Without GPS, we’d be lost. Literally. Thanks to these radio transmissions from space though, we’re able to pinpoint our location and find our way home. Join us as we learn all about satellites, how the robot voice of GPS is created and how atomic clocks hold it all together.

Right-click here for an episode transcript.

And check out this video of a GPS satellite being launched into space:

And this excellent video will tell you more about atomic clocks and timekeeper Dr. Demetrios Matsakis:

This episode originally aired April 27th, 2015. Listen to the original here!

How does GPS know where you are?
by MPR