张捍卫,冒蔚,李彬华,杨磊,铁琼仙

• 1:中国科学院国家天文台云南天文台
• 2:中国科学院国家天文台云南天文台
• 3:昆明理工大学信息工程与自动化学院
• 4:中国科学院国家天文台云南天文台

摘要(Abstract)：

天文大气折射是经典天体测量学和大地测量的一项误差源,大气折射延迟是空间大地测量技术中的一项重要误差源,它们的改正模型都直接与大气折射率和大气分布模型有关。文章简述了大气的垂直分布状况,以及大气折射率(或折射率差)因地和因方位而异的情况,分析了目前只能采用球对称大气分布模型的原因。论证了随测站和随方位而异的天文大气折射和电磁波大气折射延迟实测模型建立的必要性和可能性。实测模型已经包含了测站上空大气实际分布及其非球对称的特性,不必再去寻找或建立随地势而异和随季节而变的大气分布模型,避免了大气分布模型选择不当的影响,从而排除了空间大地测量技术中的一项主要误差源。

关键词(KeyWords)： 大气分布模型;非球对称;大气折射;折射延迟

Abstract:

Keywords:

基金项目(Foundation): 江苏省高校自然科学基金项目(06KJB420111)资助

作者(Author): 张捍卫,冒蔚,李彬华,杨磊,铁琼仙

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