February 2017 Rangeplot

 from Planeplotter

 

 (click to enlarge)

 

and from Virtual Radar Server
 

(click to enlarge)

 

Occasionally, there will be brief times when atmospheric conditions are 'just right' and aircraft that would normally be out-of-range, can be received. For some reason that I'm not able to explain, this happens most frequently to the south-east, as can be seen in the plot from Virtual Radar Server. The red rings are 100 kilometers apart, so that would place this particular distance at well over 500 kilometers.

 

Outdoor temperatures during February ranged from +8C to -30C. During this month the core temperature of the OrangePi PC out on the roof varied from +25C to -4C and both it and the Flightaware ProStickPlus receiver connected to it continued to perform flawlessly.