Further testing this evening at the SVMC fly-in (thanks to Brian Finch for catering) at Long Marston. Looks like we have a reasonably robust unit design now.
Here's some screen shots of me being tracked by a pilotaware ground station (in yellow) climbing out of Long Marston on 02, immediately picking up some unidentified passing, potentially conflicting, traffic (later identified as '406792' out of Wellesbourne, this is not a set-up), immediately above and ahead of me, I am climbing right towards him although I have no visual.
http://www.flightradar24.com/data/ai...g-rvah#7196741
First shot shows him 430' above me, (all offset heights are references against the monitoring ground station), then 340', then 240', then 100', then 100' below me. Picked him up way before I actually saw him. Ok hands up, I never saw him at all, although they could see him from the ground and were collectively catching their breath (must have looked closer than it was from that angle).
https://www.dropbox.com/s/wf0r4xfber...26.18.jpg?dl=0
https://www.dropbox.com/s/87cn2al222...26.16.jpg?dl=0
https://www.dropbox.com/s/39gg9lj349...26.22.jpg?dl=0
https://www.dropbox.com/s/ejna8dir6q...26.19.jpg?dl=0
https://www.dropbox.com/s/4v7phew7f3....20-1.jpg?dl=0
remember this is a non commercial initiative, build your own box, details here
http://www.pilotaware.com/