This includes two tracks in Dutch airspace, one arriving and one departing. Pretty amazing for a device that was overpriced at £25!
And a bit further again, 157 miles:
He came right past me and then on out to the west, being tracked for 213 miles. Note that the packet counts are the number of position reports being forwarded to Xastir. Many more ADS-B frames are being received than that.
And something out in the North Sea. Didn't see anything that far out up there with the USRP/WBX.