Agencies Operating Continuous (Permanent) GNSS Sites

Many agencies operate continuous GNSS sites for which we display the results of positioning and time series analysis on our website or that we use for reference frame adjustments. The agency information is compiled from site logs, RINEX headers, and metadata that are provided on individual networks’ web pages.

Agencies Operating Campaign (Temporary) GNSS Sites

The majority of campaign GNSS site positions displayed on our website were obtained from data collected by the USGS Earthquake Hazards and Volcano Hazards Programs. In some cases we include data collected by other agencies for benchmarks that we also survey and data resulting from collaborations between USGS and other groups. We compile this information from RINEX headers and site logs.