Ghost images??

[BigFlapper]

Yesterday I was practicing touch n gos at our airport and when departing I picked up an aircraft behind me with the projected path crossing my flight path. The symbol had a +03 on it. I turned 45 deg left and the path projection paralleled my flight path. I have just recently added the ADSB module to my Skyview and it seems to be working fine. I never saw the plane and it wasn't showing the "N" numbers. If it was an echo of my plane wouldn't it show my "N" numbers?

 

[dynonsupport]

Ghost targets are currently an unfortunate reality in the way the ADS-B system is designed. The first time the radar sweeps you, it may not get all the information it needs, including N-number and direction. However, it still considers that a valid target and relays that to the system. When it sweeps you again, it might get all the info it needs, but you've now moved from your previous location. The system reports both the old target and new target.

SkyView automatically filters out ghost targets IF they include your own N-number. But, as discussed above -- and as you likely experienced -- the ghost target didn't include your N-Number. As a result, SkyView (or any product) does not have the information it needs to say that that target is you, resulting in us reporting both.

We have been working with the FAA this, and hope that they implement better filtering.

There's a few other posts throughout the forum that have more discussion on this:
http://dynonavionics.com/cgi-bin/yabb2/YaBB.pl?num=1399819557
http://dynonavionics.com/cgi-bin/yabb2/YaBB.pl?num=1381721743

 

[BigFlapper]

Thanks for the update, other than "Ghosts" the system is a real bonus. Yesterday it picked up the traffic helicopter that was hovering around 800 ft. didn't know it could pick up a low target that well.