Signal Extraction from Kinematic GNSS Time Series

Abstract

Three techniques for extracting small signals from kinematic GNSS time series are reviewed. The first is the empirical orthogonal function, which the author used to extract coseismic/postseismic displacements observed immediately after the 2011 off the Pacific coast earthquake. The second is the time-dependent inversion of a time-variable scaling factor, which the author used to evaluate thermal deformations of the GNSS monuments using tilt-meters and kinematic GNSS time series. The third is the stacking method, which the author used to extract displacements associated with tilt-change/very long period seismic signal ( TC/VLP) events observed during the earlystage of 2000 Miyake-jima volcanic crisis. Furthermore, a prototype system for estimating kinematic GNSS time series of Japanese GEONET stations to make kinematic GNSS time series easily accessible is summarized.