ADS-B Advisory Services: Coverage Essentially Complete in Lower 48

According to the latest maps available from the FAA, the network of ground-based transmitters for ADS-B Broadcast Services (TIS-B and FIS-B) now provides coverage throughout the continental US.

Update: The FAA published a press release on April 14, 2014 announcing the completion of the ground infrastructure, which includes 634 radio stations.

The following diagram shows the locations of the operating transmitters as of late March 2014.


And here’s a diagram that shows the coverage provided by the network. Note that these service volumes assume you are high enough to receive the broadcasts, typically at or above about 1,500 feet AGL, depending on your distance from a transmitter.


Here’s an FAA video that describes ADS-B Broadcast Services.