Forest height inversion with single-baseline TanDEM-X InSAR coherence

doi:10.11947/j.AGCS.2022.20210298

Abstract

Abstract: Model-errors and inability of adapting to different forest scenes appear when the SINC function model simplified from RVoG model is applied to retrieve forest height with TanDEM-X interferometric SAR data. To solve the problem, a method of forest height inversion based on TanDEM-X InSAR coherence with the aid of a subset of LiDAR data is proposed, which is independent on global high-precision DEM products to provide ground phase information and uses coherence to obtain forest height only. In order to verify the feasibility of the method, TanDEM-X InSAR acquisitions obtained in two typical study sites in Spain are experimented, while LiDAR data is used for validation. The results show forest height is obtainable based on the single-baseline TanDEM-X InSAR coherence, whose accuracy are 2.34 m and 1.74 m respectively.

Key words: forest height, InSAR, TanDEM-X, SINC function model, C-SINC model

CLC Number:

P227

ZHANG Tao, ZHU Jianjun, FU Haiqiang, WANG Changcheng. Forest height inversion with single-baseline TanDEM-X InSAR coherence[J]. Acta Geodaetica et Cartographica Sinica, 2022, 51(9): 1931-1941.

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