Hi From my understanding adsbexchange is not restricting any traffic, however I've just noticed discrepancies between adsbexchange and aviation planning app (similar to foreflight). Please advise Thanks
You have no idea what kind of data sources foreflight is using. Some tracking sites are using ATC radar data which we don't have access to (one of the reasons is we don't filter and that's a requirement when getting most ATC data feeds). If we would be receiving that plane, it would be on the map. (unless you have some filters active in the webinterface or something)
Thanks for response wiedehopf I have seen this traffic yesterday and every day before on tar.adsbexchange website, until now. Regardless, aircraft at 13000ft above 5million people city, should be seen. Unless there must be something new I guess.
Could be only ModeC transponder. That doesn't work for MLAT (it could in theory but we would only know there is an object and its squawk and it's unreliable, no identity, no callsign) ATC radar data will include ModeC though. Police like to get exceptions so they aren't trackable, i wouldn't be surprised if they did just that. Or it's just an older aircraft ..... So MLAT needs a ModeS transponder. And ADS-B well needs an ADS-B transponder (ModeS transponder with extra stuff basically)
