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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41548

Title: New computational approaches to determine the astronomical vessel position based on the Sumner line
Authors: Chih-Li Chen
Tien-Pen Hsu
Guo-Yu Weng
Contributors: 國立臺灣海洋大學:商船學系
Keywords: celestial navigation
astronomical vessel position
Sumner line
iteration scheme
Date: 2015-01
Issue Date: 2017-03-01T07:17:01Z
Publisher: Polish Maritime Research
Abstract: Abstract: In this paper two new approaches are developed to calculate the astronomical vessel position (AVP). Basically, determining the AVP is originated from the spherical equal altitude circles (EACs) concept; therefore, based on the Sumner line's idea, which implies the trial-and-error procedure in assumption, the AVP is determined by using the two proposed approaches. One consists in taking the great circle of spherical geometry to replace the EAC to fix the AVP and the other implements the straight line of the plane geometry to replace the EAC to yield the AVP. To ensure the real AVP, both approaches choose the iteration scheme running in the assumed latitude interval to determine the final AVP. Several benchmark examples are demonstrated to show that the proposed approaches are more accurate and universal as compared with those conventional approaches used in the maritime education or practical operations.
Relation: 21(4)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41548
Appears in Collections:[商船學系] 期刊論文

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