Processing of S2 images based on SPARC + Javio dataset
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Processing of S2 images based on SPARC + Javio dataset
Aims to exploit the capacity of Sentinel-1 and. Sentinel-2 images to develop an innovative portfolio of prototypes agricultural services: - Surface Soil Moisture.
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The SENSAGRI Sentinel-2 LAI green/brown product: algorithm development, validation and mapping E. Amin , J. Verrelst, J.P. Rivera-Caicedo, A. Ruiz-Verdú, J. Delegido, N. Pasqualotto, J. Moreno
The SENSAGRI Sentinel-2 LAI green/brown product: algorithm development, validation and mapping
Sentinels Synergy for Agriculture
Aims to exploit the capacity of Sentinel-1 and Sentinel-2 images to develop an innovative portfolio of prototypes agricultural services: - Surface Soil Moisture - Crop type mapping - LAI green and brown retrieval
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The SENSAGRI Sentinel-2 LAI green/brown product: algorithm development, validation and mapping
LAI green/brown Green vegetation Current operational LAI products focus on vegetation in photosynthesizing stage
Senescent vegetation Significant amount of aboveground biomass Key factor in the carbon cycle Crop damage monitoring Fire risk monitoring 3/18 3/24
The SENSAGRI Sentinel-2 LAI green/brown product: algorithm development, validation and mapping
LAI green/brown
B11
B12
Sentinel-2
Brown and green LAI mapping through spectral indices. Delegido et al. 2015
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The SENSAGRI Sentinel-2 LAI green/brown product: algorithm development, validation and mapping
Gaussian Processes Regression (GPR) • Machine Learning Regression Algorithm (MLRA) • Training datasets of Input – Output data pairs - Input: Reflectance observations - Output: Biophysical variable (LAI)
• Delivery of associated uncertainties • Ranking of the spectral bands relevance GPR
Band ranking
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The SENSAGRI Sentinel-2 LAI green/brown product: algorithm development, validation and mapping
GPR model development (v.01)
0.6
Reflectance
0.5 0.4 0.3 0.2 0.1 0 0
500
1000
1500
2000
2500
nm
GPR model LAI green Training database
K-Fold cross validation 4k
GPR model LAI brown 6/18
The SENSAGRI Sentinel-2 LAI green/brown product: algorithm development, validation and mapping
GPR model evaluation & optimization Model LAI green LAI brown
RMSEC-V [m2/m2] 0.66 0.55
LAI green
NRMSEC-V (%) 7.09 13.66
R2C-V
Time [s]
0.89 0.75
0.58 0.35
LAI brown
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The SENSAGRI Sentinel-2 LAI green/brown product: algorithm development, validation and mapping
GPR model evaluation & band analysis Model LAI green LAI brown
RMSEC-V [m2/m2] 0.66 0.55
LAI green
NRMSEC-V (%) 7.09 13.66
R2C-V
Time [s]
0.89 0.75
0.58 0.35
LAI brown
The lower the sigma the more relevant the band
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The SENSAGRI Sentinel-2 LAI green/brown product: algorithm development, validation and mapping
