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Maciej soja l3_poster

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Maciej soja l3_poster

  1. 1. 0 5 10 15 20 25 30 35 Height[m] MODELLING OFTANDEM-X MEASURED FOREST HEIGHT FROM SMALL FOOTPRINT LIDAR DATA TanDEM-X (TDM) forest height map = TanDEM-X DEM – HiRes* DTM*grid: 2 m x 2 m, mean error < 0.5 m ACKNOWLEDGEMENTS This work was financially supported by the Swedish National Space Board (SNSB). TDM data were provided by German Aerospace Center (DLR). DEM was provided by Swedish Land Survey. Lidar data were acquired within the ESA BioSAR 2010 campaign. Maciej Jerzy Soja1) and Lars M. H. Ulander1,2) 1) Chalmers University of Technology, Gothenburg, Sweden 2) Swedish Defence Research Agency, Linköping, Sweden CONTACT Department of Earth and Space Sciences Chalmers University of Technology SE-412 96 Gothenburg, Sweden E-mail: maciej.soja@chalmers.se Internet: www.chalmers.se/rss Effect of forest sparseness at low HOA* *HOA = height of ambiguity Modelling TDM height from high resolution lidar height data (0.5 m x 0.5 m) : 𝛾� = ∑ exp 𝛼+𝑖𝑘 𝑧 ℎ ∑ exp 𝛼𝛼 𝛼 = 0.01 ℎ = arg 𝛾� 𝑘 𝑧 Two-layer model 𝛾� = exp 𝑖𝑘 𝑧Δℎ + 𝜇 1 + 𝜇⁄ 𝐻𝐻𝐻 = 2𝜋 𝑘 𝑧 = 𝜋𝜋 sin 𝜃 𝐵⊥ ℎ 𝑚𝑚𝑚 𝐻𝐻𝐻 = tan−1 sin 2𝜋Δℎ 𝐻𝐻𝐻 𝜇+cos 2𝜋Δℎ 𝐻𝐻𝐻 2𝜋� 0 2 4 6 -0.5 0 0.5 1 1.5 HOA/∆h hmod /∆h µ=0.01 µ=0.10 µ=0.50 µ=0.95 µ=1.05 µ=2.00 µ=10.00 µ=100.00 0 5 10 15 20 25 30 35 Height[m] Modelled h (HOA=49 m) Modelled h (HOA=37 m) TDM h (HOA=49 m) TDM h (HOA=37 m) 1 9 Plot 9: photo and lidar (below) 𝐵⊥ 𝑅 𝜃

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