Results 181 to 190 of about 5,055 (231)

Scaling Transform Method for Remotely Sensed FAPAR Based on FAPAR-P Model

IEEE Geoscience and Remote Sensing Letters, 2015
Climate and land–atmosphere models rely on accurate land-surface parameters, such as the fraction of absorbed photosynthetically active radiation (FAPAR). It is known that FAPAR values retrieved from remote-sensing images suffer from scaling effects. Scaling transformation aims to derive accurate FAPAR values at a specific scale from values at other ...
null Lu Wang, null Wenjie Fan, null Xiru Xu, null Yuan Liu   +3 more
openaire   +1 more source

Validation of the operational MERIS FAPAR

2007 IEEE International Geoscience and Remote Sensing Symposium, 2007
This paper discusses the validation of the operational Medium Resolution Imaging Spectrometer (MERIS) land product which corresponds to the Fraction of Absorbed Photosynthetically Active Radiation (FAPAR). This biophysical variable acts as an indicator of the presence and state of the vegetation and it is currently estimated from MERIS data at both ...
Nadine Gobron, Bernard Pinty, Ophelie Aussedat, Thomas Lavergne, Frederic Melin, Monica Robustelli, Malcolm Taberner   +6 more
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Evaluation of the MERIS/ENVISAT FAPAR product

Advances in Space Research, 2007
Abstract This paper describes the evaluation and performance of the Medium Resolution Imaging Spectrometer (MERIS) Global Vegetation Index (MGVI) algorithm that is implemented in the MERIS ground segment as the primary land surface product. MGVI output values represent the Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) which acts as
Nadine Gobron, Bernard Pinty, Frédéric Mélin, Malcolm Taberner, Michel M. Verstraete, Monica Robustelli, Jean-Luc Widlowski   +6 more
openaire   +1 more source

Crop type mapping and LAI, fAPAR, and fCover prediction in winter wheat fields with Sentinel-2 data

International Conference on Remote Sensing and Geoinformation of Environment, 2023
The aim of this study is to map winter wheat fields in designated study area in Bulgaria and to analyze the spatial variation of various biophysical parameters of winter wheat crops in these fields using multispectral satellite imagery.
I. Kamenova
semanticscholar   +1 more source

A new FAPAR retrieval model for continuous vegetation

2013 IEEE International Geoscience and Remote Sensing Symposium - IGARSS, 2013
The Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) is the fraction of incoming solar radiation that is absorbed by green vegetation in the spectral range from 400 nm to 700 nm. FAPAR reflects the energy absorption ability of vegetation canopy.
Yuan Liu, Wenjie Fan, Xiru Xu, Gaoxing Chen   +3 more
openaire   +1 more source

Canopy Scale High-Resolution Forest Biophysical Parameter (LAI, fAPAR, and fCover) Retrieval Through Machine Learning and Cloud Computation Approach

2023 International Conference on Machine Intelligence for GeoAnalytics and Remote Sensing (MIGARS), 2023
High-resolution Forest biophysical parameter estimation is crucial to understand forest structural and functional variability. Moreover, mapping high-resolution biophysical products is significant to capture accurate forest carbon fluxes and understand ...
S. Bandopadhyay, Barnali Das, Alexander Cotrina Sánchez, S. Banerjee, B. Banerjee, Subhasis Ghosh   +5 more
semanticscholar   +1 more source

Estimation of canopy fAPAR using optical reflectance and airborne LiDAR data

Remote Sensing of Environment
Dalei Han, Jing Liu, Shan Xu, Tiangang Yin, Siya Liu, Runfei Zhang, Peiqi Yang   +6 more
semanticscholar   +2 more sources

A model for instantaneous FAPAR retrieval: Theory and validation

2009 IEEE International Geoscience and Remote Sensing Symposium, 2009
The Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) is a critical input parameter to many climate and ecological models. Its calculation accuracy from remote sensing images directly influences the estimation of net primary productivity (NPP) and carbon cycle. This paper presents a hybrid model combining the characteristics of geometric
Xin Tao, Dacheng Wang, Daihui Wu, Binyan Yan, Wenjie Fan, Xiru Xu, Yanjuan Yao   +6 more
openaire   +1 more source

Seasonality of albedo and FAPAR in a boreal forest

Agricultural and Forest Meteorology, 2017
Abstract Satellite data are continuously used to monitor albedo and fraction of absorbed photosynthetically active radiation (FAPAR), which are key components in determining the energy balance and productivity of forests. However, due to the mismatch between spatial resolution of the satellite data and forest stand size, coarse resolution satellite ...
Lukes, Petr, Rautiainen, Miina, Hovi, Aarne   +3 more
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Monitoring FAPAR over land surfaces with remote sensing data

SPIE Proceedings, 2004
Temporal changes of terrestrial vegetation have traditionally been monitored using empirical remote sensing tools, which are sensitive to perturbations as well as to the spectral properties of the sensor. Advances in the understanding of radiation transfer theory, and the availability of higher performance modern instruments, have led to the ...
Nadine Gobron, Bernard Pinty, Malcolm Taberner, Frederic Melin, Jean-Luc Widlowski, Michel M. Verstraete   +5 more
openaire   +1 more source