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Enhanced radar positioning is a proposal for a position fixing system in maritime navigation, based on radar navigation. It is the automation of the process of determining own position by means of radar fixing, using a multitude of objects with known position as reference. The proposal was originally made by Jens K. Jensen from the Danish Maritime Safety Administration in 2009, in relation to the need for an independent source for position fixing, due to the vulnerabilities of GPS and other satellite navigation systems, identified during the work at IALA on IMO's e-Navigation strategy. This proposal is currently being brought forward to the maritime industry through IALA, and an opportunity for practical testing of the concept in 2011 is being considered in the EfficienSea project〔(EU part-financed project: Efficient, Safe and Sustainable Traffic at Sea )〕 partly financed by the Baltic Sea Region Programme〔(Baltic Sea Region Programme 2007-2013 eu.baltic.net )〕 and coordinated by the Danish Maritime Safety Administration. ==Principle== The navigation radar of a ship is currently considered a primary position verification device by navigators, as the radar can be used to identify conspicuous objects or coast lines, giving range/bearing to objects of a known charted position. If a radar target - and thus the associated range / bearing of a conspicuous object - can be automatically correlated with the known position of that object in an automated manner, radar can be upgraded to an automated positioning system - or position verification system - and may ultimately function as a terrestrial back-up option for satellite positioning (GNSS). Enhanced radar positioning is achieved through the continuous automated process of correlating a multitude of radar targets with a list of known objects in the vicinity of a vessel, with known position. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Enhanced RADAR positioning」の詳細全文を読む スポンサード リンク
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