I am trying to research how much of US commercial flight is actually using the NextGen system. My interest in this is from the angle of Public Policy, rather than as an avaiation nerd - so please excuse my mistakes (if any that follow).
As I understand, NextGen requires equipment at both the aircraft and airport ends.
I can get data about NextGen equippage at airports, but am not able to identify what aircraft is equipped with ADS-B. Is there a way I can get that information through the FAA database? Or any other database?