キネマティックGNSS 時系列に含まれる微小信号の抽出

抄録

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.