Enjoying EarthSky? Subscribe.

274,302 subscribers and counting ...

Why your GPS twinkles

Radio signals twinkle much as stars do. This can have an effect on your GPS.

Bottom line: Dynamic bubbles of ionization in Earth’s upper atmosphere can cause GPS signals to “twinkle” like stars, affecting the quality of navigation on Earth below. New video from NASA.

Enjoying EarthSky? Sign up for our free daily newsletter today!

Eleanor Imster

MORE ARTICLES

EarthSky Newsletter

Nearly half a million daily subscribers love our newsletter. What are you waiting for? Sign up today!

Join now to receive free daily science news delivered straight to your email.