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GPS – Global Positioning System Space segment Control segment user segment 32 satellites World wide monitor and control stations
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GPS station
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Survey GPS Station
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Permanent GPS Station
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The Transmitted Signal Carrier waves PRN code (Satellite ID) Navigation message (TOT, satellite position and health)
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Data Processing Your location is: 37 o 23.323’ N 122 o 02.162’ W
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Data processing Absolute positioning Relative positioning Phase observable Estimation and elimination of measurement biases.
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Measurement Biases
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Time series and velocity field north east up
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WGS84 Reference Frame (World Geodetic System)
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ITRF datum (International Terrestrial Reference Frame)
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Translation and Rotation
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1-D elastic dislocation model Savage & Burford (1973) V(x) V0V0 D Peri & Wdowinski 2001 V 0 = 5 mm/yr
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Wdowinski et al. 2004 13 permanent GPS sites were measured from 1996 – 2002. Reference frame: Sinai subplate All 3.7 mm/y North 4.2 mm/yr South 2.9 mm/yr
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Measuring co-seismic deformation Insight into the 2004 Sumatra–Andaman earthquake from GPS measurements in southeast Asia C. Vigny et al. 2005
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Earth Quake modeling
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Post seismic deformation
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