The most intense space weather event of the past two decades hit GPS satellites' orbit just after a solar minimum.
displays but also induce electric currents that can, in the case of the most severe storms, knock out power grids and disrupt telecommunication networks.
"That's one reason why it's difficult to attribute [spacecraft] anomalies sometimes," said Meredith."The charge can build up, and it can get to the point where it's nearly about to break down but doesn't actually break down. And then, a little bit later, a small event could come along and cause a discharge, although of course the majority of that charge would have come from the extreme event.
"The GPS constellation is nominally designed and operated with six orbital planes, with a minimum of four satellites per plane," Dillon wrote."The 24-slot arrangement ensures users can view at least four satellites from virtually any point on the planet, but the Space Force flies 37 satellites to maintain coverage for whenever a baseline satellite becomes unserviceable."
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