0".
- Project_Echo eccentricity "0.01002".
- Project_Echo eccentricity "0.01899".
- Project_Echo hasPhotoCollection Project_Echo.
- Project_Echo id "1958-12-22".
- Project_Echo id "1960-08-15".
- Project_Echo launchDate "34783.0".
- Project_Echo launchDate "50344.0".
- Project_Echo launchSite Cape_Canaveral_Air_Force_Station.
- Project_Echo launchSite Cape_Canaveral_Air_Force_Station_Space_Launch_Complex_17.
- Project_Echo launchSite Vandenberg_Air_Force_Base.
- Project_Echo launchVehicle Thor-Delta.
- Project_Echo launchVehicle Thor-Agena_B.
- Project_Echo mass "66.0".
- Project_Echo name "Echo 1A".
- Project_Echo name "Echo 2".
- Project_Echo nssdcId "1960".
- Project_Echo nssdcId "1964".
- Project_Echo orbitInclination "47.2".
- Project_Echo orbitInclination "81.5".
- Project_Echo orbitalPeriod "6537.0".
- Project_Echo orbitalPeriod "7098.0".
- Project_Echo organization Bell_Labs.
- Project_Echo periapsis "1316.0".
- Project_Echo periapsis "1684.0".
- Project_Echo power "70".
- Project_Echo power "solar cells".
- Project_Echo satcat "49".
- Project_Echo subject Category:1960_in_spaceflight.
- Project_Echo subject Category:1964_in_spaceflight.
- Project_Echo subject Category:Articles_containing_video_clips.
- Project_Echo subject Category:Communications_satellites_in_low_Earth_orbit.
- Project_Echo subject Category:Passive_satellites.
- Project_Echo subject Category:Spacecraft_launched_in_1960.
- Project_Echo subject Category:Spacecraft_launched_in_1964.
- Project_Echo type Artifact100021939.
- Project_Echo type CommunicationsSatellite103077741.
- Project_Echo type CommunicationsSatellitesInLowEarthOrbit.
- Project_Echo type Equipment103294048.
- Project_Echo type Instrumentality103575240.
- Project_Echo type Object100002684.
- Project_Echo type PhysicalEntity100001930.
- Project_Echo type Satellite104137444.
- Project_Echo type Whole100003553.
- Project_Echo type MeanOfTransportation.
- Project_Echo type Spacecraft.
- Project_Echo type DesignedArtifact.
- Project_Echo type Thing.
- Project_Echo type Q40218.
- Project_Echo comment "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 them from one point on Earth to another.".
- Project_Echo label "ECHO".
- Project_Echo label "Echo (satelit)".
- Project_Echo label "Echo (satellite)".
- Project_Echo label "Echo (satélite)".
- Project_Echo label "Project Echo".
- Project_Echo label "Эхо (программа)".
- Project_Echo label "エコー (人工衛星)".
- Project_Echo sameAs Δορυφόροι_Έκο.
- Project_Echo sameAs Echo_(satélite).
- Project_Echo sameAs Echo_(satellite).
- Project_Echo sameAs Echo_(satelit).
- Project_Echo sameAs エコー_(人工衛星).
- Project_Echo sameAs ECHO.
- Project_Echo sameAs m.03sk44.
- Project_Echo sameAs Q620661.
- Project_Echo sameAs Q620661.
- Project_Echo sameAs Project_Echo.
- Project_Echo wasDerivedFrom Project_Echo?oldid=642769447.
- Project_Echo depiction Echo-1.jpg.
- Project_Echo isPrimaryTopicOf Project_Echo.
- Project_Echo name "Echo 1A".
- Project_Echo name "Echo 2".