Combination of Imaging Spectrometer Data and High-Resolution LIDAR Data by 3-D Radiative Transfer Modeling

Coniferous forests represent canopies with a high heterogeneity in the horizontal and as well in the vertical dimension. Consequently the interaction of incident radiation is dominated by the complex 3-D canopy structure and architecture. Radiative transfer approaches based on coupled leaf and canopy radiative transfer models (RTM) still allow the simulation of the multidirectional canopy reflectance as a function of leaf optical properties, canopy structure and viewing geometry as well as the retrieval of biophysical and biochemical canopy variables. High-resolution imaging spectrometry supported by light detection and ranging (LIDAR) data and the complex 3-D radiative transfer model FLIGHT (North, 1996) are employed to assess the influence of canopy heterogeneity and structure on canopy reflection. Exhaustive ground measurements of biochemical and biophysical parameters combined with the geometry of single trees derived from LIDAR data provide the possibility of a realistic scene parameterization of a boreal forest in Switzerland. Posted at the Zurich Open Repository and Archive, University of Zurich ZORA URL: https://doi.org/10.5167/uzh-98422 Published Version Originally published at: Koetz, Benjamin; Morsdorf, Felix; Kneubühler, Mathias; Schaepman, Michael E; Meier, Erich; Itten, Klaus I; Allgoewer, Britta (2004). Combination of imaging spectrometer data and high-resolution LIDAR data by 3-D radiative transfer modeling. In: 13th Annual JPL Airborne Earth Science Workshop, Pasadena, CA, USA, 31 March 2004 2 April 2004, 151-156. Combination of Imaging Spectrometer Data and High-Resolution LIDAR Data by 3-D Radiative Transfer Modeling Benjamin Koetz, Felix Morsdorf, Mathias Kneubuehler, Michael Schaepman, Erich Meier, Klaus Itten, and Britta Allgoewer