STL7 (IL)

NOAA NGS_CORS reference station STL7 in Saint Clair County, US, tracks GPS and GLONASS constellations to provide dual-frequency GNSS observations. Surveyors can utilize this station for real-time kinematic (RTK) corrections, static post-processing, and network solutions to achieve centimeter-level positioning accuracy. Data archived at NGS serves as a geodetic control point for survey networks and