This broadcast is the public AM frequency 128.625MHz which is designated as the Common Traffic Advisory Frequency for the airspace controlled by Arlington Municipal Airport. The only federal agency directly associated with this frequency is the FAA by virtue of the Air Traffic Control tower, however local aviators also participate on this frequency. Due to it being an airband frequency, there is no expectation of privacy or expectation of the conduct of sensitive activities. This signal is captured from within the 76018 zipcode at a fixed receiver site.