GF-4/PMS与GF-1/WFV两种传感器地表反射率及NDVI一致性分析
2015年12月中国成功发射高分系列中首颗地球静止轨道卫星高分四号(GF-4),实现与高分一号(GF-1)近极地轨道卫星的优势互补,构成了具有多种空间和时间分辨率的对地观测体系。该文研究并分析了GF-4/PMS与GF-1/WFV地表反射率与NDVI的一致性,结果表明:一致性研究的最优空间尺度为50 m;GF-4/PMS与GF-1/WFV地表反射率存在较好的线性关系,各波段相关系数R均在0.7以上,传感器之间反射率的系统性偏差可以通过线性回归模型校正,校正后各波段反射率的RMSE明显降低;NDVI能够消除不同波段地表反射率"同增同减"偏差的影响,在GF-4地表反射率校正前后均表现出与GF-1较好...
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| Published in | 农业工程学报 Vol. 33; no. 9; pp. 167 - 173 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
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,北京,100871%地理信息基础软件与应用国家测绘地理信息局工程技术研究中心,北京,100871%空间信息集成与3S工程应用北京市重点实验室,北京,100871
2017
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1002-6819 |
| DOI | 10.11975/j.issn.1002-6819.2017.09.021 |
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| Summary: | 2015年12月中国成功发射高分系列中首颗地球静止轨道卫星高分四号(GF-4),实现与高分一号(GF-1)近极地轨道卫星的优势互补,构成了具有多种空间和时间分辨率的对地观测体系。该文研究并分析了GF-4/PMS与GF-1/WFV地表反射率与NDVI的一致性,结果表明:一致性研究的最优空间尺度为50 m;GF-4/PMS与GF-1/WFV地表反射率存在较好的线性关系,各波段相关系数R均在0.7以上,传感器之间反射率的系统性偏差可以通过线性回归模型校正,校正后各波段反射率的RMSE明显降低;NDVI能够消除不同波段地表反射率"同增同减"偏差的影响,在GF-4地表反射率校正前后均表现出与GF-1较好的一致性,校正前后相关系数R分别为0.74和0.77。因此,GF-4在农业和植被遥感中具有较好的高分系列数据延续性和应用潜力。 |
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| Bibliography: | sensors; remote sensing; pixels; GF-4; GF-1; surface reflectance; NDVI; consistency 11-2047/S Sun Yuanheng, Qin Qiming, Ren Huazhong, Zhang Tianyuan (1. Institute of Remote Sensing and Geographical Information System, School of Earth and Space Science, Peking University, Beijing 100871 China; 2. Engineering Research Center for Geographical Information Basic Softwares and Applications under State Bureau of Surveying and Mapping, Beijing 100871, China; 3. Beijing Key Lab of Spatial Information Integration and 3S Application, Peking University, Beijing 100871, China) As the first geostationary satellite of China's National High-resolution Observation Program (GaoFen Project), GaoFen-4 (GF-4) which launched in December 2015 enjoys the features of high temporal resolution and wide observation with a spatial resolution of 50 m. Meanwhile, GaoFen-4 together with GaoFen-1 (GF-1) polar-orbiting satellite forms a multi-spatial-temporal-resolution ground observation system, which provides more choices for agricultural remo |
| ISSN: | 1002-6819 |
| DOI: | 10.11975/j.issn.1002-6819.2017.09.021 |