Hi, I recently set up a PiAware instance, but am having issues getting results I think I should be getting. I am using the FlightAware Plus (blue dongle).
First, the history. While configuring and waiting to install the antenna on the roof, I had the antenna direct connected to the SDR, which was direct connected to the Pi in a south-facing window. I routinely got hits in the 200-250 mile range to the south (not much in the north, obviously). I then moved the antenna to the roof, still direct connected to the SDR. I ran a USB cable from the roof to the Pi.
I was again getting 200+ mi hits, but only to the north- I realized that the very apex of the roof was blocking my line of sight to the south. So I moved it again:
(under a basket to keep it out of the direct sun, but the antenna has full 360 line of sight).
Once I moved it, I encountered the issues. My ADS-B and MLAT positions dropped significantly. May 8th was the day the antenna was first moved to the roof, and May 24th it was repositioned, you can see the dropoff here:
You can see the steep transition from ADS-B and MLAT to ‘other’ signal types.
For fun, I ran a spectrum scan, I don’t know if that will help:
Does anything here jump out as being a cause for the degradation of ADS-B signal processing? I have the Plus, so there should be a filter helping things along… any thoughts on improvements? Thanks