洛伦兹光谱线型的高层大气风场被动探测原理分析

The Principle Analysis of Passive Detection of Upper Atmospheric Wind Field of the Lorentzian Profile

通过探测高层大气中气辉(极光)辐射线的多普勒频移,可以反演出高层大气中的速度、温度和压强等物理量。以高层大气中的极光(原子氧跃迁所辐射的两条主要谱线)为被探测源,对于洛伦兹光谱线型高层大气风场的探测原理和方法进行了研究;给出了基于洛伦兹光谱线型高层大气的速度场、温度场和压力场的分布规律和理论计算公式;采用计算机模拟,描绘了洛伦兹光谱线型风场的误差曲线,表明了洛伦兹光谱线型在高层大气风场探测中占有相当重要的地位。

Through detecting the Doppler shifts of airglow (aurora) in upper atmosphere, the physical quantity such as velocity, temperature and pressure of upper atmosphere is derived. Taking the aurora (two major lines of the emission of the atomic oxygen) in upper atmosphere as the detection source, the detection principle and method of the line based on the Lorentzian profile are researched; the distribution of the velocity, temperature and pressure and their calculation formula are given out based on the Lorentzian profile, using computer imitation, the error curve is described, so it is shown that the Lorentzian profile is very important in the upper atmospheric wind detection.