Measuring the Pasadena Base.
Measured at accuracy of at least 1 part in 5 million.
Measured accurately to help Albert Michelson determine velocity of light.
Base line party of Clement L. Garner
Image ID: theb1660, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Location: Pasadena, California
Photo Date: 1922
Credit: Association of Commissioned Officers
• High Resolution Photo Available
of the U.S. Department of Commerce, National Oceanic & Atmospheric
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April 30, 2013