The continuously Operating Reference Station (CORS) network coordinated by the National Geodetic Survey, NOAA, is a group of GPS reference stations which provide code range and carrier phase data to users in support of postprocessing applications.
The GPS data is being recorded at a 30 second sampling rate in the RINEX 2 format, version 2(1). The data sets are available for 31 days and can be retried over the Internet. After that period, the data are archived on CD ROM and is available by special request.
Currently, the CORS network consists of just under 100 sites, including the 51 U.S. Coast Guard DGPS sites, plus sites operated by the U.S. Army Corps of Engineers, NOAA and other organizations.
This data is available on the Internet from the CORS Web Site. Current network coverage can be found on the CORS Coverage Map. Utilization of this data requires downloading the compressed RINEX data files, renaming and decompressing the files, and performing postprocessing with Trimble's Pathfinder Office or other differential correction software.
Trimble Pathfinder Community Base Station receivers log base data in Trimble's .SSF format, suitable for performing differential corrections utilizing Trimble's Pathfinder Office or older PFINDER software.
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