Assessment of Ionospheric Scintillations from Equatorial GNSS Stations for GBAS Applications

Kurzfassung

Ionospheric scintillation indices from two different GNSS receivers that are closely spaced over Tenerife, Spain from DLR: 28.48° N, 16.32° W and SINTEF: 28.485° N, 16.352° W were assessed to identify potential threats for the Ground Based Augmentation System (GBAS) applications. Statistical analysis for the data period over the ascending phase of solar cycle 25 from 2019-2023 is carefully addressed from the two receivers. We applied an anomaly detection to avoid multipath effects through the minimum elevation cut-off. Classification of amplitude scintillation index and phase scintillation index based on International Civil Aviation Organization (ICAO) guidelines is performed to distinguish the low, moderate and high scintillation events over the geographic location. The datasets are examined for quiet and disturbed space weather conditions. The impact of scintillation on availability of satellites is clearly understood from the two GNSS receivers. Critically inspected the loss-of-lock condition from both receivers to understand tracking failure during high scintillation activity.