I am close to a flight path for Logan Airport (BOS), with jets coming over within a mile or so at about 15,000 ft. I had noted a while back that I lose planes overhead occasionally, and a reply to my post suggested experimenting with gain. I’ve tuned it pretty well, but I’m still seeing this behaviour occasionally, and it appears to be with MLAT contacts only.
Ok, I think I can understand that since you want the correlating ground stations to be spread out to get sufficient TDOA measurements, and perhaps when overhead I lose a little signal strength and other stations may “take over” on the data feeds.
What I don’t get is that often the plane will just completely disappear for me. It’s tracking fine inbound, then maybe pauses and goes white and turned north on the Skyview* display, but never gets reacquired. Due to the actual proximity I’m sure I don’t completely stop receiving the aircraft signals, but perhaps the FlightAware receiving system has in effect counted me out and doesn’t bother to welcome me back when I have more proper data? It’s just that those planes never show up on my Skyview server again, even though they are on the FlightAware tracking site and should certainly be visible to me.
Can any system developers involved in the MLAT processing chime in as to why this is happening?
*BTW when I first set up my station I had to laugh that the web display component is called Skyview, as my feeder station is named Skyview since I live on Skyview Dr…