Journal
GEOPHYSICAL JOURNAL INTERNATIONAL
Volume 174, Issue 3, Pages 966-970Publisher
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-246X.2008.03842.x
Keywords
time series analysis; interferometry; volcano seismology; wave scattering and diffraction; volcano monitoring
Categories
Funding
- German Academic Exchange Service (Doctorandenstipendium)
- German Research Foundation (DFG)
- GFZ Potsdam
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The technique of retrieving Green's functions by pairwise correlation of a random wavefield is used to estimate the stability of the timing system of a seismic network. The method is demonstrated with data from a network consisting of stations with four independent clocks and GPS-receivers. For a two years period, daily measurements of the timing error of each of the four systems are obtained. These measurements can be used to correct the timing of the data in periods without GPS reception. The accuracy of this method can exceed the precision of the internal station clocks already after a single day of uncorrected drift.
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