한국항해학회지 (Journal of the Korean Institute of Navigation)
- 제13권1호
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- Pages.1-10
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- 1989
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- 1225-0481(pISSN)
쌍곡선항법시스템을 이용한 직각항법에 의한 측위정도 향상에 관한 연구
A Study on the Position Accuracy Improvement Applying the Rectangular Navigation in the Hyperbolic Navigation System Area.
초록
Nowadays Hyperbolic Navigation System-LORAN, DECCA, OMEGA, OMEGA-is available on the ocean, and Spherical Navigation System, GPS (Global Positioning System) is operated partially. Hyperbolic Navigation System has the blind area near the base line extention because divergence rate of hyperbola is infinite theoretically. The Position Accuracy is differ from the cross angle of LOP although each LOP has the same error of quantity. GDOP(Geometric Dilution of Precisoin) is used to estimate the position accuracy according to the cross angle of LOP and LOP error. Hyperbola and ellipse are crossed at right angle everywhere. Hyperbola and ellipse are used to LOP in Rectangular Navigation System. The equation calculating the GDOP of rectangular Navigation System is induced and GDOP diagram is completed in this paper. A scheme that can improve the position accuracy in the blind area of Hyperboic Navigation System using the Rectangular Navigation System is proposed through the computer simulation.
키워드