• Organization: Department of the Interior
• Updated: 2020-08-12T00:00:00Z

Data collection: GPS measurements were taken at 24 geodetic monuments during September 27-October 2, 2015. The GPS surveys generally followed established guidelines (Zilkoski and others, 1997),...

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• Organization: National Institute of Standards and Technology
• Updated: 2014-01-01 00:00:00

This site, developed in the Physics Laboratory at NIST, addresses three topics: fundamental physical constants, the International System of Units (SI), which is the modern metric system, and...

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