December 2016 Rangeplot

from Planeplotter

 

(click to enlarge)

 

and from Virtual Radar Server

 

(click to enlarge)

 

Range rings are back to being in kilometers, with the outermost red ring being 400kms.

 

The aircraft up near Cold Lake at 4225 feet is not real. It is an artifact from a garbled signal received a few days ago, that didn't clear out properly.