Sensitivity study for ICON tidal analysis
Sensitivity study for ICON tidal analysis
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DOI：
10.1186/s40645-020-00330-6
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发表时间：
2020-05-22
影响因子：
3.9
通讯作者：
Liu, Guiping
中科院分区：
文献类型：
--
作者：
Cullens, Chihoko Y.;Immel, Thomas J.;Liu, Guiping
可以使用几种不同的干涉测量和光度测量方法来获取中高层大气的特性。从地面和太空可以观测到原子和分子发射的发射形状以及多普勒频移，从而提供温度和整体速度。这些瞬时测量值可以沿着轨道轨迹在连续的时间/位置上进行组合，或者从地面站在连续的世界时/地方时进行组合，以量化识别大气潮汐所需的大气运动和温度。在本报告中，我们探讨了基于空间的风场和温度测量的不同组合如何影响大气潮汐的获取，大气潮汐是行星大气普遍存在的特性。我们探讨了几种基于潮汐强迫大气环流模型、基于经验的发射参考以及基于ICON任务设计的低地球轨道卫星观测几何的情景。这种能力为设计从ICON遥感观测中获取大气潮汐的最佳任务概念提供了必要的工具。在此，它被用于研究数据可用性有限的情景以及总波谱的快速变化对正确潮汐谱获取的影响。像这里所描述的方法可用于未来任务的设计，例如美国国家航空航天局的DYNAMIC任务（美国国家研究委员会，《太阳与空间物理学：技术社会的一门科学》，2013年）。
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).