GPS Imaging of vertical land motion in California and Nevada: Implications for Sierra Nevada uplift.

ABSTRACT: We introduce Global Positioning System (GPS) Imaging, a new technique for robust estimation of the vertical velocity field of the Earth's surface, and apply it to the Sierra Nevada Mountain range in the western United States. Starting with vertical position time series from Global Positioning System (GPS) stations, we first estimate vertical velocities using the MIDAS robust trend estimator, which is insensitive to undocumented steps, outliers, seasonality, and heteroscedasticity. Using the Delaunay triangulation of station locations, we then apply a weighted median spatial filter to remove velocity outliers and enhance signals common to multiple stations. Finally, we interpolate the data using weighted median estimation on a grid. The resulting velocity field is temporally and spatially r

SUBMITTER: Hammond WC 

PROVIDER: S-EPMC5114868 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature