Real-time coseismic velocity and displacements retrieving and de-noising process by high-rate GNSS

Abstract

High-rate GNSS is commonly used in seismology, as the impacts of orbit error, clock error, atmosphere error and multipath effect, the coseismic velocity and displacement which are estimated by the broadcast ephemeris usually exists drifts, and serious distort by the pollution of high-rate noise. This paper proposes a new method with the low pass filter and linear correction are used to de-trending low frequency drifts and de-noising high frequency noise by S transform, then the coseismic velocity and displacement are real-time recovered. The validations show that, the recovered velocity is very consistent with the waveforms recorded by strong-motion, the precision of coseismic displacement is better than 2 and 5 cm in horizontal and vertical respectively, the inversion results which gained by real time recovered displacements is closed to the post processed results. © 2013 Springer-Verlag Berlin Heidelberg.