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USGS GPS Data

Acknowledge the NCEDC

Cite the NCEDC:

"NCEDC (2014), Northern California Earthquake Data Center. UC Berkeley Seismological Laboratory. Dataset. doi:10.7932/NCEDC."

Acknowledge the NCEDC:

"Waveform data, metadata, or data products for this study were accessed through the Northern California Earthquake Data Center (NCEDC), doi:10.7932/NCEDC."

Please use these statements in your publication acknowledgments.

Real-time GPS Data

The U.S. Geological Survey (USGS) Earthquake Science Center operates a network of eight real-time GPS stations in the San Francisco Bay area. Each station transmits 1-Hz data to a processing center located on the USGS main campus in Menlo Park. A suite of web-based applications monitor on a continuous basis the networkĘs operational status , data streaming performance and deformation within the network. For this and more information please visit http://escweb.wr.usgs.gov/share/highrate-gps/

Data Access
Receiver data, both raw and RINEX 24-hour files, and site information are available from the Northern California Earthquake Data Center using FTP. The raw and RINEX data files are in day-of-year directories. See hints for using FTP to retrieve data in compressed or uncompressed format.

Survey-Mode GPS Data

An effort is underway to catalog and distribute survey-mode GPS data collected in the western United States, primarily in northern California. This includes a dataset of over 6000 occupations collected in 1992-present by the USGS/Menlo Park in California, Oregon, Washington, Nevada, Utah, Idaho, and Alaska. Currently, we have made approximately 98% of these data files available, after verifying the consistency of the raw, RINEX, and scanned log sheets, defining monument identifiers that are unique within the NCEDC system, and creating data holding records describing the files for use in the GPS Seamless Archive Centers (GSAC) project. Similar efforts are planned for other high-precision GPS datasets that have been collected by NGS, Caltrans, and other university, government, and commercial agencies.

Station Information

Data Access
Receiver data, both raw and RINEX 24-hour files, and site information are available from the Northern California Earthquake Data Center using FTP. The raw and RINEX data files are in day-of-year directories. See hints for using FTP to retrieve data in compressed or uncompressed format.