大气与环境光学学报 ›› 2021, Vol. 16 ›› Issue (3): 256-268.

• “高分五号卫星大气数据反演”专辑 • 上一篇    下一篇

基于高分五号DPC 氧气A 吸收波段的云顶压强反演

乔 瑞1;2, 伽丽丽1∗, 许 华1, 李正强1;2∗, 朱思峰1, 谢一凇1, 洪 津3, 代海山4, 麻金继5   

  1. 1 中国科学院空天信息创新研究院, 国家环境保护卫星遥感重点实验室, 北京 100101; 2 中国科学院大学, 北京 100049; 3 中国科学院合肥物质科学研究院安徽光学精密机械研究所, 中国科学院通用光学定标与表征技术重点实验室, 安徽 合肥 230031; 4 上海卫星工程研究所, 上海 201109; 5 安徽师范大学地理与旅游学院, 安徽 芜湖 241000
  • 收稿日期:2021-01-11 修回日期:2021-02-22 出版日期:2021-05-28 发布日期:2021-05-28
  • 通讯作者: E-mail: qiell@aircas.ac.cn; lizq@radi.ac.cn E-mail:lizq@radi.ac.cn
  • 作者简介:乔 瑞 (1995 - ), 山西大同人, 硕士研究生, 主要从事偏振遥感在轨定标方面的研究。 E-mail: qiaorui1230@outlook.com
  • 基金资助:
    Supported by National Natural Science Foundation of China (国家自然科学基金, 41671364), National Outstanding Youth Foundation of China (国家杰出青年科学基金, 41925019), Hainan Provincial Natural Science Foundation of China (海南省自然科学基金项目, 418QN302)

Retrieval of Cloud Top Pressure in Oxygen A-band Based on Data From DPC Onboard GF-5 Satellite

QIAO Rui1;2, QIE Lili1∗, XU Hua1, LI Zhengqiang1;2∗, ZHU Sifeng1, XIE Yisong1, HONG Jin3, DAI Haishan4, MA Jinji5   

  1. 1 State Environmental Protection Key Laboratory of Satellite Remote Sensing, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100101, China; 2 University of Chinese Academy of Sciences, Beijing 100049, China; 3 Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China; 4 Shanghai Institute of Satellite Engineering, Shanghai 201109, China; 5 School of Geography and Tourism, Anhui Normal University, Wuhu 241000, China
  • Received:2021-01-11 Revised:2021-02-22 Published:2021-05-28 Online:2021-05-28

摘要: 云顶压强可用于估计云高, 对气象观测和云特性研究等具有重要的作用。基于高分五号卫星搭载的多角度偏 振探测仪 (DPC) 在氧气 A 吸收带设置的 763 nm 和 765 nm 两个波段进行了云顶压强反演方法的研究。首先, 通过辐 射传输模拟和多项式拟合得到了大气压强的计算公式, 并对拟合公式进行了误差分析和校正。然后, 分析了气溶胶、 大气廓线等因素对云顶压强反演结果的影响, 并进一步利用晴空地表对反演方法进行了稳定性测试和原理性验证。 测试结果表明氧气 A 带方法稳定性较好, 可以适用于不同天气状况和观测角度; 验证结果表明 DPC 反演压强与 DEM 估算压强有很好的一致性, 地表压强的平均偏差约为 47.6 hPa。最后, 将 DPC 反演的云顶压强与 MODIS 云顶压强产 品 (MYD06) 进行了对比, 结果表明两颗卫星的云顶压强观测结果具有较好的空间一致性。

关键词: 云顶压强, 差分吸收光谱技术, 氧气 A 吸收带, 反演

Abstract: Cloud top pressure can be used to estimate cloud height, which is important for meteorological observation and cloud characteristics research. Based on 763 nm and 765 nm bands (in oxygen A-band) of the Directional Polarimetric Camera (DPC) onboard GF-5 satellite, a cloud top pressure retrieval method is studied. First, the calculation formula of atmospheric pressure is obtained by using radiative transfer simulation and polynomial fitting, and the fitting error of the formula is analyzed and corrected. Then, the influence of aerosol, atmosphere profile and other factors on the cloud top retrieval is analyzed, and the stability test and principle verification of the retrieval method are further carried out by using clear-sky surface. The stability test results show that the oxygen A-band retrieval method is stable and can be applied to different weather conditions and view angles, and the principle verification results show that the DPC retrieved pressure is in good correlation with the DEM estimated pressure, with the average deviation of surface pressure of 47.6 hPa. Finally, the retrieved DPC cloud top pressure is compared with the MODIS cloud top pressure product (MYD06), and it is shown that cloud top pressure observation results of the two satellites are in good agreement.

Key words: cloud top pressure, differential optical absorption spectroscopy, oxygen A-band, retrieval

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