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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.

NIBIO's Scientific Publications →

2013

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Authors

John Marshall Bryden Stig Strandli Gezelius Karen Refsgaard

Abstract

No abstract has been registered

Authors

Arne Sæbø Hans Martin Hanslin Stanislaw W Gawronski

Abstract

No abstract has been registered

Authors

Celine Rebours Kari Skjånes P. Lindblad

Abstract

No abstract has been registered

Authors

Randi Berland Frøseth

Abstract

No abstract has been registered

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Authors

Helge Bonesmo Karen A. Beauchemin Odd Magne Harstad Arne Oddvar Skjelvåg

Abstract

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Authors

Adam O´Toole Hanna Marika Silvennoinen Daniel Rasse

Abstract

No abstract has been registered

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Authors

Karen Refsgaard Håvard Bergsdal Helge Berglann Johan Pettersen

Abstract

No abstract has been registered

Authors

Venche Talgø Gunn Strømeng Inger Sundheim Fløistad

Abstract

No abstract has been registered

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Authors

Keith Morrison John Bennett Svein Solberg

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.

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Authors

Matteo Balderacchi Pierre Benoit Philippe Cambier Ole Martin Eklo Alessandro Gargini Alexandra Gemitzi Melike Gurel Bjørn Kløve Zoran Nakic Elena Preda Stanko Ruzicic Przemyslaw Wachniew Marco Trevisan

Abstract

No abstract has been registered