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- Publisher Website: 10.1109/TGRS.2003.813493
- Scopus: eid_2-s2.0-0141974913
- WOS: WOS:000185419200016
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Article: Retrieving leaf area index with a neural network method: Simulation and validation
Title | Retrieving leaf area index with a neural network method: Simulation and validation |
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Authors | |
Keywords | Enhanced thematic mapper plus (ETM+) Leaf area index (LAI) Neural networks (NNs) Radiative transfer Soil reflectance index (SRI) |
Issue Date | 2003 |
Citation | IEEE Transactions on Geoscience and Remote Sensing, 2003, v. 41, n. 9 PART I, p. 2052-2062 How to Cite? |
Abstract | Leaf area index (LAI) is a crucial biophysical parameter that is indispensable for many biophysical and climatic models. A neural network algorithm in conjunction with extensive canopy and atmospheric radiative transfer simulations is presented in this paper to estimate LAI from Landsat-7 Enhanced Thematic Mapper Plus data. Two schemes were explored; the first was based on surface reflectance, and the second on top-of-atmosphere (TOA) radiance. The implication of the second scheme is that atmospheric corrections are not needed for estimating the surface LAI. A soil reflectance index (SRI) was proposed to account for variable soil background reflectances. Ground-measured LAI data acquired at Beltsville, MD were used to validate both schemes. The results indicate that both methods can be used to estimate LAI accurately. The experiments also showed that the use of SRI is very critical. |
Persistent Identifier | http://hdl.handle.net/10722/321276 |
ISSN | 2023 Impact Factor: 7.5 2023 SCImago Journal Rankings: 2.403 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Fang, Hongliang | - |
dc.contributor.author | Liang, Shunlin | - |
dc.date.accessioned | 2022-11-03T02:17:49Z | - |
dc.date.available | 2022-11-03T02:17:49Z | - |
dc.date.issued | 2003 | - |
dc.identifier.citation | IEEE Transactions on Geoscience and Remote Sensing, 2003, v. 41, n. 9 PART I, p. 2052-2062 | - |
dc.identifier.issn | 0196-2892 | - |
dc.identifier.uri | http://hdl.handle.net/10722/321276 | - |
dc.description.abstract | Leaf area index (LAI) is a crucial biophysical parameter that is indispensable for many biophysical and climatic models. A neural network algorithm in conjunction with extensive canopy and atmospheric radiative transfer simulations is presented in this paper to estimate LAI from Landsat-7 Enhanced Thematic Mapper Plus data. Two schemes were explored; the first was based on surface reflectance, and the second on top-of-atmosphere (TOA) radiance. The implication of the second scheme is that atmospheric corrections are not needed for estimating the surface LAI. A soil reflectance index (SRI) was proposed to account for variable soil background reflectances. Ground-measured LAI data acquired at Beltsville, MD were used to validate both schemes. The results indicate that both methods can be used to estimate LAI accurately. The experiments also showed that the use of SRI is very critical. | - |
dc.language | eng | - |
dc.relation.ispartof | IEEE Transactions on Geoscience and Remote Sensing | - |
dc.subject | Enhanced thematic mapper plus (ETM+) | - |
dc.subject | Leaf area index (LAI) | - |
dc.subject | Neural networks (NNs) | - |
dc.subject | Radiative transfer | - |
dc.subject | Soil reflectance index (SRI) | - |
dc.title | Retrieving leaf area index with a neural network method: Simulation and validation | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1109/TGRS.2003.813493 | - |
dc.identifier.scopus | eid_2-s2.0-0141974913 | - |
dc.identifier.volume | 41 | - |
dc.identifier.issue | 9 PART I | - |
dc.identifier.spage | 2052 | - |
dc.identifier.epage | 2062 | - |
dc.identifier.isi | WOS:000185419200016 | - |