CEDAR: Ground Based Multifrequency Observations of the Thermosphere and Exosphere

所提议的工作将是一个观测计划，旨在描述上层热层和外逸层的条件及其时间变异性。其基本目标是测量地球大气层上层的所有重要组成和动态参数。PI将建立技术来确定F区峰值以下和上方的热层风，原子氢的逸出通量及其热和非热分配，氢和氦的速度分布，以及光离子的独立输运。除了推动观测和理论对高层大气过程的统一描述外，该项目更广泛的目标是提高对行星大气演化的理解。

The proposed work will be an observational program designed to characterize upper thermospheric and exospheric conditions and their temporal variability. The fundamental objective is to measure all important composition and dynamic parameters in the upper reaches of the earth's atmosphere. The PI will establish techniques to determine thermospheric winds below and above the F- region peak, the escape flux of atomic hydrogen and its thermal and non-thermal partitioning, the velocity distributions of hydrogen and helium, and the independent transport of light ions. The project's broader objective, besides driving observation and theory to a unified description of upper atmospheric processes, is to improve understanding of the evolution of planetary atmospheres.