It is now 5 years since SPHERE has been providing a live feed for Live ATC @ Sydney Airport YSSY. This is a network of live Air traffic Control radio frequencies around the world that anyone can access using an iOS or Android APP. The live feed that SPHERE provides is uploaded to the Live ATC servers in the US 24/7. The live audio feed has been upgraded to include more air traffic control frequencies with the addition of another VHF receiver. If you're interested in listening to air traffic from almost any city or country in the world then try this great APP from LiveATC.