A model relating VHF-band backscatter to stem volume of coniferous boreal forest

A physical model is presented describing the backscatter from coniferous boreal forests in the lower VHF-band in terms of stem volume. By using measurements of mean amplitude in high-resolution SAR images (rather than intensity), a linear dependence on stem volume can be obtained. The model fits wel...

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Bibliographic Details
Published in:IEEE transactions on geoscience and remote sensing 2000-03, Vol.38 (2), p.728-740
Main Authors: Smith, G., Ulander, L.M.H.
Format: Article
Language:English
Subjects:
Applied geophysics
Backscatter
Backscattering
Biomass
CARABAS
Earth sciences
Earth, ocean, space
Exact sciences and technology
forest biomass
Forestry
Forests
Frequency
Internal geophysics
Mathematical models
NATURAL SCIENCES
NATURVETENSKAP
Optical scattering
parameter retrieval
Radar scattering
Remote sensing
SAR
Saturation
scattering model
Soils
Space technology
Spatial resolution
stem volume
Surficial geology
Synthetic aperture radar
VHF
Volume measurement
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Summary:A physical model is presented describing the backscatter from coniferous boreal forests in the lower VHF-band in terms of stem volume. By using measurements of mean amplitude in high-resolution SAR images (rather than intensity), a linear dependence on stem volume can be obtained. The model fits well with the measurements made using the coherent all radio band sensing (CARABAS) SAR in the southern boreal forest, indicating the possibility of retrieving stem volume, and hence biomass, with an accuracy similar to that reached by standard ground-based measurements. No saturation of the scattering is seen up to biomasses of 550 m/sup 3//ha.
ISSN:0196-2892
1558-0644
1558-0644
DOI:10.1109/36.842002