A Review on Forest Height and Above-ground Biomass Estimation based on Synthetic Aperture Radar
Microwave remote sensing could interact with forest internal scatterers,because of its penetrability.So it could provide the parameters indicating forest vertical direction and be considered to have the potential to estimate forest vertical structure parameters.With the rapid development of the InSAR,PolInSAR,multi-baseline InSAR and multi-baseline PolInSAR technologies,the application in forestry for microwave remote sensing has been extended,provides a feasible solution to forest vertical structure parameters estimation.Firstly,the methods of extracting forest vertical structure profile based on the technology of tomography are summarized.Then,the methods for estimating topography,forest height and forest above ground biomass are described.Finally,the existential problems and research trends for forest vertical structure parameters estimation are analyzed.