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Produtos de reflectância superficial GF-1 WFV para a região continental chinesa

  • 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：佘文庆， 研究方向为遥感定量参数反演。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：张兆明， 研究方向为遥感大数据智能处理与信息提取。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

Resumo

O sensor WFV a bordo do satélite GF-1 possui alta resolução espacial e capacidade de imagem em grande escala, sendo uma fonte importante de dados para investigação de recursos e proteção do meio ambiente ecológico. Atualmente, os dados GF-1 WFV são fornecidos apenas como produtos padronizados de nível L1, faltando produtos de reflectância superficial, que são a base para a maioria dos estudos quantitativos de sensoriamento remoto. Para desenvolver produtos de reflectância superficial GF-1 WFV, este artigo propõe um algoritmo de correção atmosférica 6S baseado na fusão espacial multifuente do MODIS AOD e uma tabela dinâmica de consulta, produzindo e compartilhando produtos de reflectância superficial para a região continental chinesa de 2020. Para validação da precisão do produto, foram comparadas a qualidade das imagens antes e depois da correção atmosférica, histogramas e diferenças de reflectância de objetos típicos, além de validação quantitativa utilizando produtos sincronizados de reflectância superficial do Landsat 8 OLI e dados de campo. Os resultados de validação e análise indicam melhoria significativa na qualidade da imagem após a correção atmosférica, com boa consistência com os produtos de reflectância superficial do Landsat 8 OLI. A validação baseada em dados medidos de reflectância superficial indicou erros quadráticos médios (RMSE) de 1,21%, 1,53%, 1,26% e 6,14% para as bandas azul, verde, vermelha e do infravermelho próximo, respectivamente. Os resultados indicam que os produtos desenvolvidos de reflectância superficial GF-1 WFV são de qualidade confiável e que o algoritmo do produto possui capacidade de produção automatizada e comercial.

Palavras-chave

Sensoriamento remoto; GF-1 WFV; reflectância superficial; correção atmosférica; modelo 6S; fusão espacial; tabela dinâmica de consulta; região continental chinesa

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