XIE Yifei,DENG Xiaobo,HUANG Qihong,et al.Radiation Sensitivity of Atmospheric Oxygen Absorption Line based on Occultation Observations[J].Journal of Chengdu University of Information Technology,2025,40(04):472-477.[doi:10.16836/j.cnki.jcuit.2025.04.010]
基于掩星观测的大气氧气吸收线辐射敏感性研究
- Title:
- Radiation Sensitivity of Atmospheric Oxygen Absorption Line based on Occultation Observations
- 文章编号:
- 2096-1618(2025)04-0472-06
- 分类号:
- TN967.1
- 文献标志码:
- A
- 摘要:
- 掩星观测具有垂直分辨率高、稳定性好的特点。通过利用氧气A、B带具有恒定垂直混合比这一特征,可应用于大气温湿度、密度廓线的精确反演。采用SCIATRAN模型进行10～50 km高度氧气吸收线的直射辐射能量计算,构建太阳直射光高光谱探测正演模型。模拟不同仪器响应函数、不同大气标准下及不同大气成分和气溶胶对氧气A、B带透过率的影响,分析不同条件下氧气辐射透过率的规律。研究结果表明:不同仪器响应函数会对氧气吸收线峰值处波长产生±7%的频谱漂移影响; 切高越高,气温越低,则氧气吸收线辐射透过率越高。并通过实验模拟数据和产品实测数据的对比,验证了SCIATRAN辐射正演模型的可靠性和有效性。
- Abstract:
- Occultation observations have the characteristics of high vertical resolution and good stability.By utilizing the constant vertical mixing ratio of oxygen A and B bands,they can be applied to the accurate retrieval of atmospheric temperature,humidity,and density profiles.In this study,the SCIATRAN model was used to calculate the direct solar radiation energy of oxygen absorption lines in the altitude range of 10-50 km,and a solar direct spectral detection forward model was constructed.The effects of different instrument response functions,different atmospheric standards,and different atmospheric components and aerosols on the transmittance of oxygen A and B bands were simulated,and the laws of oxygen radiation transmittance under different conditions were analyzed.The results show that different instrument response functions can cause a spectral shift of ±7% at the peak wavelength of oxygen absorption lines; the higher the tangent height,the higher the transmittance of oxygen absorption lines; and the lower the temperature,the higher the transmittance of oxygen absorption lines.This study also verified the reliability and effectiveness of the SCIATRAN radiation forward model through the comparison of experimental simulation data and product measurement data.
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备注/Memo
收稿日期:2024-01-30