Analysis of GPS positioning disturbing periodic radiation bursts in 24th solar cycle

The main objective of the present study is to perform  analysis of the space weather impact in the cases of each day periodic occurrence in various seasons in selected monthly nights at the GPS positioning results of Latvian CORS (Continuously Operating Reference Stations) in time span 2007 to 2017. The analysis performed of the GPS (Global Positioning System) 90-second kinematic post-processing solutions, obtained using Bernese GNSS Software v5.2. To complete this study, the time series of daily outliers are analyzed for all the Latvian CORS that occurs simultaneously in two or more CORS stations. Over 36 million position determination solutions were examined. Daily regular ionospheric scintillation phenomena with duration around 4-7 minutes were observed in solar activity years daily, starting from March till December. The research articles were searched where similar scintillation events have been analyzed. The articles on Pc1 scintillation waves were found where similar phenomena has been described. The results of statistical analysis of the occurrence events will be presented, focusing especially on the periodic ionospheric scintillations observed in the region of Latvia, with a latitude around 57º N.