星载FPI探测低热层温度的研究

Research on Spaceborne FPI Detection of Lower Thermospheric Temperature

80-350km高度区域的大气温度与风场探测研究对于认识全球性空间动力学和日地耦合机制具有重要科学意义．法布里-珀罗干涉仪（FPI）能够通过分析接收光的干涉环反演计算出一定高度大气层的风场和温度．近年来，中国利用多种地基探测设备对中高层大气进行了观测研究，对于温度反演和星载探测技术的研究开始起步．本文基于系统传输函数和发射谱线函数的卷积，讨论了利用FPI探测高空大气温度反演计算的原理；分析了星载FPI探测的方法，根据星载FPI探测与地基探测的不同点，仿真了星载探测干涉图；结合中国观测技术现况及空间探测需要，讨论了发展星载空间环境探测仪的可行性．

Research on the atmosphere of 80-350 km height is of great interest for understanding global aerodynamics and solar-terrestrial coupling. A Fabry-Perot Interferometer （FPI） is a multiple beam interferometer which makes it possible to obtain information on thermospheric airglow from its interference fringes. Recently, various ground-based instruments have been built in China for observing the upper atmosphere, but technology for the temperature inversion and spaceborne de- tection is still in the initial stage. Based on the convolution of system MTF and function of emission spectra, this paper discussed the detecting principle of inversion calculation on upper atmospheric wind and temperature. It also expatiated the method of spaceborne FPI detection, and simulated the interference pattern of spaceborne FPI. Finally, the feasibility of developing China＇s spaceborne detector for space environment detection is discussed, on the basis of development and strategic needs of space exploration.