ADS-B Coverage
 

Below are links to Google Earth files.

John Collin's kmz Map from Pilots of America WEBSITE.
It shows the actual physical location of ADS-B ground station transmitters.

FAA's kmz file from this FAA WEBSITE.
The FAA's map shows coverage areas. By clicking on boxes, the coverage is shown for various altitudes.
Altitude coverage is a concern for pilots who are in an airport traffic area.
It is too bad that the FAA map does not have a selection for 1000' above the ground because that is the height of many traffic patterns.
Uncheck "RADAR" to see only ADS-B

Amazing that a country that is still years away from the 2020 ADS-B mandate has complete coverage at 5000', yet down here, we require every IFR aircraft to have ADS-B out next year, but our coverage at 5000' is - at best - 40% of the continent...:confused: