CEDAR: Identification of Planetary Waves and Migrating as well as Nonmigrating Tidal Oscillations at Latitudes Using a Longitudinal Chain of Airglow Optical Instruments

研究人员观察波浪驱动的波动对极地中层大气和低热层的成分和热力学的影响，这可能反映了潮汐波、行星波或重力波的影响。 他们区分重力波驱动的扰动，由于潮汐和行星波的周期性和持久性观察到的波动调制高层大气量。 然而，他们是从位于不同极地的四个极地站进行协调测量，因为他们无法在一个极地站区分迁移潮汐和非迁移潮汐。 在调查MLT扰动时，他们正在协调这些极地站点的气辉观测和潮汐和行星波对气辉亮度和温度影响的详细模型计算。 从雷达和激光雷达收集补充数据，在前两者可用时与气辉测量相结合，提供不同波型的垂直结构。 这项研究为今后支持TIMED任务奠定了基础。

Investigators observe effects wave-driven fluctuations on composition and thermodynamics of the polar middle atmosphere and the lower thermosphere, which may reflect effects of tidal, planetary or gravity waves. They differentiate gravity-wave driven disturbances from those due to tides and planetary waves by periodicity and persistence of observed wave-like modulations of upper atmospheric quantities. However, they are conducting coordinated measurements from four polar stations located at different longitudes, since they cannot differentiate migrating tides from non-migrating tides at a single polar station. In investigating MLT disturbances, they are coordinating these polar sites airglow observations and detailed model calculations of tidal and planetary wave effects on airglow brightness and temperature. Supplementary data is collected from radars and lidars, integrated with airglow measurements whenever the former two are available, providing the vertical structure of different wave modes. This research lays groundwork for future support of TIMED missions.