TY - GEN
T1 - Isolation of ionospheric events in GNSS phase scintillation observations in the Arctic
AU - Beeck, Sarah S.
AU - Olesen, Daniel H.
AU - Mitchell, Cathryn N.
N1 - Publisher Copyright:
© 2025 Proceedings of the International Technical Meeting of The Institute of Navigation, ITM. All rights reserved.
PY - 2025
Y1 - 2025
N2 - In the Arctic, space weather poses a threat to satellite-based navigation by inducing fluctuations in the phase of the radio signal, termed phase scintillation. Therefore, reliable space weather alerts and scintillation models are needed for better warnings and understanding of the impact. For real-time space weather alerts to be valuable, identifying and removing high scintillation values caused by other processes is crucial before issuing space weather alerts. Similarly, for a database of a scintillation model, a distinction between the origin of extreme phase scintillation values could increase the model's integrity. This can be a challenge for the phase scintillation index, σϕ, where other events, such as radio-interference, can result in high phase scintillation values that are not space weather related. In this paper, two methods for evaluating the origin of high σϕ values are examined and their use in combination is discussed. The findings show that for three of the station sites in Greenland, less than one percent of high σϕ values were not space-weather related. For the data collected in Kulusuk 46.85 percent of high σϕ were not space weather and 53.15 % were related to space weather. Therefore, isolating these allows for a significant reduction of misassigned σϕ, which can improve both GNSS-based modelling and alert systems.
AB - In the Arctic, space weather poses a threat to satellite-based navigation by inducing fluctuations in the phase of the radio signal, termed phase scintillation. Therefore, reliable space weather alerts and scintillation models are needed for better warnings and understanding of the impact. For real-time space weather alerts to be valuable, identifying and removing high scintillation values caused by other processes is crucial before issuing space weather alerts. Similarly, for a database of a scintillation model, a distinction between the origin of extreme phase scintillation values could increase the model's integrity. This can be a challenge for the phase scintillation index, σϕ, where other events, such as radio-interference, can result in high phase scintillation values that are not space weather related. In this paper, two methods for evaluating the origin of high σϕ values are examined and their use in combination is discussed. The findings show that for three of the station sites in Greenland, less than one percent of high σϕ values were not space-weather related. For the data collected in Kulusuk 46.85 percent of high σϕ were not space weather and 53.15 % were related to space weather. Therefore, isolating these allows for a significant reduction of misassigned σϕ, which can improve both GNSS-based modelling and alert systems.
U2 - 10.33012/2025.20008
DO - 10.33012/2025.20008
M3 - Article in proceedings
AN - SCOPUS:105001672244
T3 - International Technical Meeting (ITM) Proceedings
SP - 177
EP - 188
BT - Proceedings of the International Technical Meeting of The Institute of Navigation
PB - Institute of Navigation
T2 - International Technical Meeting of the Institute of Navigation 2025
Y2 - 27 January 2025 through 30 January 2025
ER -