大气与环境光学学报, 2017, 12 (5): 332, 网络出版: 2017-10-17
MODTRAN5分子吸收模式的计算精度数值评估
Numerical Evaluation of Precision of Atmospheric Molecular Absorption Calculated by MODTRAN5 Band Model
摘要
大气辐射传输软件MODTRAN5较以前版本光谱分辨率从2 cm-1提高到0.2 cm-1,为了检验MODTRAN5分子吸收的计算精度,用精确的逐线积分法LBLRTM做 参考,模拟比较了MODTRAN5计算的大气光谱透过率。结果表明: MODTRAN5软件计算的大气透过率与LBLRTM计算结果的均方根误差总体上不超过0.02,但在有 些波段最大误差可达0.03以上,如二氧化碳4.3 μm吸收带,误差值为0.0377。
Abstract
The MODTRAN5 radiation transport model is advanced over earlier versions of the MODTRAN model. The spectral resolution has been improved from 2 cm-1 to 0.2 cm-1. To validate the precision of atmospheric molecular absorption calculated by MODTRAN5 band model, the atmospheric molecular absorption spectral transmittance is calculated by using the accurate line-by-line atmospheric transfer model (LBLRTM), then as a reference to the results of MODTRAN5. The results show that the MODTRAN5 coincides with LBLRTM at most cases, and the root-mean-square error (RMSE) of atmospheric spectral transmittance between the MODTRAN5 and LBLRTM is almost below 0.02. But at some spectral region, the difference can be over 0.03. As the largest difference occurs at 4.3 μm wavelength which is the border of strong absorption band of carbon dioxide, the RMSE is 0.0377.
马力, 戴聪明, 唐超礼, 苗锡奎, 魏合理. MODTRAN5分子吸收模式的计算精度数值评估[J]. 大气与环境光学学报, 2017, 12(5): 332. MA Li, DAI Congming, TANG Chaoli, MIAO Xikui, WEI Heli. Numerical Evaluation of Precision of Atmospheric Molecular Absorption Calculated by MODTRAN5 Band Model[J]. Journal of Atmospheric and Environmental Optics, 2017, 12(5): 332.