摘要
提出了一种用Fabry Perot干涉仪 (FPI)的多光束干涉原理和多普勒效应测量上层大气风场的方法 .以上层大气 (80～ 30 0km)中自然形成的气辉 (极光 )为被探测源 ,其两条主要谱线来源于亚稳态原子氧O(1S)和O(1D)跃迁时所形成的两条单线 (波长分别为 557 7nm和 6 30 0nm) .对被探测源谱线为高斯轮廓时风场的速度、温度的测量原理作了论述 ,并与广角迈克耳逊多普勒成像干涉仪 (WAMDII)测量大气风场进行了比较 .结果表明 ,FPI无运动部件 ,从而显示出高稳定度和高分辨率的优点 ,更加适合航空。
Upper atmospheric windfield is measured by use of Fabry Perot multibeam interference and Doppler effect. Airglow (aurora) occuring in the visible region of the upper atmosphere (80～300 km) is as probed source. Two major lines are originated from the metastable O( 1S) and O( 1D) levels at 557 7 nm and 630 0 nm. Upper atmospheric windfild′s velocity and temperature are described when probed source lines known as Guassian in shape. The method disoribed is compared with the wide angle Michelson Doppler imaging interferometer (WAMDII). The result indicates that Fabry Perot interferometer′s exploration for windfield has no moving parts, therefore it shows advantages of static, high resolution and is more suitable for aviation, speceflight and field circumstance′s exploration.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2000年第4期97-99,共3页
Journal of Xi'an Jiaotong University
基金
国防科技预研基金资助项目!(97J2 0 .7.3.ZK1 80 3)
关键词
风场
速度
温度
Fabry-Perot干涉仪
上层大气
FPI
Doppler effect
imaging spectroscopy
velocity and temperature of upper atmospheric wind field
