CRTN Description
The California Real Time Network (CRTN) is a UC San Diego research program started in 2001, with a significant education and outreach component linked to the California Spatial Reference Center (CSRC). The primary purpose of CRTN is research on early warning systems for natural hazards using precise real-time GPS technology. It is led by Scripps Orbit and Permanent Array Center (SOPAC) Director and Principal Investigator Yehuda Bock at the Cecil H. and Ida M. Green Institute of Geophysics and Planetary Physics (IGPP) at Scripps Institution of Oceanography (SIO). SOPAC and its partners upgrade science-based continuous GPS stations in California to real time (less than 1 s latency) high rate (1 Hz) operations, and retrieve, disseminate, analyze and archive the data and data products. Maintenance of the real-time system in Southern California is performed by SOPAC, with the assistance of Southern California Metropolitan Water District, San Diego's Department of Public Works and Sheriff's Department, Orange County Public Works, UCSD's HPWREN project, and Geodetics, Inc. Data are also accessed from Earthscope's Plate Boundary Observatory at UNAVCO (PBO), U.S. Geological Survey in Pasadena (USGS), and the Bay Area Regional Deformation Array (BARD) at the Berkeley Seismological Laboratory.

CRTN real-time data streams are available for a variety of real-time applications through NTRIP protocol , as well as archived 1 Hz rinex data files.