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| The calculation research of hyperbolic navigation position fixing based on double station chains loran c navigator |
| Min Sihe①; Wang Jiachi①; Jiang Taihu①;i Tian Zhenhua② |
| School of Information; Wuyi Univ.; Jiangmen 529020; China |
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Abstract This paper presents a method which links direct solution and Newton iterative method to calculate ship s position. First, a result of the combination hyperbolic equations is got using the direct solution on the sphere and is taken as the ship s approximate position. Then, Newton iterative method is applied to caculate △λ and AA. When △ψ and △λ are less than ε which is given as a convergent standard beforehand, the ship s position calculated is the correct one. In general, only iterating two or three times, the calculating accuracy is about one second.
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Received: 22 October 2001
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2003, Vol. 25 
