Thanks for the info Robert, you have some good consistent range on those polar plots.
This is my current Polar Plot (Orange) and that from another station (Purple) that is feeding data to our system. The house next door affects
my reception to the west. Both these stations are using the 7 Segment Coaxial Collinear Antenna from DPD Productions in California. Location
in respect to higher terrain can make a big difference to reception. My best reception was to the northeast during Tropospheric Ducting - 648.2nm
(1,201.2km).
All the data relating to our site (Orange) can be viewed at
http://adsb.16right.com/analytics/