PPRuNe Forums - View Single Post - Air Asia Indonesia Lost Contact from Surabaya to Singapore
Old 28th Dec 2014, 18:05
  #191 (permalink)  
Join Date: Jun 2009
Location: Germany
Age: 67
Posts: 782

This flight was on primary radar when lost. Hence this is nothing like MH 370.
I'm sure you mixed primary and secondary radar. ATC works with secondary radar, which is the interaction of ground station with aircraft transponder, what you see on the scope is the signal information of the aircraft transponder.

Primary radar is an active ground radar and its reflected energy displayed on a radar scope.

The time where radar contact was lost points only to the point, where the aircraft transponder stopped transmitting. There are multiple reasons for such an occurance.

Last edited by RetiredF4; 28th Dec 2014 at 19:26.
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