Racunanje opticke dubine aerosola na temelju satelitskih podataka povezanih s opažanjima na tlu u urbanim i ruralnim podrucjima

Le Thi Le, Hang Thi Thuy Hang, Cuong Xuan Cao, Nghia Viet Nguyen, Long Quoc Nguyen, Ha Thi Thu Le, Lan Thi Pham, Chan Van Le, Lin Tang-Huang

研究成果: 雜誌貢獻期刊論文同行評審


Aerosol optical depth (AOD) can be retrieved accurately with sequential ground-based measurements of direct and diffuse solar radiance. However, spatial coverage and location frequency cause certain limitations. Hence, satellite image data are a proper tool for obtaining aerosol optical depth products with more spatial information and patterns of aerosol distribution. Currently, aerosol remote sensing may enhance our understanding of the optimal approach to AOD retrieval over urban and rural areas, and how it differs due to the characteristics of surface reflectivity. The article deals with the concepts of contrast reduction, and dark target approaches are examined using Landsat imaging and the observation of a sun photometer for integrating aerosol optical depth distribution over the city of Taipei in Taiwan. For areas with bright surfaces, such as urban areas, the above concepts were applied using the dispersion coefficient method with a sun photometer, in order to reduce errors considerably in the product. In contrast, a dark target algorithm with a relationship of surface reflectance between the blue (0.49 µm), red (0.66 µm), and infrared (2.1 µm) spectral bands is suitable for moist soils and vegetation areas. The retrieval of AOD spatial distribution is compared with MODIS AOD products and AERONET to verify the accuracy of the results. The RMSE ranged from 0.2 to 0.4, and about 50% of the data were within expected error margins (EE=± (0.05+0.1 5 AODsunphotometer).

貢獻的翻譯標題Retrieval of aerosol optical depth using satellite data associated with ground-based observations over urban and rural areas
頁(從 - 到)4-17
期刊Kartografija i Geoinformacije
出版狀態已出版 - 2019


  • Aerosol optical depth
  • Aerosol remote sensing
  • Taipei
  • Taiwan


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