Mathematics – Logic
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991rvgeo..29..249d&link_type=abstract
Reviews of Geophysics (ISSN 8755-1209), vol. 29, May 1991, p. 249-276.
Mathematics
Logic
62
Earthquakes, Geological Faults, Global Positioning System, Tectonics, Earth Crust, Geodynamics, Neutral Atmospheres, Remote Sensing, Signal Processing
Scientific paper
The fundamental principles of the global positioning system (GPS) are reviewed, with consideration given to geological and geophysical applications and related accuracy requirements. Recent improvements are emphasized which relate to areas such as equipment cost, limitations in the GPS satellite constellation, data analysis, uncertainties in satellite orbits and propagation delays, and problems in resolving carrier phase cycle ambiguities. Earthquake processes and near-fault crustal deformation monitoring have been facilitated by advances in GPS data acquisition and analysis. Horizontal positioning capability has been improved by new satellite constellation, better models, and global tracking networks. New classes of tectonic problems may now be studied through GPS, such as kinematic descriptions of crustal deformation and the measurement of relative plate motion at convergent boundaries. Continued improvements in the GPS are foreseen.
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