First measurements of the two‐dimensional horizontal wave number spectrum from CCD images of the nightglow
First measurements of the two‐dimensional horizontal wave number spectrum from CCD images of the nightglow
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首次测量夜光 CCD 图像的二维水平波数谱
DOI：
10.1029/94ja00584
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发表时间：
1994
影响因子：
--
通讯作者：
M. Ross
中科院分区：
文献类型：
--
作者：
J. Hecht;R. Walterscheid;M. Ross
一个窄波段CCD相机，建立在航空航天，已被用来获得图像的OH Meinel（6，2）波段和O2大气（0，1）波段夜光。在90公里的高度（夜光的标称高度）上，相机的视场约为100 × 100公里。它示出了如何傅立叶技术可以应用于这些数据，以最佳地平滑的图像，以确定单色波的存在，并获得一维和，第一次，二维水平波数谱的重力波通过发射层。光谱的两种测量都在一定程度上依赖于一种利用Krassovsky η比的技术。这些技术被应用到样本数据从1989年5月9日，在阿雷西博倡议的大气动力学（AIDA）运动在波多黎各，并从最近的合作观测夜光（CORN）运动在伊利诺伊州。虽然未来的论文将更详细地描述这些数据，但与Gardner等人（1993）和Gardner（1994）提出的二维水平波数谱的最新模型进行了简要比较。
A narrow wavelength band CCD camera, built at Aerospace, has been used to obtain images of the OH Meinel (6,2) band and the O2 atmospheric (0,1) band nightglow. The field of view of the camera is approximately 100 by 100 km at an altitude of 90 km, the nominal height of the nightglow. It is shown how Fourier techniques can be applied to these data to optimally smooth the images, to identify the presence of monochromatic waves, and to obtain both the one-dimensional and, for the first time, the two-dimensional horizontal wave number spectrum of gravity waves passing through the emission layers. Both measures of the spectrum depend, to a certain extent, on a technique which makes use of Krassovsky's η ratio. These techniques are applied to sample data taken from May 9, 1989, during the Arecibo Initiative in Dynamics of the Atmosphere (AIDA) campaign in Puerto Rico, and from the recent Collaborative Observations Regarding the Nightglow (CORN) campaign in Illinois. While future papers will describe these data in more detail, a brief comparison is made with recent models of the two-dimensional horizontal wave number spectra presented by Gardner et al. (1993) and Gardner (1994).