Survey of Washington monument helps test GPS equipment
Article first published online: 3 JUN 2011
©1999. American Geophysical Union. All Rights Reserved.
Eos, Transactions American Geophysical Union
Volume 80, Issue 35, pages 393–394, 31 August 1999
How to Cite
1999), Survey of Washington monument helps test GPS equipment, Eos Trans. AGU, 80(35), 393–394, doi:10.1029/EO080i035p00393-02.(
- Issue published online: 3 JUN 2011
- Article first published online: 3 JUN 2011
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Although construction of the Washington Monument, an obelisk rising above the Washington, D.C. skyline, was completed in 1884, nobody knew exactly how tall it was until this past August.
Preliminary results of a new, three-dimensional positioning survey conducted in August, using the latest GPS (global positioning system) equipment, have added 7.6 cm to the landmark's height, making it 169.39 m tall. The U.S. National Park Service had maintained that the structure is 169.29 m tall, based on an earlier government survey conducted 65 years ago.