Larry Schenkat, Chief of Timing Section, with a portable quartz crystal clock.
It was used to check the mobile BC4 units' clocks.
Image ID: geod0029, NOAA's Geodesy Collection
Location: Maryland, Beltsville
Category: Geodesy/Satellite Triangulation/Stations/North America/
• High Resolution Photo Available
of the U.S. Department of Commerce, National Oceanic & Atmospheric
NOAA Central Library
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April 30, 2013