HighlightsScattering mechanisms of tropical forests were studied using hybrid polarimetry.Tropical forest types were classified using hybrid polarimetric parameters.Usefulness of RISAT-1 data was demonstrated for low density biomass estimation.
AbstractIndia launched C band (5.35GHz) RISAT-1 (Radar Imaging Satellite-1) on 26th April, 2012, equipped with the capability to image the Earth at multiple-resolutions and -polarizations. In this study the potential of Fine Resolution Strip (FRS) modes of RISAT-1 was evaluated for characterization and classification forests and estimation of biomass of early growth stages. The study was carried out at the two sites located in the foothills of western Himalaya, India. The pre-processing and classification of FRS-1 SAR data was performed using PolSAR Pro ver. 5.0 software. The scattering mechanisms derived from m-chi decomposition of FRS-1 RH/RV data were found physically meaningful for the characterization of various surface features types. The forest and land use type classification of the study area was developed applying Support Vector Machine (SVM) algorithm on FRS-1 derived appropriate polarimetric features. The biomass of early growth stages of Eucalyptus (up to 60ton/ha) was estimated developing a multi-linear regression model using C band σ0 HV and σ0 HH backscatter information. The study outcomes has promise for wider application of RISAT-1 data for forest cover monitoring, especially for the tropical regions.
Evaluation of RISAT-1 SAR data for tropical forestry applications
Advances in Space Research ; 59 , 1 ; 2-11
2016-08-23
10 pages
Article (Journal)
Electronic Resource
English
Evaluation of RISAT-1 SAR data for tropical forestry applications
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