VLBI中性大气折射延迟的研究进展——映射函数的改正模型  

Research progress on the neutral atmospheric refraction delays for VLBI——correction model of the mapping function

作　　者：张捍卫[1] 郑勇[2] 马高峰[2] 

机构地区：[1]中国科学院测量与地球物理研究所,武汉430077 [2]郑州信息工程大学测绘学院大地系,郑州450052

出　　处：《测绘科学》2003年第4期22-26,共5页Science of Surveying and Mapping

基　　金：国家自然科学基金 (40 174 0 0 2 );国家杰出青年科学基金 (40 12 5 0 13)资助项目

摘　　要：大气传播延迟是空间大地测量技术的主要误差源之一。在射电波段中性大气延迟的影响可从几米到几十米变化 ,即使通过目前某些模型的修正 ,也不能完全消除大气的影响 ,特别是湿大气部分由于变化随机性强 ,很难用模型估计。本文研究了在球对称大气模式下 ,与余误差函数形式相联系的中性大气折射延迟的母函数 ,讨论了与其有关的一些展开式 ,并对各种映射函数进行了比较。In Space Geodesy technology.One of the main error sources is atmospheric transmitting delay. The influence of neutral refraction delays ranges from a few meters to a few decameters in the radio wave band. It cannot be eliminated absolutely even through corrections of model at present, especially the part of damp atmospheric refraction in case of its strong randomness. Under spherical symmetric atmospheric profiles, the generating function of neutral atmospheric refraction corrections, which related to the complementary error function has been introduced in this paper,. The mathematical expressions of the generating function has also been discussed in detail. Simultaneously, diversified mapping functions are compared in this paper.

关 键 词：中性大气折射延迟 映射函数 母函数 大气折射率 

分 类 号：P228[天文地球—大地测量学与测量工程]