超光谱技术是高精度反演大气二氧化碳浓度的基础,针对超光谱技术的特点和大气二氧化碳浓度反演精度的 要求,在探索大气二氧化碳的吸收特性后,选择了一个适合二氧化碳浓度探测的波段进行研究。根据反演原 理和目前所使用的反演方法,利用前向模型LBLRTM着重分析如下四个敏感因素对反演精度的影响: 光谱分辨率、海拔高度、二氧化碳初始浓度和地表反照率。研究结果表明,在大气二氧化碳浓度的反演 过程中这些因素对精度的提高存在一定的影响。

Hyperspectral technology is the base for CO retrieval with high accuracy. With the characteristics of hyperspectral technology and the requirement of accuracy of atmospheric column CO retrieval, after absorption features analysis of atmospheric CO, an absorption band appropriate for research is selected. On the basis of retrieval principle and retrieval method, effects of spectral resolution, terrain height, initial value of CO column and surface albedo on retrieval accuracy are investigated using forward model LBLRTM. The result demonstrates that in the process of CO retrieval thoughtful considerations are desired for sensitive factors above-mentioned so as to improve the accuracy.