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Estimation of Fores...
Estimation of Forest Height and Canopy Density From a Single InSAR Correlation Coefficient
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- Soja, Maciej, 1985 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Persson, H. (författare)
- Sveriges lantbruksuniversitet (SLU),Swedish University of Agricultural Sciences (SLU)
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- Ulander, Lars, 1962 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- Institute of Electrical and Electronics Engineers (IEEE), 2015
- 2015
- Engelska.
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Ingår i: IEEE Geoscience and Remote Sensing Letters. - : Institute of Electrical and Electronics Engineers (IEEE). - 1558-0571 .- 1545-598X. ; 12:3, s. 646-650
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Abstract
Ämnesord
Stäng
- A two-level model (TLM) is introduced and investigated for the estimation of forest height and canopy density from a single ground-corrected InSAR complex correlation coefficient. The TLM models forest as two scattering levels, namely, ground and vegetation, separated by a distance Delta h and with area-weighted backscatter ratio mu. The model is evaluated using eight VV-polarized bistatic-interferometric TanDEM-X image pairs acquired in the summers of 2011, 2012, and 2013 over the managed hemi-boreal test site Remningstorp, which is situated in southern Sweden. Ground phase is removed using a high-resolution digital terrain model. Inverted TLM parameters for thirty-two 0.5-ha plots of four different types (regular plots, sparse plots, seed trees, and clear-cuts) are studied against reference lidar data. It is concluded that the level distance Delta h can be used as an estimate of the 50th percentile forest height estimated from lidar (for regular plots: r > 0.95 and root-mean-square difference (sigma) 0.59 and sigma approximate to 10%, or 0.07).
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik -- Fjärranalysteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering -- Remote Sensing (hsv//eng)
Nyckelord
- synthetic aperture radar (SAR)
- interferometric model
- interferometry
- two-level model (TLM)
- forest height
- Canopy density
- TanDEM-X
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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