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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Modeled Gravity Wave-Like Perturbations in the Brightness of Far Ultraviolet Emissions for the GOLD Mission
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Modeled Gravity Wave-Like Perturbations in the Brightness of Far Ultraviolet Emissions for the GOLD Mission

机译：模拟重力波扰动亮度的远紫外线排放黄金的任务

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摘要

The NASA Global-scale Observations of Limb and Disk (GOLD) mission will study the coupling of the thermosphere with the lower atmosphere through an examination of temperature and composition, allowing the study of atmospheric waves. A key mechanism of energy and momentum transport between atmospheric regions is gravity waves. GOLD is an imaging spectrograph that will measure Earth's airglow emissions (both nightglow and dayglow) in the far ultraviolet range from 132 to 162 nm, including the atomic oxygen doublet at 135.6 nm and molecular nitrogen Lyman-Birge-Hopfield bands. GOLD will be the first instrument to make such measurements from the perspective of a geostationary orbit, which creates unique challenges and opportunities for observing atmospheric waves. Here wemodel the ability of the GOLD imager to detect a gravity wave-like perturbation from the emergent brightness variations using a combination of a general circulation model and a model of the thermospheric airglow in the far ultraviolet. A 10% perturbation in temperature (±59 K at 150 km) and constituent densities is introduced into the vertical columns of the atmosphere, which results in a ±1.5 Rayleigh perturbation to the brightness of both spectral features, with the same wave period as the introduced perturbation. For the expected total signal, particle background counts, and chosen spectral feature, signal-to-noise calculations indicate that integration for several minutes will allow gravity wave perturbations to be observed in brightness perturbations on a single pixel of an image.
机译：美国宇航局的肢体和全球范围内观察磁盘(黄金)任务的耦合研究与低层大气的热大气层的温度和通过一个考试成分,使大气的研究波。大气区域之间的运输是重力波。测量地球的大气光(nightglow排放远紫外范围从和dayglow)132 - 162纳米,包括原子氧紧身上衣为135.6纳米和分子氮Lyman-Birge-Hopfield乐队。第一次作出这样测量工具地球静止轨道的角度来看,创造了独特的挑战和机遇观察大气波。万有引力黄金成像仪检测的能力从紧急波扰动使用组合的亮度变化环流模型的模型在远紫外thermospheric大气光。10%的扰动温度(±59 K 150公里)并引入成分密度大气的垂直列的结果在±1.5瑞利微扰的亮度的光谱特性,相同的波介绍了微扰时期。预计总信号,粒子背景数,选择光谱特性,信噪比计算表明几分钟将允许集成重力波扰动观察到亮度扰动在单个像素的的形象。

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