Aircraft travels 1800 km in one minute

Hi there,

I’m looking at flight aware ID: UAL89-1375162290-airline-0071
At 2013-08-01 18:41:11 the aircraft is at: 43.43,-72.05
A minute later at 2013-08-01 18:42:11 the aircraft is at: 59.25,-72.15

Please explain what’s happening here.

Thank you.

That’s the actual data that we received from Montreal Center ATC. They probably had a radar glitch of another aircraft being assigned the same transponder code briefly.