HR: 08:30h
AN: G41A-03    [Abstracts]
TI: Low-latency high-rate GPS data from the EarthScope Plate Boundary Observatory
AU: * Anderson, G
EM: anderson@unavco.org
AF: UNAVCO, 6350 Nautilus Drive, Boulder, CO 80301, United States
AU: Jackson, M
EM: jackson@unavco.org
AF: UNAVCO, 6350 Nautilus Drive, Boulder, CO 80301, United States
AU: Meertens, C
EM: meertens@unavco.org
AF: UNAVCO, 6350 Nautilus Drive, Boulder, CO 80301, United States
AU: Stark, K
EM: stark@dukester.com
AF: Stark Consulting, LLC, 17339 Otsego Street, Encino, CA 91316, United States
AB: Real-time processing of high rate GPS data can give precise (e.g., 5-10 mm for data recorded once per second) recordings of rapid volcanic and seismic deformation. GPS is also an inertial sensor that records ground displacement with very high dynamic range, which allows the use of high rate GPS as a strong-motion seismometer. Such processing applied to low-latency streams of high sample rate GPS provide an emerging tool for earthquake, volcano, and tsunami geodesy and early warning. UNAVCO, as part of the EarthScope Plate Boundary Observatory project, is developing a system to provide such streams from some PBO and other UNAVCO-operated GPS stations, which we call UStream. UStream will be based on the Ntrip standard, a widely used protocol for streaming GNSS data over the Internet. Remote GPS stations will provide a stream of BINEX data at 1 sample/sec to an Ntrip server at UNAVCO's Boulder offices, while at the same time recording data locally in the event of communications failure. Once in Boulder, the data will be forked into three output streams: BINEX files stored at the UNAVCO archive and streams of data in BINEX and RTCM format. These data will flow to an Ntrip broadcaster that will distribute data to Ntrip clients, which can be anything from epoch-by-epoch processing systems to external data archiving systems. Data will flow through this system with no artificial latency and will be freely available to the community for use in scientific research.
UR: http:pboweb.unavco.org
DE: 0525 Data management
DE: 0594 Instruments and techniques
DE: 1207 Transient deformation (6924, 7230, 7240)
DE: 1222 Ocean monitoring with geodetic techniques (1225, 1641, 3010, 4532, 4556, 4560, 6959)
DE: 1241 Satellite geodesy: technical issues (6994, 7969)
SC: Geodesy [G]
MN: 2007 Joint Assembly