Можно и за бесплатно
Each month we send out complete ADS-B receiver kits that include an ADS-B receiver, antennas, and all necessary cabling to qualified hosts.
You can apply to host one of our receivers or easily build your own. The dozens of new Flightradar24-supplied receiver kits and the hundreds
of home-built receivers activated in February, combined with over 20, 000 existing receivers, helped us track 5.4 million flights.
https://www.flightradar24.com/ ...
Целеполагание трансформировалось да и хрен с ними, раз не в тех руках оказались.