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~1m range errors in the pseudorange from just the satellites which are on the other side of this hole, is a relatively small error, and certainly within or close to normal ionosphere and troposphere fluctuation impact on GNSS performance.

This would not be noticeable at all on a standard GNSS like the one in your phone.

Survey receivers use (at least) two frequencies which allows a simple calculation to determine pretty much exactly the delay due to the ionosphere, so they aren't affected by this at all.

This is an interesting anomaly, but GNSS is built to cope with this under normal usage, so it's inconsequential as far as I can tell.

If anyone has time and wants to see for yourself, 'CORS' - continuously operating reference stations, are available all over the place around where this happened, and the raw receiver data is freely available. You can download it and because you know the exact position of each receiver, you will be able to see the exact impact of this event at which ever location you would like to analyze.

Various open source tools are out there to process the data such as gLab and RTKLIB.

If anyone has the time to give it a crack and needs a hand or guidance feel free to ping me here.



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