Collar, Satellite, LOFTI 1, Engineering Model


Display Status:

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.

Collection Item Summary:

This is the connecting collar for the antenna for the first of a series of LOw Frequency Trans-Ionospheric (LOFTI) radio satellites. LOFTI satellites were one of the first satellites intended to study the propagation of low frequency radio waves through and in the ionosphere as well as through water, to penetrate reliably enough to be used for communications with submerged submarines. LOFTI-1 was launched on a Thor-Able rocket in 1961. The scheduled separation from the Transit-3B satellite to which it was attached failed. Much valuable data on VLF and VHF transionospheric transmission was obtained in spite of the satellite's resulting shortened time in orbit.

The U.S. Naval Research Laboratory transferred this object to the Museum in 1975.

Collection Item Long Description:

Inventory Number


Credit Line

Transferred from the Naval Research Laboratory

Country of Origin

United States of America


Aluminum, steel, resin laminate


  • 29.85 x 23.5 x 1.91cm (11 3/4in. x 9 1/4in. x 3/4in.) (Approximate, aluminum ring)
  • 23.5 x 1.91cm (9 1/4in. x 3/4in.) (Approximate, laminate ring)

Data Source

National Air and Space Museum

Restrictions & Rights

Do not reproduce without permission from the Smithsonian Institution, National Air and Space Museum


SPACECRAFT-Unmanned-Parts & Structural Components

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