Results 51 to 60 of about 582 (135)

Assessing the accuracy of the MODIS LAI 1-km product in southeastern United States loblolly pine plantations: Accounting for measurement variance from ground to satellite [PDF]

open access: yes, 2006
Leaf area index (LAI), defined here as one-half of the total leaf area per unit ground surface area (Chen, 1996), has been estimated at a global scale from spectral data processed from the Moderate Resolution Imaging Spectroradiometer (MODIS) sensor ...
Iiames, John Shepherd, Jr.
core   +1 more source

Validation of the vertical canopy cover profile products derived from GEDI over selected forest sites

open access: yesScience of Remote Sensing
Canopy cover (CC) quantifies the proportion of canopy materials projected vertically onto the ground surface. CC is a crucial canopy structural variable and is commonly used in many ecological and climatic models.
Yu Li   +6 more
doaj   +1 more source

Influence of sun zenith angle on canopy clumping and the resulting impacts on photosynthesis [PDF]

open access: yes, 2020
Addressing the impact of vegetation architecture on shortwave radiation transfer in land surface models is important for accurate weather forecasting, carbon budget estimates, and climate predictions. This paper investigates to what extent it is possible
Baldocchi, Dennis   +6 more
core   +1 more source

Estimación remota del área de planta en un bosque seco : validación de un sistema autónomo de captura y almacenamiento de datos [PDF]

open access: yes, 2014
El índice de área foliar es clave en el control de los procesos de los ecosistemas y como tal se busca estimarlo cada vez con mayor precisión y frecuencia para estudios locales, regionales y globales.
Llavallol, Carolina Isabel
core  

Near-infrared digital hemispherical photography enables correction of plant area index for woody material during leaf-on conditions [PDF]

open access: yes
Indirect optical measurement techniques enable efficient and non-destructive estimation of plant area index (PAI). However, because they cannot distinguish between foliage and other canopy elements, corrections are needed to determine leaf area index ...
Akcay, Haydar   +9 more
core   +2 more sources

Seasonal variation of canopy vertical structural profiles measured at two temperate forests: intercomparison of tower, mast, crane, and UAV measurements

open access: yesTrees
Evaluated tower, mast, crane, and UAV methods for forest vertical gap fraction, LAI, and CI measurements in different seasons. UAV is promising for forest vertical structural profiling.
Hongliang Fang   +7 more
semanticscholar   +1 more source

Abstracts of the 11th Annual Meeting of the Israel Society for Neuroscience

open access: yes, 2002
Neural Plasticity, Volume 9, Issue 2, Page 65-126, 2002.
wiley   +1 more source

Towards Fiducial Reference data at San Rossore site for Copernicus [PDF]

open access: yes
This technical report summarizes the results of a gap analysis aimed to identify the measurements needed to parameterize a 3D virtual model of the Integrated Carbon Observation System (ICOS) San Rossore 2 (IT-SR2) ecosystem station installed in a stone ...
ARRIGA Nicola   +4 more
core   +1 more source

Development of an earth observation processing chain for crop biophysical parameters at local and global scale [PDF]

open access: yes, 2017
This thesis’ topics embrace remote sensing for Earth observation, specifically in Earth vegetation monitoring. The Thesis’ main objective is to develop and implement an operational processing chain for crop biophysical parameters estimation at both local
Campos Taberner, Manuel
core   +4 more sources

IMPROVING DECISION SUPPORT TOOLS VIA INTEGRATION OF REMOTELY SENSED DATA IN CROP MODELS [PDF]

open access: yes, 2018
La necessit\ue0 di garantire l\u2019accesso al cibo per una popolazione mondiale in continua crescita, adempiendo al contempo a precisi requisiti ambientali, rappresenta una grande sfida per il settore agroalimentare. Il successo, in questa sfida, pu\uf2
C. Gilardelli
core   +1 more source

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