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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.
发表期刊ASTRONOMICAL JOURNAL
2007-11
卷号134期号:5页码:2054-2060
DOI10.1086/522943
产权排序第1完成单位
收录类别SCI
关键词Astrometry Atmospheric Effects Instrumentation : Miscellaneous Methods : Data Analysis
摘要Discussing 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.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6256
URL查看原文
归档日期2008-04-02
WOS记录号WOS:000250518400030
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]TRACKING DATA ; GRADIENTS ; INTERFEROMETRY ; PREDICTION ; PROFILE ; SYSTEM ; LLMC
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6636
专题天体测量及应用研究组
通讯作者Mao, W (reprint author), Chinese Acad Sci, Natl Astron Observ Yunnan Observ, Kunming 650011, Peoples R China.
作者单位1.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
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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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