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Estimation of vegetation parameters such as Leaf Area Index from polarimetric SAR data
| Content Provider | Semantic Scholar |
|---|---|
| Author | Hetz, Marina Blumberg, Dan G. Rotman, Stanley R. |
| Copyright Year | 2010 |
| Abstract | This work presents the analysis of the capability to use the radar backscatter coefficient in semi-arid zones to estimate the vegetation crown in terms of Leaf Area Index (LAI). The research area is characterized by the presence of a pine forest with shrubs as an underlying vegetation layer (understory), olive trees, natural grove areas and eucalyptus trees. The research area was imaged by an airborne RADAR system in L-band during February 2009. The imagery includes multi-look radar images. All the images were fully polarized i.e., HH, VV, HV polarizations. For this research we used the central azimuth angle (113 ̊). We measured LAI using the ∆T Sun Scan Canopy Analysis System. Verification was done by analytic calculations and digital methods for the leaf's and needle's surface area. In addition, we estimated the radar extinction coefficient of the vegetation volume by comparing point calibration targets (trihedral corner reflectors with 150cm side length) within and without the canopy. The radar extinction in copolarized images was ∼26dB and ∼24dB for pines and olives respectively, compared to the same calibration target outside the vegetation. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://meetingorganizer.copernicus.org/EGU2010/EGU2010-8638.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
