If global navigation satellite systems (GNSS) stopped working, life would get confusing pretty quickly, since we use them for everything from driving directions to keeping computer clocks updated. Even a 13-microsecond satellite clock error in 2016 ended up causing a lot of headaches until it was fixed. Thus, it’s probably a good thing that GPS isn’t the only satellite navigation system in existence – Russia, the EU, and China all have their own satellite constellations, and there are even smaller regional systems that help make coverage of certain areas more precise. In fact, your phone is probably counting on two or three different satellite constellations… Read more