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File:330-ps-8339-usn-709832 16402933902 o.jpg

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English: 330-PS-8339 (USN 709832): One of the engineers at the U.S. Naval Research Laboratory, Washington, D.C., holds in his hand a small mini-track transmitter and the battery pack which will be used in the scientific Earth satellite. The tiny transmitter, operating on a frequency of 108 megacycles, has a range of over 4,000 miles. The project is being sponsored by the National Academy of Sciences and the National Science Foundation as part of the U.S. Program for participation in the International Geophysical Year. Photograph released April 25, 1957. (1/29/2015).
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Source National Museum of the U.S. Navy
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This image is a work of a U.S. military or Department of Defense employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain in the United States.

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current19:43, 9 July 2018Thumbnail for version as of 19:43, 9 July 20182,172 × 2,756 (508 KB)Tyler de Noche (talk | contribs)

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