Sujet

Navigational Satellite, Transit 5-A, 1960s. Creator: Johns Hopkins University Applied Physics Laboratory.

Légende

Beginning in the 1960s, the United States Navy began developing a communications and navigation satellite program to meet the needs of ships at sea and submarines. One result of this program was the Transit satellite series, designed and built to Navy specifications by the Johns Hopkins University Applied Physics Laboratory in Maryland. Submarines received radio signals from a Transit satellite, whose orbit was known to great accuracy, as it passed overhead. The change in frequency of the signal due to the Doppler effect told the submarine that the satellite was directly overhead. The submarine commander could establish a position without having to surface and take reading on stars--the traditional method of navigation, but a risky one for a submarine. The Transit V-A satellite is an operational backup to the Transit series and was donated to NASM by the JHU Applied Physics Lab in late 1984.

Crédit

Photo12/Heritage Images/Heritage Art

Notre référence

HRM21A89_016

Model release

NA

Property release

NA

Licence

Droits gérés

Format disponible

23,3Mo (477,9Ko) / 32,9cm x 17,8cm / 3889 x 2097 (300dpi)

Mots clés

technology education country space satellite color location century navigation spacecraft navigational instrument space travel navigational device Sixties United States of America Colour Smithsonian Institution 1960s National Air and Space Museum Educational Institution 20th century air and space museum American America USA scientific institution object united states Heritage Art NASM SPACECRAFT-Unmanned-Test Vehicles Aluminum Paint Magnesium Copper Steel Adhesive Gold Plating Phenolic Resin Nylon Plastic Cadmium Plating Composite Synthetic Fabric Johns Hopkins University Applied Physics Laboratory Applied Physics Laboratory APL