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《Journal of Jimei University(Natural Science)》 2008-03
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Observing Accuracy of Zenith Distance and the Standard Recommended

WU Guang-hua,HU Wen-cai,LI Zi-fu(Navigation Institute,Jimei University,Xiamen 361021,China)  
To get the observer's Lat.and Long.just by pressing a button without the sea horizon to turn to,we should know clearly the relationship between the accuracy of zenith distance observed and the accuracy of a position fixed,the causes of the errors of zenith distance observed,what accuracy of zenith distance observed could be obtained and what accuracy standard should be used.Error causes are analyzed,and it is recommended that the 2' could be used as the accuracy standard for civil user at present,when measuring zenith distance based on the direction of gravitational force line.The result of the theory research and test at sea indicates that in this way we could get accurate celestial positioning and lower price.
【Fund】: 福建省自然科学基金资助项目(A0440003)
【CateGory Index】: U666.131
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【Citations】
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