I am currently working on the Raspberry Pi I have installed in the loft as a web server and aircraft spotter. It’s been a while since I mentioned it here. I thought I’d just chuck up some images.
This picture gives an idea of how many aircraft can be tracked at once. Be aware this was early on a Sunday morning.
This splat shows how far away aircraft are detected. Please note I am not where the blue dot is, that would be quite weird. The smallest locus is up to 9,999 ft, the green is 10,000 to 19,999 ft, the purple is the 20,000s and the red is above FL300.