Tiffany Janzen

Légende

This blew my mind… your phones GPS finds you using time, not maps. When you open Google Maps, you might think satellites are sending down your location. But they don’t send maps at all. They send time signals… precise atomic-clock timestamps. So how does your phone turn those timestamps into your exact spot on Earth? Here is how it works.. your phone measures how long each satellite’s signal took to arrive. Since signals travel at the speed of light, even a delay of a few billionths of a second means you’re thousands of meters closer to one satellite than another. By turning those times into distances, your phone draws invisible spheres around each satellite. Where those spheres overlap… That’s your location. With at least four satellites, it locks in your latitude, longitude, and altitude with meter-level accuracy. And it only works because those satellites carry atomic clocks so precise they drift about a billionth of a second per day. Think about it: if the timing was off by just one microsecond, your GPS would be hundreds of meters wrong. #tech #stem #technology #futuretech #techexplained