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. 2018 Oct 29;18(11):3682. doi: 10.3390/s18113682

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Example of the GNSS (Global Navigation Satellite System) continuous recording stations DAM1 (reference) and DAM2 (CP) at Pacoima dam, USA (image credit: J.A Behr, 1998, https://pasadena.wr.usgs.gov/office/hudnut/SRL/figures/Figure_1.gif).