摘要
星载钠荧光多普勒激光雷达可以用来测量全球的中间层顶及低热层区域的大气风场、温度及钠原子数密度等。为了从理论上分析星载钠荧光多普勒激光雷达的可行性,该文依据激光雷达方程,对星载钠荧光多普勒激光雷达的回波信号强度以及大气参数测量精度进行仿真计算。分析结果显示在使用400 km轨道高度,30.0°观测角度,9.0 W激光发射功率,1.0 m接收望远镜口径,2.0 km垂直距离分辨率,30.0 s信号累积时间情况下,可获得0.8 m/s视线风速测量精度,1.5 m/s水平风速测量精度和2.5 K温度测量精度。
The spaceborne sodium Doppler lidar can be developed to measure global wind, temperature and sodium number density in the mesopause and lower thermosphere region. In order to analyze the feasibility of the lidar,simulation calculations about backscattering signals and measurement accuracy have been done in this paper. The analyzed result shows that the line-of-sight wind accuracy, horizontal wind accuracy and temperature accuracy are0.8 m/s, 1.5 m/s and 2.5 K when the height of satellite orbit is 400 km, observational angle is 30.0°, laser power is 9.0 W, receiver diameter is 1.0 m, vertical range resolution is 2.0 km, and signal integrated time is 30.0s.
出处
《雷达学报（中英文）》
CSCD
2015年第1期99-106,共8页
Journal of Radars
基金
中国科学院空间科学预先研究项目(XDA04077400
XDA04072300)资助课题
关键词
激光雷达
中高层大气
多普勒
钠荧光
Lidar
Middle and upper atmosphere
Doppler
Sodium fluorescence
