Thanks for the reply.
I checked quite a few track logs and it does appear that Aus ATC (ADS-B) data is used even where there should be heaps of independent feeder data.
Even in areas where there are large numbers of independent feeders covering that airspace. Eg. Final minutes of approach to Melbourne airport. 83% of track log entries are Aus ATC (ADS-B).
Whereas looking at random flights over the UK it is the independent feeders data that is logged 99% of the time.
Does Aus ATC (ADS-B) data have a higher priority or is it based on signal level, data delay or something like that. Is it the first source to send a location message in that time block that is used?
If the independent feeder positional messages contain more interesting data and are a truer (unprocessed) source of data shouldn’t the Aus ATC (ADS-B) data be used only where there was no independent feeder data?
Not trying to be confrontational, just keen to know the value of the data i provide. If the independent feeder data was the preferred data source then great, i am doing something really useful. If it isn’t then i am just providing data redundancy and that feels much less thrilling. Edit: oops, wrong smiley used. As Oh from the movie home would say “reply all right next to reply is bad design”, Mad right beside laughing is bad design.