These files are provided free of charge by The GIS Training and Research Center at Idaho State University, Pocatello, Idaho. The GPS receiver is a 12-channel Trimble ProXR with a phase corrected antenna. Our software from August 1999- August 2005 was Pathfinder Community Base Station software ver. 2.60 (PFCBS). We upgraded our software to Trimble Reference Station late in August 2005. You can use these files to differentially correct GPS locations using standard post-processing software. Expected horizontal positional accuracy is +/-0.5 m (@ 95% CI) assuming you are using a 12-channel receiver with appropriate PDOP and elevation masks applied and are using averaging in the field. To obtain optimal accuracy you should collect data relatively close to this base station (Pocatello, Idaho).

View the reference location accuracy statement and other technical information.

In addition to the GIS Center's Community Base Station, the ISU College of Technology has developed a CORS station serving the Pocatello valley. To access real-time differential correction locally, just "tune-in" to 461.025 mHz and set your receiver for CMR or CMR+.

At University Place in Idaho Falls, users can access real-time differential correction locally by "tuning into" 464.50 mHz (set your receiver for CMR or CMR+).

Blackfoot users can access real-time differential correction by similarly "tuning-into" to 461.025 mHz.