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A coherent scattering model to determine forest backscattering in the VHF-band
Chalmers Univ Technol, Dept Radio & Space Sci, S-41296 Gothenburg, Sweden Natl Def Res Estab, Dept Sensor Technol, S-58111 Linkoping, Sweden.
Chalmers Univ Technol, Dept Radio & Space Sci, S-41296 Gothenburg, Sweden Natl Def Res Estab, Dept Sensor Technol, S-58111 Linkoping, Sweden.
Chalmers Univ Technol, Dept Radio & Space Sci, S-41296 Gothenburg, Sweden Natl Def Res Estab, Dept Sensor Technol, S-58111 Linkoping, Sweden.
Chalmers Univ Technol, Dept Radio & Space Sci, S-41296 Gothenburg, Sweden Natl Def Res Estab, Dept Sensor Technol, S-58111 Linkoping, Sweden.
2000 (English)In: IEEE Transactions on Geoscience and Remote Sensing, ISSN 0196-2892, E-ISSN 1558-0644, Vol. 38, no 1, 238-248 p.Article in journal (Refereed) Published
Abstract [en]

A coherent scattering model to determine the forest radar backscattering at VHF frequencies (20-90 MHz) has been de developed. The motivation for studying this frequency band is the recent development of the CARABAS Synthetic Aperture Radar (SAR). In order to model the scattering from branches and trunks, homogeneous dielectric cylinders placed above a semi-infinite dielectric ground have been analyzed. An analytical approach, where the theoretically exact currents induced in an infinite cylinder are truncated, has been compared to a numerical solution using the finite difference time domain (FDTD) method, If the first-order coherent ray tracing is included in the analytical approach, the results match well with the numerically exact FDTD solution. The results show that, in order to determine the VHF-backscattering from a forest stand, the coherent ground interaction is an important part and has to be considered. In this paper, modeling results are in good agreement with CARABAS measurements.

Place, publisher, year, edition, pages
2000. Vol. 38, no 1, 238-248 p.
Keyword [en]
backscattering, CARABAS, forestry, modeling, synthetic aperture radar (SAR), VHF
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-49863OAI: oai:DiVA.org:liu-49863DiVA: diva2:270759
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-12

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
  • html
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  • asciidoc
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