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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Deducing Non-Migrating Diurnal Tides in the Middle Thermosphere With GOLD Observations of the Earth's far Ultraviolet Dayglow From Geostationary Orbit
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Deducing Non-Migrating Diurnal Tides in the Middle Thermosphere With GOLD Observations of the Earth's far Ultraviolet Dayglow From Geostationary Orbit

机译：推导不迁徙的全日潮在中间热电离层与黄金的观测地球的远紫外线Dayglow地球静止轨道

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摘要

The global-scale observations of the limb and disk (GOLD) Mission images middle thermosphere temperature and the vertical column density ratio of oxygen to molecular nitroEgen (∑O/ N_2) using its far ultraviolet imaging spectrographs in geostationary orbit. Since GOLD only measures these quantities during daylight, and only over the ~140° of longitude visible from geostationary orbit, previously developed tidal analysis techniques cannot be applied to the GOLD data set. This paper presents a novel approach that deduces two specified non-migrating diurnal tides using simultaneous measurements of temperaturEe and ∑O/N_2. DE3 (diurnal eastward propagating wave 3) and DE2 (diurnal eastward propagating wave 2) during October 2018 and January 2020 are the focus of this paper. Sensitivity analyses using TIE-GCM simulations reveal that our approach reliably retrieves the true phases, whereas a combination of residual contributions from secondary tides, the restriction in longitude, and random uncertainty can lead to ~50% error in the retrieved amplitudes. Application of our approach to GOLD data during these time periods provides the first observations of non-migrating diurnal tides in measurements taken from geostationary orbit. We identify discrepancies between GOLD observations and TIE-GCM modeling. Retrieved tidal amplitudes from GOLD observations exceed their respective TIEGCM amplitudes by a factor of two in some cases.
机译：全球范围内观察的肢体和磁盘(黄金)任务图片中间热大气层温度和密度比垂直列氧气分子nitroEgen(∑O /甲烷)使用远紫外成像光谱仪地球静止轨道。这些量在白天,只有结束~ 140°的经度可见从地球静止轨道,之前开发的潮汐分析技术不能应用于黄金的数据集。推导出两个指定不迁徙的全日潮使用temperaturEe的同时测量和∑O /甲烷。波3)和德(日东传播波2)在2018年10月和2020年1月本文的重点。使用TIE-GCM仿真揭示了我们方法可靠地获取真正的阶段,而剩余贡献的组合从二次潮汐,限制经度,和随机不确定性可能导致在检索到的振幅~ 50%错误。黄金数据在应用程序的方法这些时期提供了第一个观测的不迁徙的全日潮测量从地球静止轨道。确定黄金观测结果之间的差异和TIE-GCM建模。从黄金观察超过各自的TIEGCM振幅的两倍用例。

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