Hi there. I am new to this but have managed to set up a ADS-B receiver with a Raspberry Pi. It now working well on my garage roof and seems to be tracking aircraft as will as I can expect considering the geography of where I am. I have been monitoring its performance by watching the "FR24 Feeder Tracked Aircraft List" screen obtained by selecting the local IP address with the :8754 suffix.
Most of that data is obvious but I notice a couple of things. When an aircraft first appears on the horizon and the signal is presumably weak, the only data that appears is the Mode-S ID and the altitude. The other fields usually fill in with time. Sometimes they don't. An aircraft yesterday flew virtually overhead yet it never displayed Lat or Long the whole time. However that flight was correctly displayed on FlightRadar24 the whole time.
As I understand it, all that data is broadcast with ADS-B the whole time. Is there a priority that this data is broadcast at ie. ID and altitude top priority, the rest when the signal is strong enough? Why was the aircraft I saw yesterday (a small commercial operator) not displaying lat & long?
Thanks in anticipation.
Most of that data is obvious but I notice a couple of things. When an aircraft first appears on the horizon and the signal is presumably weak, the only data that appears is the Mode-S ID and the altitude. The other fields usually fill in with time. Sometimes they don't. An aircraft yesterday flew virtually overhead yet it never displayed Lat or Long the whole time. However that flight was correctly displayed on FlightRadar24 the whole time.
As I understand it, all that data is broadcast with ADS-B the whole time. Is there a priority that this data is broadcast at ie. ID and altitude top priority, the rest when the signal is strong enough? Why was the aircraft I saw yesterday (a small commercial operator) not displaying lat & long?
Thanks in anticipation.
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