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CEDAR: High Spectral Resolution Lidar for Profiling Mesopause Temperature, Wind, and Sodium Density

CEDAR：高光谱分辨率激光雷达，用于分析中层顶温度、风和钠密度

基本信息

批准号：
9101824
负责人：
Chiao-Yao She
金额：
$ 30万
依托单位：
Colorado State University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1991
资助国家：
美国
起止时间：
1991-08-01 至 1995-01-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9101824&HistoricalAwards=false
关键词：
CEDAR Spectral Resolution Lidar Profiling

项目摘要

This grant supports the continued study of the physics of Na temperature lidar and its applications. It is expected that with improved technology the temperature error due to laser frequency uncertainty can be reduced to the level of 0.1 K, and that the lidar can also be used to measure radial wind velocity to an accuracy of 1 m/s. Since very little is known about the temperature structure in the mesopause region, measurements of temperature and Doppler-wind) profiles with high resolution are timely and of geophysical interest. A three year-research program will be carried out to further investigate and employ the physics of high-spectral-resolution Na fluorescence lidar, and to elucidate the geophysics in the mesospause region by performing observations regularly and over an extended period with this unique lidar system. In particular, the PI will (1) conduct laboratory and theoretical studies of saturated Doppler-free fluorescence spectroscopy in Na vapor for the purpose of improving measurement accuracy, (2) modify the existing lidar for simultaneous temperature and Doppler-wind measurements, (3) establish nighttime climatology of the mesopause region over Fort Collins, CO and (4) analyze, organize and interpret these unique lidar data in terms of correlated mesospheric response to gravity wave induced perturbations. *** //

该基金支持继续研究钠的物理学温度激光雷达及其应用预计随着改进技术，消除激光频率引起的温度误差不确定性可以降低到0.1 K的水平，激光雷达还可以用来测量径向风速，精度为1 m/s。由于对这一现象知之甚少，中层顶区域的温度结构，温度和多普勒风）廓线，及时和地球物理的兴趣。为期三年的研究计划将进行进一步调查和雇用高光谱分辨率Na荧光激光雷达的物理学，通过表演来阐明中层顶区域的物理学，定期和长期观察，独特的激光雷达系统具体而言，PI将（1）进行饱和无多普勒的实验室和理论研究钠蒸气中的荧光光谱，提高测量精度，（2）改进现有激光雷达，同时进行温度和多普勒风测量，（3）建立堡垒上空中层顶区域的夜间气候学柯林斯，CO和（4）分析，组织和解释这些独特的激光雷达数据在相关的中间层对重力的响应方面波浪引起的扰动 *** //