Do UFOs have ADS-B out?
Recently upgraded my conspicuity awareness by fitting a SkyEcho 2, and it WiFi's to the phone I run Skydemon on. This Bluetooth's to my new headset, so I get audible warnings from Skydemon about airspace nearby, entering runways etc, and most importantly about conflicting traffic it can detect (with the extra subscription, I can also see Flarm targets, which is why I particularly wanted it - I have trouble spotting gliders!).
Anyway, routing back from Shoreham fly-in yesterday, it warned me twice in quick succesion - first was an aircraft crossing left to right in front of me 400 feet above, and then shortly after, one overtaking me from behind, again 400 feet above. In both cases it told me the speed of the traffic was 3960 knots! Unsurprisingly, I saw neither target. Hence the question........was I being checked out by a higher being, or what could cause such a spurious indication? Anyone else experienced anything similar?