Analysis of terrain influences in Pol-InSAR forest height estimation and attempts to the correction

Chuanrong Li; Yongsheng Zhou; Yonghe Zhang; Wen Hong

doi:10.1117/12.974343

21 November 2012 Analysis of terrain influences in Pol-InSAR forest height estimation and attempts to the correction

Chuanrong Li, Yongsheng Zhou, Yonghe Zhang, Wen Hong

Proceedings Volume 8536, SAR Image Analysis, Modeling, and Techniques XII; 853612 (2012) https://doi.org/10.1117/12.974343
Event: SPIE Remote Sensing, 2012, Edinburgh, United Kingdom

Abstract

Polarimetric Interferometric Synthetic Aperture Radar (Pol-InSAR) technique has been demonstrated its success in the estimation of forest height. Terrain slope is a factor that always affects the estimation accuracy. In this paper, the analysis of terrain influences was carried out in view of polarimetric orientation and local incidence angle shift, respectively. For the former, the relation between forest height estimation error and polarimetric orientation shift was derived by data simulation approach. For the latter, an analytical equation was derived by the theoretical analysis to describe the relation between true and estimated forest height. Then, possible methods for correcting terrain influences were presented, which including: 1) Design airborne experiment flight track along mountain ridge. 2) Utilize Pol-InSAR optimal coherences for forest height inversion if the computational efficiency is not an issue. 3) Revise the estimated forest height from RVoG model inversion, where the range slope can be calculated by InSAR dataset or a priori DEM.

Citation Download Citation

Chuanrong Li, Yongsheng Zhou, Yonghe Zhang, and Wen Hong "Analysis of terrain influences in Pol-InSAR forest height estimation and attempts to the correction", Proc. SPIE 8536, SAR Image Analysis, Modeling, and Techniques XII, 853612 (21 November 2012); https://doi.org/10.1117/12.974343

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