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
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.