不同版本HITRAN数据库中红外波段上行传输透过率的计算

为比较不同版本数据库对透过率计算精度的影响，利用逐线积分辐射传输模式，对比分析了HITRAN 2k、HITRAN 04和HITRAN 08数据库在中红外波段（2~12 m）、四种初始高度（1、10、15、20 km）上行大气传输分子透过率的差异。结果表明，在4种初始高度上，04版本的平均绝对偏差均比2k版本小，而且在某些波段上对应的绝对偏差均较大:在1 cm-1分辨率时，仅考虑CO2吸收，04、2k版本对应的最大绝对偏差为0.338（2.696 m）和0.394（2.749 m）；在0.1 cm-1分辨率时，考虑7种分子吸收，04、2k版本对应的最大绝对偏差达到了0.95（4.191 m）和0.936（3.568 m）。在计算中红外波段不同初始高度上行大气传输透过率时，采用旧版本的HITRAN数据库在某些波段会产生相当大的误差。

Effect of changes of HITRAN database on transmittance calculation in mid-infrared region along vertical uplink

The mid-infrared atmospheric transmittance and the absolute deviation were calculated with three different HITRAN databases using LBL software. Results show that the average absolute deviation of HITRAN2k and HITRAN04 decreases with the increase of initial height, the absolute deviation of HITRAN2k and HITRAN04 increases as the resolution increases. The average absolute deviation of HITRAN04 was less than the HITRAN2k at the four initial height. For example, the maximum absolute deviation of HITRAN04 and HITRAN2k was 0.338 and 0.394 with 1 cm-1 spectral resolution only considering the absorption of CO2. The maximum absolute deviation of HITRAN04 and HITRAN2k was 0.950 and 0.936 with 0.1 cm-1 spectral resolution considering the absorption of all kinds molecules. The deviation caused by old versions of the database should be considered for calculating infrared atmospheric transmittance. The difference caused by different versions of the database and spectral resolution should be considered for calculating infrared atmospheric transmittance.