The Kiwi SDR network or receivers allows you to direction find HF transmitters, by using the inbuilt Time Difference of Arrival (TDoA) functionality. TDoA is a method of measuring RF propagation from two or more receivers in an effort to establish the location of the transmitter. You can watch a demonstration of how TDoA works […]
Much has been written about number stations over the years, although little is known for fact. We do know they often broadcast on a schedule, so with a little planning, it is quite easy to receive them for yourself. Online SDR receivers take this to a new level, and now with TDoA, we are able […]
Pirate radio stations around 6MHz have been using that part of the spectrum for many years. They often populate that part of the band, and in the main don’t seem to cause the primary users any issues. The primary users sometimes put a STANAG signal on top of the pirate music station, I doubt they […]