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

CEDAR/TIMED：南半球中层顶风、温度和 OH/557.7 nm 气辉强度

• 批准号: 9872807
• 负责人: John Meriwether
• 金额: $ 2.98万
• 依托单位: Clemson University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-03-01 至 2001-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9872807&HistoricalAwards=false
• 关键词: CEDAR; TIMED; Southern; Hemisphere; Mesopause

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.

ATM9872807调查人员将在秘鲁的Arequipa光学天文台升级现有的Fabry Perot干涉仪（FPI）。 升级将产生高精度和频繁采样率的风和温度测量的能力。 这些修改还将改善热圈风，温度和气流强度与中层测量相结合的测量。 这些观察结果将有助于研究中间动力学的主要特征，例如昼夜潮汐风和温度，以及在南半球的一个地区的行星波变化，在该区域中，稀疏地面台站狭窄的趋势分布很少。 这些夜间测量以及白天风的jicamarca雷达测量结果将有助于缓解卫星测量值在当地时间内较慢的进液，使卫星测量遭受的采样和混溶性误差。 升级还可以使对中间小尺度梯度在风，温度和羟基空气流强度的研究中成为可能，这些梯度可能是由地形波效应引起的。 这项工作还包括在Arequipa的成像摄像头中进行升级，涉及宽带滤清器的采购和安装，以使羟基强度的夜间变化的成像观察可能。 Arequipa的观察将支持Cedar/定时科学目标。 雪松代表大气区域的耦合，能量和动力学，是一个全球变化程序，将理论建模与基于地面的测量结果结合在一起，以研究上层大气层和电离层。 对于热层，电离层，中层能量和动力学，时间是NASA卫星计划，用于研究大气的相似区域。 联合雪松/定时计划旨在协调基于地面和空间的观测值，以更好地理解较低热层和电离层中的物理过程。