The Movement of GPS Positioning Discrepancy Clouds at a Mid-Latitude Region in March 2015

The geomagnetic storm on 17 March 2015 had a strong impact the global navigation satellite systems (GNSS) positioning results in many GNSS Continuously Operating Reference Stations (CORS) Europe. analysis of system (GPS) observations Latvian CORS stations discovered this space weather event over whole country. appeared as moving cloud discrepancies across However, days before revealed other smaller duration ionospheric scintillation events. objective was to analyze GPS discrepancy movement, total electron content (TEC), and rate change TEC index (ROTI) relationships, well statistics. area 16–18 increased by including EGNOS ground-based Ranging Integrity Monitoring (RIMS): GVLA GVLB, LAPA LAPB, WRSA WRSB. conclusion study is that each “shot” after 90 s gives completely new with impacted station subset, its configuration, irregular values.