中性大气折射延迟主项的级数展开式  

The Series Expansion of the dominant term in Neutral Atmospheric Refraction Delay

作　　者：张捍卫[1] 雷伟伟[1] 丁安民[1] 

机构地区：[1]河南理工大学测绘学院,焦作454003

出　　处：《地球物理学进展》2014年第6期2600-2603,共4页Progress in Geophysics

基　　金：国家自然科学基金(41172199)资助

摘　　要：中性大气折射延迟是空间大地测量技术中的重要研究课题之一.本文在Saastamoinen(1973)的理论基础上,重新研究了大气折射延迟的级数展开理论,给出了一个新的级数展开式.新级数展开式能够展开到任意阶次项,并且理论上达到了亚毫米量级;另外,把地面附近的群折射指数作为未知数单独提出来,适应了不同技术在不同观测波长情况下的处理,最终给出了以视天顶距正割为引数的级数展开式.利用本文成果可进行射线跟踪的理论研究.The correction of Neutral Atmospheric Refraction Delay（NARD）is one of the important research topics in space geodetic techniques. On the basis of the literature of Saastamoinen（1973）,this paper restudied series expansion theory of NARD,provided a new series expansion.The new expansion can expanded to the arbitrary order and times items,and reached the sub-millimeter theoretical accuracy.In addition,the group atmospheric refractive index near the ground had been extracted from the expansion,as a single unknown parameter.So,new expansions adapted to different observation wavelengths processing of different techniques.Finally,the new series expansion has been given,which making secant of visual zenith distance as a argument.Using This result can also be applied to theoretical research of ray tracing.

关 键 词：中性大气折射延迟 级数展开式 大气折射指数 亚毫米量级 

分 类 号：P228[天文地球—大地测量学与测量工程]