Ongoing research from Oregon State University has created a Python tool to check Global Navigation Satellite System (GNSS) data quality, like GPS, for navigation. It detects errors from signal issues or space weather using RINEX files, without internet or extra files. Unlike complex, costly QC tools, it handles large networks like NOAA’s CORS Network. The tool identifies signal reflections, jumps, ionospheric issues, clock errors, and measurement uncertainties. Tested on a day with calm and stormy conditions, it flagged errors during a geomagnetic storm, proving effective. This scalable tool monitors GNSS data and reveals space weather impacts.