Global Positioning System (GPS) Basestation
The Environmental Data Center in University of Rhode Island's Department of Natural Resources Science provides Global Positioning System (GPS) Base Station reference files to the public, free of charge. The Continuously Operating Reference (CORS) station logs data from both L1 (C/A code) and L2 (carrier) frequencies at a 5 second interval, 24/7. The differential correction files are provided in several standard formats and direct downloading is available from within Pathfinder Office software.
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