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Submitted on: 14 July 2012.
Revised on: 04 October 2012.
Accepted on: 03 November 2012.
___________________IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
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Submitted on: 16 January 2014.
Revised on: 15 February 2014.
Accepted on: 27 March 2014.
___________________IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS