Validation of ICON‐MIGHTI Thermospheric Wind Observations: 1. Nighttime Red‐Line Ground‐Based Fabry‐Perot Interferometers

Validation of ICON‐MIGHTI Thermospheric Wind Observations: 1. Nighttime Red‐Line Ground‐Based Fabry‐Perot Interferometers
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ICON–MIGHTI 热层风观测的验证: 1. 夜间红色–线地面–基于法布里–珀罗干涉仪

DOI:
10.1029/2020ja028726
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发表时间:
2021
期刊:
Journal of Geophysical Research: Space Physics
影响因子:
--
通讯作者:
Immel, Thomas J.
Immel, Thomas J.
中科院分区:
--
文献类型:
--
作者:
Makela, Jonathan J.;Baughman, Matthew;Navarro, Luis A.;Harding, Brian J.;Englert, Christoph. R.;Harlander, John M.;Marr, Kenneth D.;Benkhaldoun, Zouhair;Kaab, Mohamed;Immel, Thomas J.

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将两个地面法布里-珀罗干涉仪对夜间热层风的观测结果与美国国家航空航天局电离层连接探测器上的迈克尔逊干涉仪全球高分辨率热层成像 (MIGHTI) 的 2.1 级和 2.2 级数据产品进行比较,以评估和验证用于生成 MIGHTI 观测到的中性热层风测量结果的方法。我们发现,在空间和时间上大致一致的观测结果之间总体上具有良好的一致性,其幅度平均差异小于 11 m/s,标准偏差约为 20-35 m/s。这些结果表明,不同仪器使用的零风参考的独立计算不包含强烈的系统或物理偏差,即使观测是在太阳极小条件下测量的气辉强度较弱时获得的。我们认为,两种仪器类型之间估计风量的细微差异可归因于气辉和热层风场的梯度以及仪器使用的不同观察几何形状。
Observations of the nighttime thermospheric wind from two ground‐based Fabry‐Perot Interferometers are compared to the level 2.1 and 2.2 data products from the Michelson Interferometer Global High‐resolution Thermospheric Imaging (MIGHTI) onboard National Aeronautics and Space Administration's Ionospheric Connection Explorer to assess and validate the methodology used to generate measurements of neutral thermospheric winds observed by MIGHTI. We find generally good agreement between observations approximately coincident in space and time with mean differences less than 11 m/s in magnitude and standard deviations of about 20–35 m/s. These results indicate that the independent calculations of the zero‐wind reference used by the different instruments do not contain strong systematic or physical biases, even though the observations were acquired during solar minimum conditions when the measured airglow intensity is weak. We argue that the slight differences in the estimated wind quantities between the two instrument types can be attributed to gradients in the airglow and thermospheric wind fields and the differing viewing geometries used by the instruments.
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