Is ADSBx blocking ground movements on ADS-B? Or is there a setting I can make to show aircraft on the ground? I did hit something a while back and it showed the SuperTugs at KIAH as TIS-B, but not sure what I did. I know airportviewer shows them, but thinking there may not be a feed close enough to cover the airport grounds. Thanks, Chris
Why would that be the first thing to ask, it's almost rude ;P Check the gear icon menu. Why shouldn't adsbexchange be in a similar situation? TIS-B is only broadcast in certain circumstances and in many places goes on and off on a whim. Something about and ADS-B-in capable aircraft (not many) being nearby.
Maybe blocking is the wrong word, but automatically filtering ground level reports or something. As adding ground level aircraft would add many more tracked aircraft to the database. I went over to KDFW and see ground movement of A/C so I am thinking it is a coverage thing. KIAH cuts out at about 175' from the ground. Thanks, Chris
I see planes taxiing on the ground at Dulles, Reagan and BWI all the time. It's probably because there's at least 1 ADSB feeder near the airport that can see them.
Hi Chris, Don't let the emotional responses get to you. We all get them. I can see the ground movement of aircraft at a couple of nearby airports through my feeder and others as well.
Dear all, ( I am a new member; currently setting up a new feeder...; and maybe using some data for commercial analysis - and of course willing to pay ) I would like to step into this discussion with a similar question: I am also interested to follow aircraft ground movements. What is the algorithm that is used to by Adsbexchange's servers to stop saving aircraft positions? When the transponder is shut off? Or after X minutes of non-movement? Let's say an aircraft landed, taxis a little bit and has to wait for 10 minutes before continuing to the final gate. Will I see the whole track? Thank you very much for this great project! Jens
If the aircraft transmits ADS-B positions and we have a receiver that receives it, a track will be recorded. MLAT positions will also be recorded, but MLAT coverage usually doesn't reach the ground as you need 4 receivers for a position, also less accurate. Click the history on the left side of the page (in the aircraft details) to see past flights. If you'd rather see 24h of track instead of just the last flight (leg), change that option in the gear menu or by pressing shift-L The heuristic to determine when a new leg / flight starts doesn't always work and it has some variability. As such the taxi in and out depending on a couple of factors might be either attributed to the next or previous flight instead of perfectly "cutting" when the aircraft is at the gate.
Hi Jens, My feeder is within range of an airliner MRO (maintenance, repair, overhaul) facility. It picks up airliners that have turned on their ADS-B transmitters, turned them off and back on again while on the ground but do not move during ground tests. It also picks up US Air Force planes at a nearby USAF base sitting on the ground before take-off and after landing but stationary. HTH
