CEDAR/TIMED: Southern-Hemisphere Mesopause Winds, Temperatures, and OH/557.7 nm Airglow Intensities

研究人员将升级秘鲁阿雷基帕光学天文台现有的法布里·珀罗干涉仪（FPI）。该升级将产生一种中流层测量风和温度的能力，具有高精度和频繁的采样率。这些修改还将改进与中间层测量相交叉的热层风、温度和气辉强度的测量。这些观测将有助于研究在地面台站目前采样分布稀少的南半球地区的中层顶动力学的主要特征，如日潮汐风和温度，以及行星波的变化。这些夜间测量，结合Jicamarca雷达对白天风的测量，将有助于改善采样和混叠误差，这些误差是卫星测量由于航天器在当地时间的缓慢进动而造成的。这一升级也将使研究由于地形波效应而可能产生的风、温度和羟基气辉强度的中间层小尺度梯度成为可能。这项工作还包括升级阿雷基帕的成像相机，包括采购和安装宽带过滤器，以便对夜间羟基强度的变化进行成像观察。阿雷基帕的观测将支持CEDAR/TIMED的科学目标。雪松，代表大气区域的耦合、能量学和动力学，是一个将理论建模与地面测量相结合来研究高层大气和电离层的全球变化项目。TIMED，即热层、电离层、中间层能量学和动力学，是美国宇航局研究大气类似区域的卫星项目。联合CEDAR/TIMED计划旨在协调地基和天基观测，以更好地了解低层热层和电离层的物理过程。

ATM9872807The investigators will upgrade an existing Fabry Perot Interferometer (FPI) at the Arequipa Optical Observatory in Peru. The upgrade will produce a capability for mesopause measurements of winds and temperatures with high accuracy and frequent sampling rates. The modifications will also improve the measurements of thermospheric winds, temperatures, and airglow intensities interleaved with the mesosphere measurements. These observations will contribute to the study of major features of mesopause dynamics such as the diurnal tidal winds and temperatures, and planetary wave variations in a region of the Southern Hemisphere where the current samping distribution by ground-based stations is sparse. These nighttime measurements, combined with Jicamarca Radar measurements of daytime winds, will help ameliorate the sampling and aliasing errors that satellite measurements suffer due to the slow precession of the spacecraft in local time. The upgrade will also make possible the study of mesopause small-scale gradients in wind, temperature, and hydroxyl airglow intensities that may arise from orographic wave effects. Also included in the effort is an upgrade in an imaging camera at Arequipa, involving the procurement and installation of a broadband filter to make possible the imaging observations of nocturnal variations of hydroxyl intensities. The Arequipa observations will support CEDAR/TIMED science goals. CEDAR, which stands for Coupling, Energetics, and Dynamics of Atmospheric Regions, is a global change program that combines theoretical modeling with ground-based measurements to study the upper atmosphere and ionosphere. TIMED, for Thermosphere, Ionosphere, Mesosphere Energetics and Dynamics, is a NASA satellite program to study similar regions of the atmosphere. The joint CEDAR/TIMED program aims to coordinate ground-based and space-based observations to achieve better understanding of physical processes in the lower thermosphere and ionosphere.