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Article: PLC-C: An Integrated Method for Sentinel-2 Topographic and Angular Normalization

TitlePLC-C: An Integrated Method for Sentinel-2 Topographic and Angular Normalization
Authors
KeywordsAngular normalization
bidirectional reflectance distribution function (BRDF)
consistent surface reflectance
Sentinel-2
topographic normalization
Issue Date2021
Citation
IEEE Geoscience and Remote Sensing Letters, 2021, v. 18, n. 8, p. 1446-1450 How to Cite?
AbstractTopographic and angular corrections on Sentinel-2 imagery are crucial for the generation of consistent surface reflectance. We propose a novel topographic-angular integrated normalization approach based on the combination of the path length correction (PLC) and C-factor approaches. The PLC-C normalization approach is a semiphysical method with limited use of auxiliary data: only a digital elevation model and a fixed set of kernel coefficients, ensuring its transferability for operational implementation. For the validation, we used two Sentinel-2A images over a mountainous area observed in backward (BS) and forward scattering (FS) directions from laterally adjacent orbit swaths. PLC-C significantly reduced both the topographic and directional anisotropy effects: the overlapping ratio between BS and FS observations was increased from 84.1% to 92.8% for the near-infrared band, and from 81.0% to 93.1% for the red band; the coefficient of variation of the reflectances across different aspects, which was used as a criterion of topographic effects, was reduced from 9.8%/12.2% to 3.6%/5.7% in BS/FS direction for the near-infrared band, and from 8.1%/9.7% to 4.5%/4.2% for the red band. PLC-C will contribute to the generation of analysis ready data from Sentinel-2 top of canopy reflectance.
Persistent Identifierhttp://hdl.handle.net/10722/327343
ISSN
2023 Impact Factor: 4.0
2023 SCImago Journal Rankings: 1.248
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorYin, Gaofei-
dc.contributor.authorLi, Jing-
dc.contributor.authorXu, Baodong-
dc.contributor.authorZeng, Yelu-
dc.contributor.authorWu, Shengbiao-
dc.contributor.authorYan, Kai-
dc.contributor.authorVerger, Aleixandre-
dc.contributor.authorLiu, Guoxiang-
dc.date.accessioned2023-03-31T05:30:39Z-
dc.date.available2023-03-31T05:30:39Z-
dc.date.issued2021-
dc.identifier.citationIEEE Geoscience and Remote Sensing Letters, 2021, v. 18, n. 8, p. 1446-1450-
dc.identifier.issn1545-598X-
dc.identifier.urihttp://hdl.handle.net/10722/327343-
dc.description.abstractTopographic and angular corrections on Sentinel-2 imagery are crucial for the generation of consistent surface reflectance. We propose a novel topographic-angular integrated normalization approach based on the combination of the path length correction (PLC) and C-factor approaches. The PLC-C normalization approach is a semiphysical method with limited use of auxiliary data: only a digital elevation model and a fixed set of kernel coefficients, ensuring its transferability for operational implementation. For the validation, we used two Sentinel-2A images over a mountainous area observed in backward (BS) and forward scattering (FS) directions from laterally adjacent orbit swaths. PLC-C significantly reduced both the topographic and directional anisotropy effects: the overlapping ratio between BS and FS observations was increased from 84.1% to 92.8% for the near-infrared band, and from 81.0% to 93.1% for the red band; the coefficient of variation of the reflectances across different aspects, which was used as a criterion of topographic effects, was reduced from 9.8%/12.2% to 3.6%/5.7% in BS/FS direction for the near-infrared band, and from 8.1%/9.7% to 4.5%/4.2% for the red band. PLC-C will contribute to the generation of analysis ready data from Sentinel-2 top of canopy reflectance.-
dc.languageeng-
dc.relation.ispartofIEEE Geoscience and Remote Sensing Letters-
dc.subjectAngular normalization-
dc.subjectbidirectional reflectance distribution function (BRDF)-
dc.subjectconsistent surface reflectance-
dc.subjectSentinel-2-
dc.subjecttopographic normalization-
dc.titlePLC-C: An Integrated Method for Sentinel-2 Topographic and Angular Normalization-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1109/LGRS.2020.3001905-
dc.identifier.scopuseid_2-s2.0-85111083685-
dc.identifier.volume18-
dc.identifier.issue8-
dc.identifier.spage1446-
dc.identifier.epage1450-
dc.identifier.eissn1558-0571-
dc.identifier.isiWOS:000675210700033-

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