Recently, I am building a system that using R820t receiver to receive ADS-B data send from a SkyEcho transmitter. According to UK law, I must apply for a licence to send out ADS-B signal on 1030 MHz band. Some people has claimed that it is possible to use ICAO address 000000 as a testing aircraft code without a licence. Can anyone prove this with related information?
Or can anyone recommend me any method that I can detect an aircraft without licence?