Global Positioning System (GPS) geodesy is a well-known tool to measure the long-term surface deformation of the Earth at various temporal and spatial scales, and it is widely used in studies of geodynamics. GPS dual-frequency geodetic-quality receivers are typically sampled at rates of 15 to 30 s and analyzed in a batch mode over intervals from one hour to 24 hours. Recently, 1-Hz or greater rate sampled continuous GPS has been recognized as useful in combination with seismometers to capture the long-period seismic waves from large earthquakes and to detect volcano inflation and tsunamigenic landsliding (Bock et al. 2000...

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