Complex-structured 3D-printed wireframes as asteroid analogues for tomographic microwave radar measurements

Autor: Liisa-Ida Sorsa, Christelle Eyraud, Mika Takala, Sampsa Pursiainen, Alain Herique, Jean-Michel Geffrin

Publikováno v: Materials and Design
Materials and Design, Elsevier, 2020, pp.109364. ⟨10.1016/j.matdes.2020.109364⟩
Materials & Design, Vol 198, Iss, Pp 109364-(2021)
Materials & Design
Materials & Design, 2021, 198, pp.109364. ⟨10.1016/j.matdes.2020.109364⟩

This study introduces a fused filament fabrication (FFF) process for manufacturing complex-structured asteroid analogue objects to be applied in tomographic microwave radar measurements and inversion studies. We describe an approach to control the vo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f8b004a310c917327f452a5217fde2c
https://hal.archives-ouvertes.fr/hal-03054178

A Time-Domain Multigrid Solver with Higher-Order Born Approximation for Full-Wave Radar Tomography of a Complex-Shaped Target

Autor: Sampsa Pursiainen, Liisa-Ida Sorsa, Christelle Eyraud, Mika Takala

Publikováno v: IEEE Transactions on Computational Imaging
IEEE Transactions on Computational Imaging, IEEE, 2020, pp.1-1. ⟨10.1109/TCI.2020.2964252⟩
IEEE Transactions on Computational Imaging, 2020, pp.1-1. ⟨10.1109/TCI.2020.2964252⟩

International audience; This paper introduces and evaluates numerically a multigrid solver for non-linear tomographic radar imaging. Our goal is to enable the fast and robust inversion of sparse time-domain data with a mathematical full-wave approach

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ebb39d0e961da5f102e830b2a1169cd
https://hal.archives-ouvertes.fr/hal-02431823

Tomographic inversion of gravity gradient field for a synthetic Itokawa model

Autor: Jessica Agarwal, Jakob Deller, Özgür Karatekin, Sampsa Pursiainen, Mika Takala, Esa Vilenius, Liisa-Ida Sorsa, Patrick Bambach, Kieran A. Carroll

This article investigates reconstructing the internal mass density of a numerical asteroid model using the gradient of a simulated gravity field as synthetic measurement data. Our goal is to advance the mathematical inversion methodology and find fea

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::acaefbd196fa123402f038e2b010bb12

Multigrid-based inversion for volumetric radar imaging with asteroid interior reconstruction as a potential application

Autor: Sampsa Pursiainen, Mika Takala, Defne Us

This study concentrates on advancing mathematical and computational methodology for radar tomography imaging in which the unknown volumetric velocity distribution of a wave within a bounded domain is to be reconstructed. Our goal is to enable effecti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be1a0762e2dba7103a256cdecda08a2e
http://arxiv.org/abs/1707.04605

Far-Field Inversion for the Deep Interior Scanning CubeSat

Autor: Esa Vilenius, Manfred Wittig, Sampsa Pursiainen, Mikko Kaasalainen, Harald Lentz, Mika Takala, Jakob Deller, Hans Martin Braun, Patrick Bambach

This study aims at advancing mathematical and computational techniques for reconstructing the interior structure of a near earth asteroid (NEA) via Computed Radar Tomography (CRT). We introduce a far-field model for full-wave CRT and validate it nume

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::03160c1bb7c28828dfd9e5558ee2612f