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Modeling the Canopy Directional Brightness Temperature Based on Path Length Distribution

文献类型： 会议论文

第一作者： Weihua Li

作者： Weihua Li 1 ; Guangjian Yan 2 ; Zhaoliang Li 3 ; Xihan Mu 2 ; Donghui Xie 2 ; Jean-Philippe Gastellu-Etchegorry 4 ;

作者机构： 1.State Key Laboratory of Remote Sensing Science, Faculty of Geographical Science, Beijing Normal University, Beijing, China|Beijing Engineering Research Center for Global Land Remote Sensing Products, Faculty of Geographical Science, Beijing Normal University, Beijing, China|CESBIO, CNES-CNRS-IRD-UT3, University of Toulouse, France

2.State Key Laboratory of Remote Sensing Science, Faculty of Geographical Science, Beijing Normal University, Beijing, China|Beijing Engineering Research Center for Global Land Remote Sensing Products, Faculty of Geographical Science, Beijing Normal University, Beijing, China

3.Key Laboratory of Agricultural Remote Sensing, Ministry of Agriculture and Rural Affairs/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China

4.CESBIO, CNES-CNRS-IRD-UT3, University of Toulouse, France

关键词： Analytical models;Temperature distribution;Computational modeling;Land surface;Vegetation mapping;Thermal conductivity;Brightness temperature

会议名称： IEEE International Geoscience and Remote Sensing Symposium

主办单位：

页码： 343-346

摘要： Land surface temperature plays a crucial role in ecosystem energy balance and material exchanges. Remote sensing is vital for investigating brightness temperature variations. The intricate canopy structure poses challenges, especially with strong directional anisotropy in brightness temperature, leading to assessment inaccuracies. The radiative transfer model provides valuable insights into how canopy structure influences directional brightness temperature (DBT). Traditional models, assuming a turbid medium or randomly distributed ideal geometry, exhibit notable errors. However, the PATH_RT model, incorporating path length distribution, shows commendable performance in the optical domain. To enhance applicability, we modify the PATH_RT model, successfully implementing path length distributions for simulating DBT in the thermal domain. Validation using abstract scenes, cross-validated with SAIL and FRT, and referencing DART, highlights significant improvement attributed to the efficacy of path length distribution.

分类号： tp7

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