兰州大学机构库
Upscaling of Single-Site-Based Measurements for Validation of Long-Term Coarse-Pixel Albedo Products
Wu, Xiaodan1; Wen, Jianguang2; Xiao, Qing2; Youe, Dongqin2
2020-05
Source PublicationIEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
ISSN0196-2892
Volume58Issue:5Pages:3411-3425
AbstractThe in situ measurements from globally distributed sparse networks provide a valuable data source for the validation of satellite products. However, the representativeness errors resulting from the spatial scale mismatch between in situ-satellite measurements and surface heterogeneity have generally limited past validation to only very few spatially representative sites, which cannot meet the requirement of a comprehensive validation. In response to this challenge, this article offers a strategy for upscaling sparse in situ measurements and removing the impact of representativeness errors on the evaluation of coarse-pixel albedo products. The main idea of the upscaling method is to establish the correspondence relationship between each subpixel albedo time series within a coarse pixel and in situ albedo time series by using high-resolution albedo maps as the prior knowledge. Furthermore, the performance of the upscaling method is carefully evaluated over the sites featured by different degrees of spatial representativeness. The results indicate that the upscaling method improves the representativeness of single-site measurements with respect to a coarse pixel, and the improvement is most significant over the sites with relatively low representativeness. Therefore, the upscaling method is particularly useful for the validation at heterogeneous sites in strengthening the reliability of validation results. It is expected to open the door to maximizing the use of existing sparse networks and generating a time series of globally distributed reference data sets with sufficient length, consistency, and continuity.
KeywordHeterogeneous sites sparse networks spatial mismatch upscaling validation
DOI10.1109/TGRS.2019.2954879
URL查看原文
Indexed ByEI ; SCIE
Language英语
Funding ProjectNational Natural Science Foundation of China[41801226] ; Fundamental Research Funds for the Central Universities[lzujbky-2018-45]
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:000529868700033
PublisherIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
EI Accession Number20201908615067
EI KeywordsSolar radiation ; Time series
EI Classification NumberSolar Energy and Phenomena:657.1 ; Mathematical Statistics:922.2
Original Document TypeArticle
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Document Type期刊论文
Identifierhttp://ir.lzu.edu.cn/handle/262010/415186
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. Upscaling of Single-Site-Based Measurements for Validation of Long-Term Coarse-Pixel Albedo Products[J]. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,2020,58(5):3411-3425.
APA Wu, Xiaodan,Wen, Jianguang,Xiao, Qing,&Youe, Dongqin.(2020).Upscaling of Single-Site-Based Measurements for Validation of Long-Term Coarse-Pixel Albedo Products.IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,58(5),3411-3425.
MLA Wu, Xiaodan,et al."Upscaling of Single-Site-Based Measurements for Validation of Long-Term Coarse-Pixel Albedo Products".IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 58.5(2020):3411-3425.
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