Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2013
Authors
Thiago de Castro Vitalis Wekesa Rafael de Andrade Moral Borges Demetrio Italo Jr Delalibera Ingeborg KlingenAbstract
No abstract has been registered
Authors
Gayaneh Kyureghian Rodolfo M. Jr. NaygaAbstract
No abstract has been registered
Authors
Georgia S. Papoutsi Andreas C. Drichoutis Rodolfo M. Jr. NaygaAbstract
No abstract has been registered
Abstract
No abstract has been registered
Abstract
We provide a demonstration of the new tomographic profiling (TP) technique, here applied to forestry for the first time. The portable ground-based synthetic aperture radar (GB-SAR) system was used to capture profiles of the vertical polarimetric backscattering patterns through a 7 m tall stand of Norway spruce trees. The TP scheme collects data as for normal SAR imaging, but with the antennae aligned in the along-track direction. Adaptive post-processing meant that each TP scan simultaneously captured along-track image transects over the incidence angle range 0°–60°. An important feature of the derived image products is that incidence angle is constant at every point within an image. The measured HH–VV height backscatter profiles were very similar, whilst the cross-/co-polarization ratio showed very little variation with height through the stand. Backscattering profiles showed closest agreement with the branch biomass distribution through the canopy, rather than with trunk or branch + trunk biomasses. Equivalent interferometric tree heights were estimated from the centre of mass of the backscatter-height distribution, which displayed increasing height with increasing incidence angle. There was no significant vertical separation between the cross- and co-polarization returns.
Abstract
No abstract has been registered
Authors
I.N Bolotov A.A Makhrov Yu. V. Bespalaya I.V. Vikhrev O.V. Aksenova Paul Eric Aspholm M. Yu Gofarov A.N: Ostrovskii I. Yu. Popov I. S. Pal'tser M. Rudzite M. Rudzitis I. S. Voroshilova S.E. SokolovaAbstract
No abstract has been registered
Authors
Emma Brunberg Sanna Gille Sofia Mikko Gabriella Lindgren Linda J KeelingAbstract
No abstract has been registered
Abstract
No abstract has been registered
Authors
Pedro A. Alviola Rodolfo M. Jr. Nayga Michael ThomsenAbstract
No abstract has been registered