HR: 1340h
AN: G13B-1231    [Abstracts]
TI: GPS data exploration for seismologists and geodesists
AU: * webb, f
EM: fhw@jpl.nasa.gov
AF: Jet Propulsion Laboratory, 4800 Oak Grove Dr 238-600, Pasadena, CA 91109, United States
AU: Bock, Y
EM: ybock@ucsd.edu
AF: Scripps Orbit and Permanent Array Center, Institute of Geophysics and Planetary Physics 9500 Gilman Drive DEPT 0225, La Jolla, ca 92093, United States
AU: Kedar, S
AF: Jet Propulsion Laboratory, 4800 Oak Grove Dr 238-600, Pasadena, CA 91109, United States
AU: Dong, D
AF: Jet Propulsion Laboratory, 4800 Oak Grove Dr 238-600, Pasadena, CA 91109, United States
AU: Jamason, P
AF: Scripps Orbit and Permanent Array Center, Institute of Geophysics and Planetary Physics 9500 Gilman Drive DEPT 0225, La Jolla, ca 92093, United States
AU: Chang, R
AF: Scripps Orbit and Permanent Array Center, Institute of Geophysics and Planetary Physics 9500 Gilman Drive DEPT 0225, La Jolla, ca 92093, United States
AU: Prawirodirdjo, L
AF: Scripps Orbit and Permanent Array Center, Institute of Geophysics and Planetary Physics 9500 Gilman Drive DEPT 0225, La Jolla, ca 92093, United States
AU: MacLeod, I
AF: Scripps Orbit and Permanent Array Center, Institute of Geophysics and Planetary Physics 9500 Gilman Drive DEPT 0225, La Jolla, ca 92093, United States
AU: Wadsworth, G
AF: Scripps Orbit and Permanent Array Center, Institute of Geophysics and Planetary Physics 9500 Gilman Drive DEPT 0225, La Jolla, ca 92093, United States
AB: Over the past decade, GPS and seismic networks spanning the western US plate boundaries have produced vast amounts of data that need to be made accessible to both the geodesy and seismology communities. Unlike seismic data, raw geodetic data requires significant processing before geophysical interpretations can be made. This requires the generation of data-products (time series, velocities and strain maps) and dissemination strategies to bridge these differences and assure efficient use of data across traditionally separate communities. "GPS DATA PRODUCTS FOR SOLID EARTH SCIENCE" (GDPSES) is a multi-year NASA funded project, designed to produce and deliver high quality GPS time series, velocities, and strain fields, derived from multiple GPS networks along the western US plate boundary, and to make these products easily accessible to geophysicists. Our GPS product dissemination is through modern web-based IT methodology. Product browsing is facilitated through a web tool known as GPS Explorer and continuous streams of GPS time series are provided using web services to the seismic archive, where it can be accessed by seismologists using traditional seismic data viewing and manipulation tools. GPS-Explorer enables users to efficiently browse several layers of data products from raw data through time series, velocities and strain by providing the user with a web interface, which seamlessly interacts with a continuously updated database of these data products through the use of web-services. The current archive contains GDPSES data products beginning in 1995, and includes observations from GPS stations in EarthScope's Plate Boundary Observatory (PBO), as well as from real-time real-time CGPS stations. The generic, standards-based approach used in this project enables GDPSES to seamlessly expand indefinitely to include other space-time-dependent data products from additional GPS networks. The prototype GPS-Explorer provides users with a personalized working environment in which the user may zoom in and access subsets of the data via web services. It provides users with a variety of interactive web tools interconnected in a portlet environment to explore and save datasets of interest to return to at a later date. At the same time the GPS time series are also made available through the seismic data archive, where the GPS networks are treated as regular seismic networks, whose data is made available in data formats used by seismic utilities such as SEED readers and SAC. A key challenge, stemming from the fundamental differences between seismic and geodetic time series, is the representation of reprocessed of GPS data in the seismic archive. As GPS processing algorithms evolve and their accuracy increases, a periodic complete recreation of the the GPS time series archive is necessary.
DE: 1295 Integrations of techniques
DE: 1299 General or miscellaneous (1709)
DE: 7299 General or miscellaneous
SC: Geodesy [G]
MN: 2007 Fall Meeting