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A Possible Means of Improving the Accuracy of Refraction Delay Correction of Neutral Atmosphere
Wei Mao1; Hanwei Zhang1; Binhua Li2; Lei Yang1; Qiongxian Tie1
2007
Source PublicationChinese Astronomy and Astrophysics
ISSN0275-1062
Volume31Issue:2Pages:211
AbstractThe space geodetic technology requires an accurate model of correction of refraction delay by the neutral atmosphere that varies from one observing station to another, and from one azimuth to the next. It is pointed out that under the present condition the astronomical refraction can not yet be directly determined, any correction model because of its high dependence on the assumed atmospheric distribution, is incapable of achieving the required accuracy or of improving the cut-off altitude. In this paper, based on the special properties of the lower latitude meridian circle at Yunnan Observatory and our experience of determining atmospheric refraction therewith, a new method is proposed for improving the accuracy of refraction delay correction. Namely, the measured data of astronomical refraction of an observing station from near zenith to low altitudes in different azimuths are used to evaluate the refractivities and the parameters of the mapping functions, thereby establishing a model of atmospheric refraction delay correction that varies with the observing station and the azimuth. Since it is unnecessary for the new method to adopt any atmospheric distribution model, application of this new method will improve correction accuracy of refraction delay to better than 1mm at zenith and to centimeters at low altitudes, and improve the cut-off altitude to below 5 degrees.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/44655
Collection中国科学院国家天文台
Affiliation1.中国科学院国家天文台
2.中国科学院信息工程研究所
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Wei Mao,Hanwei Zhang,Binhua Li,et al. A Possible Means of Improving the Accuracy of Refraction Delay Correction of Neutral Atmosphere[J]. Chinese Astronomy and Astrophysics,2007,31(2):211.
APA Wei Mao,Hanwei Zhang,Binhua Li,Lei Yang,&Qiongxian Tie.(2007).A Possible Means of Improving the Accuracy of Refraction Delay Correction of Neutral Atmosphere.Chinese Astronomy and Astrophysics,31(2),211.
MLA Wei Mao,et al."A Possible Means of Improving the Accuracy of Refraction Delay Correction of Neutral Atmosphere".Chinese Astronomy and Astrophysics 31.2(2007):211.
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