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Impacts and Contributors of Representativeness Errors of In Situ Albedo Measurements for the Validation of Remote Sensing Products
Wu, Xiaodan1; Wen, Jianguang2; Xiao, Qing2; You, Dongqin2; Lin, Xingwen2; Wu, Shengbiao2; Zhong, Shouyi2
2019-12
Source PublicationIEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
ISSN0196-2892
Volume57Issue:12Pages:9740-9755
AbstractValidation of remote sensing albedo products involves comparisons between point-scale in situ observations and footprint-scale satellite retrievals. However, the observed differences between product and in situ observations are not only attributable to intrinsic errors of satellite products but also to inadequate spatial representativeness of in situ observations. Here, representativeness errors of in situ observations and their effects on validation results were quantitatively explored. Furthermore, the contributors and their influences on representativeness errors were quantified. In the case of large representativeness errors, validation result errors are mainly controlled by representativeness errors. When representativeness errors are small, validation result errors are likely affected by other factors and can be so large that cannot be ignored. Surface heterogeneity is most positively related to representativeness errors, followed by the deviation distance of in situ site from the pixel center. The representative area surrounding in situ sites only shows a weak negative correlation with representativeness errors. The range seems to be not a good indicator of spatial representativeness of in situ sites since there is almost no relationship between them. When these factors are combined, surface heterogeneity contributes more to representativeness errors on the 500-m pixel scale, while quantitative impacts of the representative area and location deviation of in situ sites are not fully understood because magnitudes of these effects are dependent on the choice of high-resolution data set. These findings enhance our understanding about spatial representativeness of in situ observations and improve the quality of validation results based on single in situ observations.
KeywordAlbedo products representativeness errors spatial mismatch surface heterogeneity validation
DOI10.1109/TGRS.2019.2928954
URL查看原文
Indexed BySCIE
Language英语
Funding ProjectNational Natural Science Foundation of China[41671366][41601380][41801226]
WOS Research AreaGeochemistry & Geophysics ; Engineering ; Remote Sensing ; Imaging Science & Photographic Technology
WOS SubjectGeochemistry & Geophysics ; Engineering, Electrical & Electronic ; Remote Sensing ; Imaging Science & Photographic Technology
WOS IDWOS:000505701800019
PublisherIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Original Document TypeArticle
Citation statistics
Document Type期刊论文
Identifierhttp://ir.lzu.edu.cn/handle/262010/368741
Collection兰州大学
Corresponding AuthorWen, Jianguang
Affiliation1.Lanzhou Univ, Coll Earth & Environm Sci, Lanzhou 730000, Peoples R China
2.Chinese Acad Sci, Inst Remote Sensing & Digital Earth, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China
First Author AffilicationCollege of Earth Environmental Sciences
Recommended Citation
GB/T 7714
Wu, Xiaodan,Wen, Jianguang,Xiao, Qing,et al. Impacts and Contributors of Representativeness Errors of In Situ Albedo Measurements for the Validation of Remote Sensing Products[J]. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,2019,57(12):9740-9755.
APA Wu, Xiaodan.,Wen, Jianguang.,Xiao, Qing.,You, Dongqin.,Lin, Xingwen.,...&Zhong, Shouyi.(2019).Impacts and Contributors of Representativeness Errors of In Situ Albedo Measurements for the Validation of Remote Sensing Products.IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,57(12),9740-9755.
MLA Wu, Xiaodan,et al."Impacts and Contributors of Representativeness Errors of In Situ Albedo Measurements for the Validation of Remote Sensing Products".IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 57.12(2019):9740-9755.
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