330-PSA-286-60_(USN_710826)_(21464583995).jpg
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Summary
| Description | 330-PSA-286-60 (USN 710826): Heart of a Satellite. This small vacuum-protected heart of the Transit 3-A navigational satellite is an ultrastable crystal oscillator which pulses at a rate of several million beats a second. It’s being held here by J. Barry Oakes, the physicist of the Applied Physics Laboratory of the Johns Hopkins University, who developed it. The crystal’s sure, unchanging oscillations provide the signals on which Doppler measurements are made to enable Navy scientists to determine with precision the position of the satellite. Here, the oscillator or crystal is encased in a special three-cylinder high-vacuum flask. The flask bars nearly all temperature influence on the oscillator thus insuring a stable signal – vital if the Transit system is to operate. Photograph released November 11, 1960. (9/15/15). |
| Date | |
| Source | 330-PSA-286-60 (USN 710826) |
| Author | National Museum of the U.S. Navy |
Licensing
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This image was originally posted to Flickr by Photograph Curator at https://flickr.com/photos/127906254@N06/21464583995 ( archive ). It was reviewed on 10 July 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the Public Domain Mark. |
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This file is a work of a sailor or employee of the
U.S. Navy
, taken or made as part of that person's official duties. As a
work
of the
U.S. federal government
, it is in the
public domain
in the United States.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||