中高层大气背景红外辐射特性及成像研究  

The Study of Characteristics and Imaging of Infrared Radiation of Middle and Upper Atmosphere Background

作　　者：施杰 史波[1] 金峰[1] 邢世林 缑伟隆 Shi Jie;Shi Bo;Jin Feng;Xing Shilin;Gou Weilong(College of Energy and Power,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,Jiangsu,China)

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《激光与光电子学进展》2024年第8期314-324,共11页Laser & Optoelectronics Progress

摘　　要：以中高层大气背景的红外辐射特性和红外成像为研究目的,建立中高层大气背景探测模型和红外成像模型,分析中光谱分辨率大气辐射传输模式(MODTRAN)在红外波段的适用范围,利用战略高空辐亮度代码(SHARC)仿真分析3~5μm波段不同观测参数下的中高层大气背景红外辐射特性,并建立相关辐射特性数据库,完成中高层大气背景红外辐射场景成像仿真。结果表明:3~5μm和8~12μm波段MODTRAN分别在切点高度50 km和70 km以下具有较好的计算精度;中高层大气背景辐亮度随着切点高度和太阳天顶角的增大而减小,随着观测天顶角的增大而增大;短路径和长路径的辐射特性分别由路径长度和处于低层大气的路径大气参数占主导影响;白天和夜晚的辐亮度分别在36 km和34 km为最大值,在75 km和85 km处为极大值。研究结果可为中高层大气背景红外探测提供理论支持。This study proposes an infrared imaging and detection model to address infrared imaging and radiation characteristics of the middle and upper atmospheric background.The applicability of the medium spectral resolution atmospheric radiation transfer mode(MODTRAN)in the infrared band is analyzed,and the strategic highaltitude radiance code(SHARC)is utilized to simulate and analyze the infrared radiation characteristics of the middle and upper atmospheric background under different observation parameters in the 3‒5µm band.Furthermore,a relevant radiation characteristic database is established to complete imaging simulation for infrared radiation scenes in the middle and upper atmospheric background.The results demonstrate that the MODTRAN in the 3‒5 and 8‒12µm bands has good computational accuracy at tangent heights below 50 and 70 km,respectively;middle and upper atmospheric background radiance decreases with the increase in the tangent height and solar zenith angle,however,this increases with the observed zenith angle increase;short and long path radiation characteristics are primarily influenced by the path length and atmospheric parameters in the lower atmosphere,respectively;the radiance during the day and night reaches its global maximum at 36 and 34 km,respectively,and local maximum at 75 and 85 km.The results provide theoretical support for the infrared detection of middle and upper atmospheric backgrounds.

关 键 词：中高层大气 红外辐射 临边背景 红外成像 数据库 

分 类 号：P407.6[天文地球—大气科学及气象学]