That said, we're supposedly overdue for a field reversal, which may make the whole field go out on its own: https://en.wikipedia.org/wiki/Geomagnetic_reversal

That said, we're supposedly overdue for a field reversal, which may make the whole field go out on its own: https://en.wikipedia.org/wiki/Geomagnetic_reversal https://en.wikipedia.org/wiki/Geomagnetic_reversal So satellites or no, something might happen to it anyway.