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Submitted on: 23 November 2019.
Revised on: 14 December 2019.
Accepted on: 30 January 2020.
___________________IEEE AEROSPACE AND ELECTRONIC SYSTEMS MAGAZINE
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Submitted on: 06 April 2007.
Revised on: 15 July 2007.
Accepted on: 02 August 2007.
___________________IEEE AEROSPACE AND ELECTRONIC SYSTEMS MAGAZINE
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