In a "hot" situation, the ground segment is, well, "vulnerable" doesn't quite cut it. EU power projection isn't vaguely close to enough to protect all those far-flung islands that make the system work.
But there are "cold" scenarios where bombing ground stations wouldn't be kosher but denying GNSS services might be. That's what Galileo insures against. I don't think those scenarios are particularly likely, so it's awful pricey insurance, but it's also a very important capability so opinions may differ.
But there are "cold" scenarios where bombing ground stations wouldn't be kosher but denying GNSS services might be. That's what Galileo insures against. I don't think those scenarios are particularly likely, so it's awful pricey insurance, but it's also a very important capability so opinions may differ.