GPS-controlled tide gauges in Indonesia – a German contribution to Indonesia's Tsunami Early Warning System

Abstract. Coastal tide gauges do not only play a central role in the study of climate-related sea level changes but also in tsunami warning systems. Over the past five years, ten GPS-controlled tide gauge systems have been installed by the German Research Centre for Geosciences (GFZ) in Indonesia to assist the development of the Indonesian Tsunami Early Warning System (InaTEWS). These stations are mainly installed at the Indonesian coastline facing the Indian Ocean. The tide gauge systems deliver information about the instantaneous sea level, vertical control information through GPS, and meteorological observations. A tidal analysis at the station's computer allows the detection of rapid changes in the local sea level ("sea level events"/SLE), thus indicating, for example, the arrival time of tsunamis. The technical implementation, communication issues, the operation and the sea level event detection algorithm, and some results from recent earthquakes and tsunamis are described in this paper.

[1]  Chris Rizos,et al.  The International GNSS Service in a changing landscape of Global Navigation Satellite Systems , 2009 .

[2]  Stefano Tinti,et al.  Preface "The GITEWS Project (German-Indonesian Tsunami Early Warning System)" , 2009 .

[3]  Jörn Behrens,et al.  A new multi-sensor approach to simulation assisted tsunami early warning , 2010 .

[4]  M. Bouin,et al.  Geocentric sea-level trend estimates from GPS analyses at relevant tide gauges world-wide , 2007 .

[5]  S. Kathiroli,et al.  Rupture process of the 2004 great Sumatra-Andaman earthquake estimated from tsunami waveforms , 2005 .

[6]  Thomas A. Herring,et al.  MATLAB Tools for viewing GPS velocities and time series , 2003 .

[7]  L. Mervart,et al.  Bernese GPS Software Version 5.0 , 2007 .

[8]  Peter Steigenberger,et al.  Reprocessing of a global GPS network , 2006 .

[9]  Z. Altamimi,et al.  ITRF2005 : A new release of the International Terrestrial Reference Frame based on time series of station positions and Earth Orientation Parameters , 2007 .

[10]  Andreas Hoechner,et al.  Source modeling and inversion with near real-time GPS: a GITEWS perspective for Indonesia , 2010 .

[11]  G. Mitchum,et al.  The global sea level observing system (GLOSS) , 2010 .

[12]  Joachim Wächter,et al.  An integration platform for heterogeneous sensor systems in GITEWS – Tsunami Service Bus , 2010 .

[13]  P. R. Foden,et al.  Real time sea level data transmission from tide gauges for tsunami monitoring and long term sea level rise observations , 2008 .

[14]  Tilo Schöne,et al.  IGS Tide Gauge Benchmark Monitoring Pilot Project (TIGA): scientific benefits , 2009 .

[15]  M. Foreman.  MANUAL FOR TIDAL HEIGHTS ANALYSIS AND PREDICTION , 2000 .

[16]  H. Schuh,et al.  Troposphere mapping functions for GPS and very long baseline interferometry from European Centre for Medium‐Range Weather Forecasts operational analysis data , 2006 .

[17]  J. Lauterjung,et al.  The challenge of installing a tsunami early warning system in the vicinity of the Sunda Arc, Indonesia , 2010 .