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How ground-based GPS stations help weather forecasters predict heavy rain and flooding

Geodesy is the study of Earth’s shape, gravity field and rotation.

An excellent method to study the Earth is by use of high-precision Continuous Global Positioning System (CGPS) stations that are firmly mounted on bedrock and can measure the slow, persistent ground motion of Earth’s crustal plates down to a few millimeters over time.

In the western United States, there are more than 1,200 CGPS stations, including more than 25 on the Central Coast. A few of these stations are classified as Global Positioning System Meteorology (GPS-Met), such as the ones located in Cambria, Los Osos and Point Sal.

Most of these stations are operated by UNAVCO (a nonprofit university-governed consortium), the

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