High-Rate GNSS Techniques for the Detection of Large Seismic Displacements

Detection of the seismic strong motion is of great importancefor earthquake studies. We have investigated the usageof high-rate sampled Global Navigation Satellite System(GNSS) data to measure seismic motion by implementingan industrial robot simulating the displacements close to anearthquake. The motion of the robot is tracked by GlobalPositioning System (GPS) signals. Two baselines-400 m and60 km-from the robot to reference stations are used to processthe observed GPS data. Both methods give similar (within0.5 mm) Root Mean Square (RMS) differences between theestimated and the commanded coordinates. The RMS differencesare approximately 3.5 mm in the east component, 5 mmin the north component, and 7 mm in the vertical component

High-Rate GNSS Techniques for the Detection of Large Seismic Displacements

Detection of the seismic strong motion is of great importancefor earthquake studies. We have investigated the usageof high-rate sampled Global Navigation Satellite System(GNSS) data to measure seismic motion by implementingan industrial robot simulating the displacements close to anearthquake. The motion of the robot is tracked by GlobalPositioning System (GPS) signals. Two baselines-400 m and60 km-from the robot to reference stations are used to processthe observed GPS data. Both methods give similar (within0.5 mm) Root Mean Square (RMS) differences between theestimated and the commanded coordinates. The RMS differencesare approximately 3.5 mm in the east component, 5 mmin the north component, and 7 mm in the vertical component