- Open Access
Interpolation of GPS results incorporating geophysical and InSAR information
Earth, Planets and Space volume 52, pages999–1002(2000)
Continuous GPS networks, typically with a station spacing of about 30 km, are still not dense enough to accurately characteristise the dynamics of active faults. Interpolation of these GPS results can improve our understanding of active faults and hence promote related studies. Moreover, even when the networks are densified in order to recover the signature of active faults, the station configuration design may not be ideal. Interpolation at these points, based on the GPS results from a well-designed station network, can provide a good quality control measure. As a first step in the interpolation process an irregular grid pattern is formed, based on the locations of the GPS stations, by using the indexed sorting algorithm. In order to interpolate objectively, the GPS stations and the intended interpolating points are classified into different sub-regions according to their positions in relation to the faults, which are expressed by open- and closed-curve models. GPS results from stations in the same sub-region are used to derive a dynamic model for interpolation at grid points in the same sub-region. A deformation distribution model based on GPS and differential Synthetic Aperture Radar Interferometry (InSAR) results is used as constraints to scale the time series generated using the dynamic model.
Bock, Y. and S. Williams, Integrated satellite interferometry in Southern California, EOS Trans., AGU, 78(29), 293, 1997.
Freymueller, J. T., N. E. King, and P. Segall, The co-seismic slip distribution of the Landers earthquake, Bull. Seis. Soc. America, 84(3), 646–659, 1994.
Ge, L., GPS seismometer and its signal extraction, Proc. 12th Int. Tech. Meeting of the Satellite Division of the U.S. Inst. of Navigation GPS ION’99, Nashville, Tennessee, 14–17 September, 1999.
Ge, L., S. Han, C. Rizos, Y. Ishikawa, M. Hoshiba, Y. Yoshida, M. Izawa, N. Hashimoto, and S. Himori, GPS seismometers with up to 20 Hz sampling rate, Pres. International Symposium on GPS—Application to Earth Sciences and Interaction with Other Space Geodetic Techniques (Tsukuba GPS 99), Tsukuba, Japan, 18–22 October, 1999.
Graham, L. C., Synthetic interferometer radar for topographic mapping, Proc. IEEE, 62, 763–768, 1974.
JPL, http://www.jpl.nasa.gov/missions/future/, 1999.
Massonnet, D., M. Rossi, C. Carmona, F. Adragna, G. Peltzer, K. Feigl, and T. Rabaute, The displacement field of the landers earthquake mapped by radar interferometry, Nature, 364(6433), 138–142, 1993.
Rizos, C., S. Han, L. Ge, H. Y. Chen, Y. Hatanaka, and K. Abe, Low-cost densification of permanent GPS networks for natural hazard mitigation: first tests on GSI’s GEONET network, Pres. Tsukuba GPS 99, Tsukuba, Japan, 18–22 October, 1999.
About this article
Cite this article
Ge, L., Han, S. & Rizos, C. Interpolation of GPS results incorporating geophysical and InSAR information. Earth Planet Sp 52, 999–1002 (2000). https://doi.org/10.1186/BF03352320
- Active Fault
- Interferometric Synthetic Aperture Radar
- Minimum Search
- InSAR Result
- CGPS Station