FlightAware Discussions

Question about "Positions reported"

Do we have some more technical details how these are calculated/determined?

I’m wondering how large differencies can happen with a similar amount of aircraft.
One extreme example is this receiver located in Switzerland with almost 10 times higher position rate.

wbaumann ADS-B Feeder Statistics - FlightAware

Is it just because he’s close to ZRH Airport? Or is the range another factor?
Would like to get a little more insight on position reporting on ADS-B

Local beacons, there seem to be a lot of messages without many aircraft?

That’s my question. I would like to understand in general the count of positions

Technical details? Sure. Start at https://github.com/flightaware/dump1090/blob/4cde98e063a4830ff61554451859653d125bda34/net_io.c#L2445

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I am not a developer, but can read and understand most of it.