摘要
建立了一套具有自主知识产权的红外大气透过率模式(IATM),光谱分辨率为1 cm-1,可较快速地计算空间任意两点的红外大气光谱透过率。大气分子吸收计算是采用基于精确的LBLRTM逐线积分算法而提出的一种非线性拟合算法,结合了最新的HITRAN2004数据库中的分子吸收线参数,除了保留MODTRAN中的几种气溶胶衰减的计算模式外,还增加了一种根据实测尺度谱分布和气溶胶消光高度分布的计算模式,并嵌入了我国典型地区的逐月平均的大气模式。文中对软件作了详细介绍,并验证了计算精度、速度和可靠性。该软件的研制有利于提高我国区域内应用场景红外大气透过率计算的精度,对于红外系统的设计和性能评估也具有参考价值。
A set of infrared atmospheric transmittance model（IATM） with self-determination property right of knowledge was developed with a spectral resolution of 1 cm-1.It could be used to calculate fast spatial infrared atmosphere transmittance.A non-linear fitting algorithm based on LBLRTM line-by-line integral arithmetic was used to calculate the absorption of atmospheric molecules,which combined newly molecule absorbing line parameters of HITRAN2004 database.An aerosol computation model based on measured size distribution and height distribution of aerosols was added to calculate aerosol extinction,except reserving the aerosol extinction models in MODTRAN.The monthly-averaged atmosphere models in typical regions of China were embedded.The calculation precision of this software is higher than MODTRAN because of these characteristics.The software was introduced in details and its precision,calculation speed and reliability were tested.The development of IATM is beneficial to enhancing the calculation precision of infrared atmospheric transmittance in region of China.It has reference value for the design of infrared system and the performance evaluation.
出处
《红外与激光工程》
EI
CSCD
北大核心
2011年第5期811-816,共6页
Infrared and Laser Engineering
基金
国家自然科学基金(61077081)
中国科学院合肥物质科学研究院青年人才基金和装备预研基金
