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CRTN: California Real Time Network   Overview Welcome to the Web Page of the California Real Time Network (CRTN). Please read the following links before using CRTN data and data products: Description | Access to Data | Funding | Disclaimer and Usage Guidelines | References | Presentations   Map - Current CRTN Status    (Updates automatically every 5 minutes)    Active RTGPS Stations -    Blue: up  Red: down  Planned Stations: Grey   Real Time Sub-Networks CRTN is a collaboration of efforts in Orange County, Riverside County (Metropolitan Water District), San Diego County, Imperial County, Los Angeles County (USGS Pasadena and others) and the Central California Valley. Click on the labels belows to zoom in on the different sub-networks, or view the entire network map. Southern California Caltrans Districts   Resources CRTN forum and community notices Projects providing telemetry support for real time networks include HPWREN and ROADNET For more information, contact Yehuda Bock