任华忠 研究员

北京大学地球与空间科学学院遥感与地理信息系统研究所研究员,长聘副教授,博士生导师。主要研究方向:热红外遥感,开展多源热红外遥感数据的地表温度与发射率反演方法研究、地表温度角度归一化、红外遥感影像目标识别、热异常监测等研究工作。国家自然科学基金委优秀青年基金获得者;获高校GIS创新人物奖(2022)、李小文遥感科学青年奖(2019)、北京市科技新星人才计划(2017)、科技部国家遥感中心遥感青年科技人才创新计划(2016);入选中国科学院-美国科学院空间科学新领军人物(2019);担任全球定量遥感最新进展国际会议(International Symposium on Recent Advances in Quantitative Remote Sensing)科学委员会委员、中国遥感应用...

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Angular normalization of land surface temperature and emissivity using multiangular middle and thermal infrared data

发布时间: 2022-01-20 点击次数:

  • 影响因子:0.0
  • DOI码:10.1109/TGRS.2013.2285924
  • 发表刊物:IEEE Transactions on Geoscience and Remote Sensing
  • 关键字:Bidirectional reflectance distribution function (BRDF) model, directional effective temperature, directional emissivity, multiangular thermal remote sensing, temperature-independent spectral indices (TISI)
  • 摘要:This paper aimed at the case of nonisothermal pixels and proposed a daytime temperature-independent spectral indices (TISI) method to retrieve directional emissivity and effective temperature from daytime multiangular observed images in both middle and thermal infrared (MIR and TIR) channels by combining the kernel-driven bidirectional reflectance distribution
    function (BRDF) model and the TISI method. Four groups of angular observations and two groups of MIR and TIR channels with narrow and broad bandwidths were used to investigate the influence of angular observations and bandwidth on the retrieval accuracy.Model sensitivity analysis indicated that the new method can generally obtain directional emissivity and temperature with an error less than 0.015 and 1.5 K if the noise included in the measured directional brightness temperature (DBT) and atmospheric data was no more than 1.0 K and 10%, respectively. The analysis also indicated that 1) large-angle intervals among the angular observations and a larger viewing zenith angle, with respect to nadir direction, can improve the retrieval accuracy because those angle conditions can result in significant difference for components’ fractions and DBT under different viewing directions; 2) narrow channels can produce better results than broad channels. The new method was finally applied to a multiangular MIR and TIR data set acquired by an airborne system, and a modified kernel-driven BRDF model was used for angular normalization to the surface temperature for the first time. The difference of the retrieved emissivity and Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) emissivity was found to be approximately 0.012 in the study area.
  • 论文类型:期刊论文
  • 学科门类:理学
  • 一级学科:地理学
  • 文献类型:J
  • 卷号:52
  • 期号:8
  • 页面范围:4913-4931
  • 是否译文:
  • 收录刊物:SCI
  • 第一作者:Huazhong Ren
  • 通讯作者:Guangjian Yan
  • 全部作者:Rongyuan Liu,Xihan Mu,Zhao-Liang Li,Françoise Nerry,Qiang Liu
  • 发表时间:2014-08-01