Atmospheric Refraction and Building a Local Observational Model
Atmospheric Refraction and Building a Local Observational Model
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发表时间：
2009-04
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通讯作者：
W. Mao;L. Yang;Q. Tie
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作者：
W. Mao;L. Yang;Q. Tie
介绍了天文大气折射在空间大地测量中的一种新应用。为了满足该应用的高要求，有必要发展一种有效的直接测量瞬时大气折射的方法，并建立适应观测站周围地理环境的大气折射模型。简要列出了确定折射值的必要条件。利用低纬度子午圈的结构特点和仪器的误差理论，我们开发了一种用于测量大气折射的方法。直接瞬时大气折射,并建立了云南天文台东、南、西、北按恒星光谱类型分类的局地观测天文折射模型。
A new application of the astronomical atmospheric refraction in space geodesy is introduced in this paper.To meet with high requirement of the application,it is necessary to develop an effective method for directly measuring instantaneous atmospheric refraction and constructing an atmospheric refraction model adapted to the geographical environment around the observing station.Necessary conditions for determining the refraction values are listed in brief.Making use of structural characteristics of the Lower Latitude Meridian Circle and the error theory of this instrument,we have developed a method used to measure directly instantaneous atmospheric refraction,and moreover built a local observational astronomical re fraction model toward the east,south,west and north of Yunnan observatory that is classified according to the star's spectral type.