近红外星载风温成像干涉仪的设计和仿真

Design and Simulation of Near-Infrared Wind Temperature Imaging Interferometer Based on Satellite

临近空间风温遥感技术是研究大气动力学、热力学特性的重要手段,也是提高空间天气数值预报准确性的必要途径。针对临近空间大气风温遥感探测需求,通过分析临近空间风场和温度的探测原理和方法,并比较现有星载被动风温探测方式,提出了一种基于视场展宽迈克尔逊干涉仪的近红外星载风温成像干涉仪,其工作波长为O2分子在1.27μm的谱线,探测范围覆盖整个临近空间。论述了系统工作原理和设计过程,其中,重点阐述了兼具视场展宽、色差矫正、温度补偿功能的Michelson干涉仪和用于对O2分子谱线鉴频的F-P干涉仪的设计,并进行了模拟仿真实验。仿真结果表明风速测量误差为18.98%,可满足临近空间大气风场和温度场探测要求。

Near-space wind temperature remote sensing technology is an important method to study the dynamics and thermodynamic characteristics of the atmosphere,and a necessary way to improve the accuracy of space weather numerical prediction.According to the remote sensing detection requirements of atmospheric wind temperature in the near space,by analyzing the detection principles and methods of the near space wind field and temperature,and comparing the existing spaceborne passive wind temperature detection methods,a near-infrared spaceborne wind temperature imaging interferometer based on the field-stretched Michelson interferometer is proposed.Its working wavelength is the spectral line of O2 molecules at 1.27μm,and the detection range covers the entire adjacent space.The working principle and design process of the system are discussed in this paper.The design of Michelson interferometer with field broadening,chromatic aberration correction,and temperature compensation functions and the F-P for frequency discrimination of O2 molecular lines are mainly discussed,and simulation experiments are performed.The simulation results show that the wind speed measurement error is 18.98%,which can meet the detection requirements of the atmospheric wind field and temperature field in the adjacent space.