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ASSESSMENT OF SUB-CANOPY STRUCTURE IN A COMPLEX CONIFEROUS FOREST
LiDAR understorey vegetation vegetation cover
2015/11/10
LiDAR technology emits narrow beams of laser light that are able to exploit gaps in the forest canopy and detect sub-canopy surfaces. In this study, we explore the potential of airborne LiDAR to quant...
TERRESTRIAL LIDAR MEASUREMENTS FOR ANALYSING CANOPY STRUCTURE IN AN OLD-GROWTH FOREST
tree height old-growth forest canopy structure canopy projection terrestrial lidar
2015/11/10
Terrestrial lidar measurements with the Leica HDS 4500 laserscanner (Imager 5003 from Z+F) were executed in a structurally highly diverse, at least 200-year-old natural 11-species forest with typical ...
USING AIRBORNE LIDAR FOR THE ASSESSMENT OF CANOPY STRUCTURE INFLUENCES ON CO2 FLUXES
airborne lidar carbon dioxide eddy covariance flux footprint canopy structure photosynthesis respiration
2015/11/10
Fluxes of carbon dioxide (CO2), water, and energy measured using the eddy covariance method (EC) will vary spatially and temporally within the catchment area of the EC system, especially if parts of t...
UAV-BORNE THERMAL IMAGING FOR FOREST HEALTH MONITORING:DETECTION OF DISEASE-INDUCED CANOPY TEMPERATURE INCREASE
Stress detection unmanned aerial vehicle unmanned aerial system UAV UAS camera calibration
2015/9/21
Climate change has a major influence on forest health and growth, by indirectly affecting the distribution and abundance of forest pathogens, as well as the severity of tree diseases. Temperature rise...
USE OF VERY HIGH-RESOLUTION AIRBORNE IMAGES TO ANALYSE 3D CANOPY ARCHITECTURE OF A VINEYARD
Vectorization of vine rows High-resolution DSM High-resolution images Drone UAV
2015/9/21
Differencing between green cover and grape canopy is a challenge for vigour status evaluation in viticulture. This paper presents the acquisition methodology of very high-resolution images (4 cm), usi...
LEAF AREA INDEX ESTIMATION IN VINEYARDS FROM UAV HYPERSPECTRAL DATA,2D IMAGE MOSAICS AND 3D CANOPY SURFACE MODELS
Precision agriculture biomass crop narrow band indices
2015/9/10
The indirect estimation of leaf area index (LAI) in large spatial scales is crucial for several environmental and agricultural applications. To this end, in this paper, we compare and evaluate LAI est...
COMPARISON OF DIFFERENT GROUND TECHNIQUES TO MAP LEAF AREA INDEX OF NORWAY SPRUCE FOREST CANOPY
LAI Sampling strategy PCA LAI-2000
2015/9/8
The leaf area index (LAI) of three monocultures of Norway spruce (Picea abies (L.) Karst), different in age and structure, was
measured by means of two indirect optical techniques of LAI field mappin...
COMPARING THREE CANOPY REFLECTANCE MODELS WITH HYPERSPECTRAL MULTI-ANGULAR SATELLITE DATA
Canopy reflectance models forward modelling radiative transfer
2015/9/8
Studies that compare modelled reflectances with satellite-measured reflectances for different wavelengths and view angles are still
rare. We compared model outputs from three different canopy reflect...
SIMULATING CANOPY GAP FRACTION OF COMPLEX 3D FOREST SCENES OF PICEA SITCHENSIS (SITKA SPRUCE)
Forestry 3D canopy modelling gap fraction
2015/9/8
We present an application of 3D canopy modelling for assessing the structural accuracy of complex 3D structural models of
Sitka spruce. Such models can be used to simulate canopy reflectance at the l...
RAMIS: A BIOPHOTONIC PHYSIOLOGICAL PLANT SENSOR (FIELD RADIOMETER FOR CANOPY REMOTE SENSING)
RAMIS Remote Sensing Agriculture
2015/9/8
A prototype instrument called RAMIS has been designed to non-destructively measure the biochemical properties of plant leaves
such as water, dry matter, and total chlorophyll content. The spectral di...
CANOPY WATER CONTENT RETRIEVAL FROM HYPERSPECTRAL REMOTE SENSING
Remote Sensing Hyperspectral Canopy Water Content
2015/9/8
Biogeochemical processes in plants, such as photosynthesis, evaporation and net primary production, are directly related to foliar
water. Therefore, canopy water content is important for the understa...
TWO-DIMENSIONAL FOREST CANOPY ARCHITECTURE FROM TERRESTRIAL LASER SCANNING
Terrestrial laser scanning forest gap fraction
2015/9/8
Terrestrial laser scanners (TLS) are now capable of collecting 3d data clouds consisting of the x,y,z coordinates of several million
laser hits, plus information on return intensity and, in some case...
RETRIEVAL OF CONIFEROUS CANOPY CHLOROPHYLL CONTENT FROM HIGH SPATIAL RESOLUTION HYPERSPECTRAL DATA
Remote Sensing Hyperspectral High Resolution
2015/9/8
The discrete Anisotropic Radiative Transfer (DART) model, coupled with an adjusted version of the PROSPECT model, was used to
retrieve total chlorophyll content (Cab) of a complex Norway spruce (Pice...
SPECTRAL INVARIANT BEHAVIOUR OF A COMPLEX 3D FOREST CANOPY
Spectral invariant 3D canopy structure Monte Carlo ray tracing
2015/9/8
We present an attempt to apply the spectral invariant approach to canopy scattering of a complex forest canopy. Spectral invariant
theory describes a method of expressing photon scattering as a funct...
MODELLING CANOPY REFLECTANCE WITH SPECTRAL INVARIANTS
Spectral invariant 3D canopy structure Monte Carlo ray tracing
2015/9/8
The concept of using spectral invariants to describe the scattering and absorption processes in a vegetation canopy has been
developed for application to remote sensing studies in recent years. It ha...