低高度角处的蒙气差级数展开式  

The Series Expansion of Astronomical Atmospheric Refraction for Low Vertical Angle

作　　者：张捍卫[1] 雷伟伟[1] 丁安民[1] 

机构地区：[1]河南理工大学测绘与国土信息工程学院,焦作454003

出　　处：《天文学报》2013年第6期562-568,共7页Acta Astronomica Sinica

基　　金：国家自然科学基金项目(41172199;41272373)资助

摘　　要：天文大气折射改正是天文和测地学中的重要课题之一.在Saastamoinen大气折射理论基础上,重新研究了天文大气折射的级数展开理论.在亚毫角秒理论精度上,给出了一个包含水汽影响、可以展开到任意阶次、能够在极低高度角具有收敛性的蒙气差级数展开式,同时给出了多元大气层和等温层对蒙气差影响的理论模型.计算表明,可利用此新方法进行射线跟踪的理论研究.The correction of the Astronomical Atmospheric Refraction （AAR） is one of the important topics in astronomy and geodesy. Based on the theory of Saastamoinen at~ mospheric refraction, the series expansion theory of AAR is restudied in this paper. In the submilli-arcsecond theoretical accuracy, a new series expansion of AAR is provided. The new expansion contains the influence of water vapour on AAR which can expand to the arbitrary order and times items, and shows tile convergency in the regions with low vertical angles. At the same time, this paper gives a new theoretical model which describes the influence of polybasic atmosphere and isothermal layer on AAR. The calculation shows that this method can also be applied to the theoretical research of ray tracing.

关 键 词：天体测量学 基本天体测量 大气效应 方法 其他诸多方面 

分 类 号：P126[天文地球—天体测量]