fj, Interesting paper from 2018 quantifying the impact of #solarflares on #GNSS systems.
The 🇨🇳 BeiDou system was outperforming 🇪🇺 Galileo and 🇺🇸GPS during solar flare conditions due to more frequently updated broadcast ionospheric models.
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018RS006591
I know Galileo/EGNOS did a recent system upgrade to provide increased resilience against solar peak activity, anticipating Solar Cycle 25, but not sure what those consisted of. Maybe @bert_hubert would know?
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