Retrieval of the properties of the middle and upper atmosphere can be performed using several different interferometric and photometric methods. The emission-shape and Doppler shift of both atomic and molecular emissions can be observed from the ground and space to provide temperature and bulk velocity. These instantaneous measurements can be combined over successive times/locations along an orbit track, or successive universal/local times from a ground station to quantify the motion and temperature of the atmosphere needed to identify atmospheric tides. In this report, we explore how different combinations of space-based wind and temperature measurements affect the retrieval of atmospheric tides, a ubiquitous property of planetary atmospheres. We explore several scenarios informed by the use of a tidally forced atmospheric circulation model, an empirically based emissions reference, and a low-earth orbit satellite observation geometry based on the ICON mission design. This capability provides a necessary tool for design of an optimal mission concept for retrieval of atmospheric tides from ICON remote-sensing observations. Here it is used to investigate scenarios of limited data availability and the effects of rapid changes in the total wave spectrum on the retrieval of the correct tidal spectrum. An approach such as that described here could be used in the design of future missions, such as the NASA DYNAMIC mission (National Research Council, Solar and space physics: a science for a technological society, 2013).

中文翻译：

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ICON 潮汐分析的敏感性研究。


可以使用几种不同的干涉测量和光度测量方法来检索中层和高层大气的特性。可以从地面和太空观察原子和分子发射的发射形状和多普勒频移，以提供温度和体积速度。这些瞬时测量结果可以在沿轨道的连续时间/位置或来自地面站的连续通用/本地时间上进行组合，以量化识别大气潮汐所需的大气运动和温度。在本报告中，我们探讨了天基风和温度测量的不同组合如何影响大气潮汐的检索，大气潮汐是行星大气中普遍存在的特性。我们通过使用潮汐强迫大气环流模型、基于经验的排放参考以及基于 ICON 任务设计的低地球轨道卫星观测几何来探索几种情景。该功能为设计最佳任务概念提供了必要的工具，以从 ICON 遥感观测中检索大气潮汐。在这里，它用于研究数据可用性有限的情况以及总波浪频谱的快速变化对正确潮汐频谱检索的影响。此处描述的方法可用于设计未来的任务，例如 NASA DYNAMIC 任务（国家研究委员会，太阳和空间物理学：技术社会的科学，2013 年）。