I am trying to use FlightAware to provide fairly accurate position and times for aircraft in my area. I have two questions:
Where does the PosTime time tag come from? It is quite poor, and clearly incorrect. For a single aircraft it jumps forward and back constantly, and if I sort the outputs using that time, it is nonsensical (making the aircraft hope around). If I want a good time tag for positions on aircraft, what should I do? What should I use?
MLAT accuracy, while better than nothing, is still not good enough for my purposes. Because of that, I am very sensitive to how many aircraft are using MLAT rather than direct ADS-B reported positions. I note that many aircraft that say are using ADS-B are still getting MLAT positions. Also, I note that many large commercial carriers, which I assumed are already upgraded are still showing MLAT as well (notably, most JetBlue aircraft, who have been otherwise early adopters of ADS-B). Is there a possibility that MLAT is overwriting more accurate ADS-B positions, by any chance? If so, that is a serious bug. If not, just what percentage of commercial jetliners should I expect to still have MLAT solutions?
Thank you all very much for any help you can provide!