1. For ADS-B out, you, of course, need all the requisite sensors (GPS, etc).
2. The correctness of ADS-B data protects human life. Naturally there will be much stricter requirements (certification of reliability) on something that produces this data and introduces it to the system, than for a "just for fun" receiver.
2. The correctness of ADS-B data protects human life. Naturally there will be much stricter requirements (certification of reliability) on something that produces this data and introduces it to the system, than for a "just for fun" receiver.