Fun fact! Your GPS won't work if you're above 18Km or going faster than 500 metres per second. Just in case you're a Soviet Guided Missile.

But if you're on a regular international flight, you should be just fine! Here are some screenshots I took using the open source GPS Test for Android.

Top tips: make sure you get a GPS lock and update your A-GPS data. It's also worth getting as close to a window as possible in order to see the sky without the metal shell of the aeroplane blocking you.

What a glorious sight! American GPS, Russian ГЛОНАСС, China's 北斗, Japan's 準天頂衛星 and the EU's Galileo. I was asleep when we went over India, so I don't know if my phone would have picked up NavIC.

The sky view is particularly beautiful.

I also found a page on British Airways' inflight WiFi which showed what the plane itself was reporting.

My cheap phone and the multi-million pound plane disagree slightly on speed and height. But not by much!

I was also able to take these geo-tagged photos of Australia from the plane.

Sydney

Desert

So, next time you're on an international flight, take a peek at the sky!