February 16, 2005

San Diego County Real-Time Very High Rate High-Precision GPS Network Interfaces via HPWREN

The HPWREN communications backbone is being utilized to develop the San Diego County Real-Time GPS Network (SDCRTN), a collaboration of UCSD/SIO and San Diego County's Department of Public Works and Sheriff's Department. The network, consisting of 22 high-precision GPS stations, originally designed for long-term crustal motion monitoring, is being upgraded to real-time operations to be useful for San Diego County decision makers in the areas of infrastructure monitoring, surveying and GIS, hazards management, emergency response, and crime scene investigations.

The installation of a real-time station at the Ramona Airport was finished on February 3, 2005.
GPS site in Ramona

The first station to use HPWREN is the SCIGN (Southern California Integrated GPS Network) station at Palomar Observatory. It was upgraded to 1 Hz streaming in July 2004. On February 3, 2005, the second station began streaming data from a site at the Ramona Airport. This station is first of four stations constructed and funded by the County specifically for SDCRTN. These four stations are unique in that they are the first high-precision GPS stations that can sample at very high rates (up to 20 Hz), suitable for supporting real-time dynamic applications. This is made possible by the 45 Mbps HPWREN backbone.

PBO data flow Data flow for a Plate Boundary Observatory prototype in San Diego County. The data generated at the sensors flows via HPWREN and other networks to the central PBO site in Boulder, Colorado.

The network will also include an upgrade of 11 new stations of EarthScope's Plate Boundary Observatory (PBO), and two stations (Camp Elliot and NASA's Monument Peak facility) that will provide a collocation of modern GPS and broadband instruments. The network will also utilize the communications backbone operated by the Sheriff's Department.

Click here for a 9 megabyte PDF copy of a recent presentation at the CSRC Real-Time Symposium.

-- Yehuda Bock, Research Geodesist, Director, Scripps Orbit and Permanent Array Center (SOPAC) and Director, California Spatial Reference Center (CSRC), Institute of Geophysics and Planetary Physics UCSD

(This is an update to http://hpwren.ucsd.edu/news/040402.html)

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