This image is from my Skyview display. I have 2 TEST1234 ident tracks with no heading/distance info nation with huge message numbers- 400,000 plus. See attached picture.
Any idea where these are coming from? My antenna location is marginal at best so the signal has to very strong to get to me.
I’m near Kansas City International airport, both Garmin and King Avionics are located within 30 mile also.