Productos de reflectancia de superficie GF-1 WFV para la región terrestre china

  • role: First author第一作者
  • Affiliation:

    Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China

    University of Chinese Academy of Sciences, Beijing 100049, China

  • Email:shewenqing20@mails.ucas.ac.cn
  • Introduction: E-mail shewenqing20@mails.ucas.ac.cn
SHE Wenqing12,  
  • role: Corresponding author通信作者
  • Affiliation:

    Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China

    University of Chinese Academy of Sciences, Beijing 100049, China

    Key Laboratory of Earth Observation of Hainan Province, Hainan Aerospace Information Research Institute, Sanya 572029, China

  • Email:zhangzhaoming@aircas.ac.cn
  • Introduction: E-mail zhangzhaoming@aircas.ac.cn
ZHANG Zhaoming123*,  
  • Affiliation:

    Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China

    Key Laboratory of Earth Observation of Hainan Province, Hainan Aerospace Information Research Institute, Sanya 572029, China

PENG Yan13,  
  • Affiliation:

    Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China

    University of Chinese Academy of Sciences, Beijing 100049, China

    Key Laboratory of Earth Observation of Hainan Province, Hainan Aerospace Information Research Institute, Sanya 572029, China

HE Guojin123,  
  • Affiliation:

    Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China

    University of Chinese Academy of Sciences, Beijing 100049, China

    Key Laboratory of Earth Observation of Hainan Province, Hainan Aerospace Information Research Institute, Sanya 572029, China

LONG Tengfei123,  
  • Affiliation:

    Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China

    Key Laboratory of Earth Observation of Hainan Province, Hainan Aerospace Information Research Institute, Sanya 572029, China

WANG Guizhou13

resumen

El sensor WFV a bordo del satélite GF-1 posee una alta resolución espacial y capacidad de imagen de amplio rango, siendo una fuente importante de datos en áreas de investigación de recursos y protección del medio ambiente ecológico. Actualmente, los datos GF-1 WFV solo están disponibles como productos estandarizados de nivel L1, careciendo de productos de reflectancia de superficie, los cuales son la base para la mayoría de estudios cuantitativos de teledetección. Para desarrollar productos de reflectancia de superficie GF-1 WFV, este artículo propone un algoritmo de corrección atmosférica 6S basado en la fusión espacial multifuente del AOD MODIS y una tabla de búsqueda dinámica, produciendo y compartiendo productos de reflectancia de superficie para la región terrestre de China en 2020. Para la validación de precisión del producto, se comparó la calidad de las imágenes antes y después de la corrección atmosférica, histogramas y diferencias de reflectancia de objetos típicos, y se realizó una validación cuantitativa con productos sincronizados de reflectancia de superficie Landsat 8 OLI y datos de campo. Los resultados de precisión y análisis muestran una mejora significativa en la calidad de la imagen después de la corrección atmosférica, con buena coherencia con los productos de reflectancia de superficie Landsat 8 OLI. La validación basada en datos medidos de reflectancia de superficie indica errores cuadráticos medios (RMSE) de 1.21%, 1.53%, 1.26% y 6.14% para las bandas azul, verde, roja e infrarrojo cercano, respectivamente. Los resultados indican que los productos desarrollados de reflectancia de superficie GF-1 WFV son de calidad confiable y que el algoritmo tiene capacidad de producción automatizada y comercial.

palabra clave

Teledetección; GF-1 WFV; reflectancia de superficie; corrección atmosférica; modelo 6S; fusión espacial; tabla de búsqueda dinámica; región terrestre china

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