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Constructing an observational model of the neutral atmospheric refraction delay from measured values of the astronomical refraction
Mao W(冒蔚)1; Li, B2; Yang L(杨磊)1; Tie QX(铁琼仙)1; Zhang HW(张捍卫)1,3; Mao, W (reprint author), Chinese Acad Sci, Natl Astron Observ Yunnan Observ, Kunming 650011, Peoples R China.
Source PublicationASTRONOMICAL JOURNAL
2007-11
Volume134Issue:5Pages:2054-2060
DOI10.1086/522943
Contribution Rank第1完成单位
Indexed BySCI
KeywordAstrometry Atmospheric Effects Instrumentation : Miscellaneous Methods : Data Analysis
AbstractDiscussing the requirements for an accurate correction of the neutral atmospheric refraction delay for the Global Positioning System, our paper points out that the existing theoretical correction models and the old postprocessing methods cannot attain the anticipated accuracy because the atmospheric refraction index has not been directly determined precisely. It is necessary to adopt atmospheric refraction delay models to improve the correction accuracy. The models are dependent on the observing station and the observation azimuth. By the new method we propose in this paper, the observational data of astronomical refractions at different azimuths and different zenith distances are grouped according to azimuth and used to calculate the refractivity and mapping functions. As an example of the newmethod, we introduce the configuration of the Lower Latitude Meridian Circle and the measurement method of instantaneous astronomical refractions, and present the observational astronomical refraction model toward the east, south, west, and north of the Yunnan Observatory. We estimate that, without the use of any atmospheric distribution models, the correction accuracy of the zenith delay will be within 1 mm, the correction accuracy of the refraction delay at the lower elevation will be improved to a centimeter magnitude, and the cutoff elevation angle will be reduced to 5 degrees or less.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-6256
URL查看原文
Archive Date2008-04-02
WOS IDWOS:000250518400030
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordTRACKING DATA ; GRADIENTS ; INTERFEROMETRY ; PREDICTION ; PROFILE ; SYSTEM ; LLMC
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6636
Collection天体测量及应用研究组
Corresponding AuthorMao, W (reprint author), Chinese Acad Sci, Natl Astron Observ Yunnan Observ, Kunming 650011, Peoples R China.
Affiliation1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China
2.Kunming University of Science and Technology, Kunming 650051, China
3.Xuzhou Normal University, Xuzhou 221116, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Mao W,Li, B,Yang L,et al. Constructing an observational model of the neutral atmospheric refraction delay from measured values of the astronomical refraction[J]. ASTRONOMICAL JOURNAL,2007,134(5):2054-2060.
APA Mao W,Li, B,Yang L,Tie QX,Zhang HW,&Mao, W .(2007).Constructing an observational model of the neutral atmospheric refraction delay from measured values of the astronomical refraction.ASTRONOMICAL JOURNAL,134(5),2054-2060.
MLA Mao W,et al."Constructing an observational model of the neutral atmospheric refraction delay from measured values of the astronomical refraction".ASTRONOMICAL JOURNAL 134.5(2007):2054-2060.
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