How GPS works: how your phone knows where you are
Why GPS gets worse in the city, and the dot jumps around
In open country, your phone knows where you are to within a few metres. Between tall buildings, the blue dot jumps across the street, or walks you through a wall. The GPS satellites did not change. Something much closer did.
-
1
Miva took an earlier train, and she waits for you at a bus stop in the city. On the mountain, the dot was right to within a few metres. Here, it jumps to the other side of the street.
-
2
The satellites are the same ones as on the mountain, and they did not get worse. So what changed?
The rest of this episode is for subscribers
Subscribe to read every premium episode. You can cancel when you want.
Paid yearly: $99 instead of $119.88