In a paper published this week in Nature, Google researchers demonstrated they were able to use GPS signal measurements ...
China launched the final satellite in its BeiDou-3 satellite positioning system. Didn’t know that China had its own GPS? How about Europe’s Galileo, Russia’s GLONASS, or Japan’s QZSS?
The Global Positioning System (GPS) is the satellite array you’ll likely be most familiar with, as the US government’s system has become synonymous with tracking location for activity.