Remote Sensing Applications

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Discretization of ocean surface.

Remote sensing of ocean, soil and ice, for example, requires simulation of electromagnetic scattering from dielectric rough surfaces. Another task that require EM modeling of targest with a lot of details, is remote sensing by forest. The calculations of full vector wave EM scattering from these targets are very demanding, leading to very large problems with a high number of degrees of freedom.

Our group have developed fast integral equation solvers for EM scattering from rough surfaces as well as from a pine tree. For rough surface scattering the technique is based on the single magnetic field integral equation formulation with triangular surface modeling. The computations are expedited with the adaptive integral method. For EM full-wave scattering from a (pine) tree we have developed a volume integral equation model accelerated with the multilevel fast multipole algorithm.

  • Fast integral equation methods.
  • Scattering by ocean surface and a pine tree.

 

References

  • T. Dufva, J. Praks, S. Järvenpää, and J. Sarvas: Scattering model for a pine tree employing VIE with a broadband MLFMA and comparison to ICA, IEEE Transactions on Geoscience and Remote Sensing, 43(3), 1119-1127, 2010.
  • A. Colliander and P. Ylä-Oijala: Electromagnetic scattering from rough surface using single integral equation and adaptive integral method, IEEE Transactions on Antennas and Propagation, 55(12), 3639-3646, 2007.
  • S. Järvenpää: Broadband multilevel fast multipole algorithm for locally refined meshes, Computational Electromagnetics Workshop, CEM'07, Izmir, Turkey, August 2007.

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