Abstract
Polarimetric SAR remote sensing has shown its potential for forest structural and biophysical parameter retrieval. Multibaseline polarimetric data in interferometric mode were acquired from space-borne C-band SAR system over Dudhwa National Park, India. Potential of multibaseline SAR tomography data was tested with six scenes of SAR data for forest height retrieval. Capon spectral estimation algorithm was implemented on PolInSAR data for vertical profile generation. Vertical profile generated from capon algorithm had shown different forest height values at different locations in range direction for single azimuth bin. Maximum height value recorded from the vertical profile was 45 m and the minimum height was 5 m. The algorithm was implemented for all the locations for which field data was collected for forest height measurement. Tomography based forest height was compared with field-measured forest height for 190 locations of the study area. Coefficient of determination and root mean square error obtained from the relationship between field and modelled forest heights were 0.91 and 3.91 m respectively. This study concluded that forest height with reliable accuracy can be retrieved with space-borne PolInSAR tomography.
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Schedule a callMore From: Proceedings of the National Academy of Sciences, India Section A: Physical Sciences
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