Copyright 2019 Hubbard Radio Washington DC, LLC. All rights reserved. This website is not intended for users located within the European Economic Area.
The satellite was launched from Cape Canaveral Air Force Station, Florida on March 26, 1958, by the Juno I vehicle. Explorer 3 was placed in an orbit with a perigee of 186 kilometers and an apogee of 2799 kilometers having a period of 115.7 minutes. Its total weight was 14.1 kilograms, of which 8.4 kg was instrumentation. The instrument section at the front end of the satellite and the empty scaled-down fourth-stage rocket casing orbited as a single unit, spinning around its long axis at 750 revolutions per minute. The discovery of the Van Allen radiation belt by the Explorer satellites is considered to be one of the most outstanding discoveries.
Copyright © 2019 Federal News Network. All rights reserved. This website is not intended for users located within the European Economic Area.