更新升级的通用大气辐射传输软件CART2(特约)

An upgraded combined atmospheric radiative transfer CART2(Invited)

采用HITRAN2016数据库,研制了新的大气分子吸收系数数据库,应用于更新的第二版通用辐射大气传输软件CART2。增加了光谱分辨率为0.1 cm^-1的CART2P1程序模块。相对于CART1.0,大气分子吸收考虑了更多的分子弱谱线的吸收,扩展了计算波段。计算结果与LBLRTM和MODTRAN5对比表明,CART2能够精确地模拟大气分子的吸收;计算结果与地基实际测量的红外高分辨率太阳光谱吻合的非常好。具备0.1 cm^-1光谱分辨率的CART2计算的大气透过率和环境背景辐射可以分辨出分立的大气分子吸收谱线,能够在中高光谱分辨率的光学工程和有些激光工程的大气传输计算中得到应用。

Using the HITRAN2016 database,a new database of atmospheric molecular absorption coefficients was obtained by recalculating and fitting,which was applied to the upgraded 2nd edition of the Combined Atmospheric Radiative Transfer(CART2).A CART2P1 program module with a spectral resolution of 0.1 cm−1 has been added.Compared to CART 1.0,atmospheric molecular absorption takes into account weaker molecular absorption lines.The comparisons to LBLRTM between the calculated results of MODTRAN5 and CART showed that CART2 can accurately simulate the absorption of atmospheric molecules;the calculated results agree well with the real measured ground-based infrared high-resolution solar spectrum.The atmospheric transmittance and environmental background radiation calculated by CART2 with a finer 0.1 cm−1 spectral resolution can distinguish discrete atmospheric molecular absorption lines,which can be applied to radiative transfer calculations for medium-to-high spectral resolution optical engineering or some laser engineering.