Applicability of RVOG Model in Tree Height Inversion Using P-Band Polinsar Backscatter Data

Utilizing simulated P-band PolInSAR backscatter data in pine forests, we qualitatively and quantitatively analyzed the applicability of the RVoG model in tree height inversion. Small radar incidence angles and low forest stand densities can decrease canopy continuity, invalidating a critical RVoG model assumption. Also, the ground backscatter decreases at a large radar incidence angle, reducing the accuracy of ground phase estimation. A high stand density can ensure good canopy continuity and stable tree height inversion. Thus, for better inversion, the radar incidence angle should be around 35°, and the stand density should be ≥ 300 stems/ha.