CEDAR: Studies of Large-and Small-Scale Dynamics in the Mesosphere and Lower Thermosphere Radar Using the Hawaii MF Radar

ATM 9813774研究人员将继续使用夏威夷考艾岛的中频（MF）雷达测量中层风。 这些数据将用于研究赤道和亚热带纬度波浪和平均风的年际、季节和短期变化。 中频雷达技术非常适合于连续测量平均波、潮汐波和行星波结构，但它也被证明在重力波调制、季节和短期变化、源敏感性和中间层高度传播特性的统计和机理研究中很有价值。 具体的科学目标包括1）纬向平均环流的定义，2）潮汐结构和变化的更完整的定义，3）更好地了解行星波结构，以及4）重力波传播，源响应和过滤的研究。 这项工作需要对夏威夷雷达进行升级，包括一个新的12位接收机系统和改进的分析软件。 当与圣诞岛、拉罗通加和其他纬度的其他经改进的系统相结合时，这些数据将大大有助于了解中层和低热层动力学及其对全球大气结构的影响。

ATM 9813774The investigators will continue measurements of mesospheric winds using a medium frequency (MF) radar on Kauai, Hawaii. The data will be used to study the interannual, seasonal, and short-term variability of the waves and mean winds at equatorial and subtropical latitudes. The MF radar technique is ideally suited for continuous measurements of the mean, tidal, and planetary wave structures, but it has also proven valuable in statistical and mechanistic studies of gravity wave modulation, seasonal and short-term variability, source sensitivity, and propagation character at mesospheric altitudes. Specific science objectives include 1) definition of the zonal mean circulation, 2) a more complete definition of the structure and variability of tides, 3) a better understanding of planetary wave structures, and 4) studies of gravity wave propagation, source responses, and filtering. The effort requires an upgrade to the Hawaii radar consisting of a new 12-bit receiver system and improved analysis software. When combined with other comparably upgraded systems at Christmas Island, Rarotonga, and other latitudes, the data will contribute significantly to understanding of mesosphere and lower thermosphere dynamics and its implications for global atmospheric structure