STL5 (IL)

STL5 is a permanent GNSS CORS reference station operated by NOAA NGS in Saint Clair County, US, tracking GPS and GLONASS constellations. Surveyors can utilize this station for real-time kinematic (RTK) corrections, static post-processing, and network adjustments to achieve high-accuracy positioning in the region. The multi-constellation capability enhances geometric strength and availability, part