I’ve been working on developing my own style home brew antenna. It’s a sort of fork from the theory of spider style, with some practical observations and tweaks mixed in on top of that basic style.
PiAware 3.5 is on a Raspberry Pi 2, with an FA orange dongle, and has an FA filter fitted to the input connector of the dongle. After that is about 5-6 metres of RG6 with as few connectors as I can manage (fewer still later this week hopefully)
Anyway, I had been getting the usual 150NM or so contacts the or so could extend to 3-4-5 hundreds in a few of the spikes.
Anyway, I grab data from this on my main desktop machine, and that done with VRS. After some serious setting up of that to get it reliable, I am seeing spikes of far greater distances, up in the 1700-2000NM range. I can track these for maybe 30 minutes sometimes. By then they are less spikes and more wedges pointing back to the RX location.
Oddly these are not registering at FlightAware on my stats page. Conversely I’ve seen stuff there in excess of 200NM which did not show in VRS. Obviously these are NOT MLAT contacts, but hard won by me and my design.
Why might these discrepancies exist?
VRS is getting it’s info from PiAware, so why isn’t FlightAware making use of the data I am collecting?
It is starting to feel a bit pointless collecting it to start with. Never mind how I’m starting to feel about all the effort I have put in to develop the antenna design. It is certainly not good seeing it dealt with in this way.