Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Mika Takala"'
Autor:
Liisa-Ida Sorsa, Christelle Eyraud, Alain Hérique, Mika Takala, Sampsa Pursiainen, Jean-Michel Geffrin
Publikováno v:
Materials & Design, Vol 198, Iss , Pp 109364- (2021)
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://doaj.org/article/7e0619aeb9aa461b813197ac21656178
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⟩
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
https://hal.archives-ouvertes.fr/hal-03054178
Autor:
Jean-Michel Geffrin, Christelle Eyraud, Liisa Ida Sorsa, Mika Takala, Sampsa Pursiainen, Gérard Henry
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2020, 643, pp.A68. ⟨10.1051/0004-6361/202038510⟩
Astronomy and Astrophysics-A&A, 2020, 643, pp.A68. ⟨10.1051/0004-6361/202038510⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2020, 643, pp.A68. ⟨10.1051/0004-6361/202038510⟩
Astronomy and Astrophysics-A&A, 2020, 643, pp.A68. ⟨10.1051/0004-6361/202038510⟩
Context. The small bodies of the Solar System, and especially their internal structures, are still not well-known. Studies of the interior of comets and asteroids could provide important information about their formation and also about the early Sola
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a8d3203273a8ad90788e329adb4ae4e3
https://hal.archives-ouvertes.fr/hal-02960004
https://hal.archives-ouvertes.fr/hal-02960004
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⟩
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
https://hal.archives-ouvertes.fr/hal-02431823
Autor:
Mika Takala, Manfred Wittig, Esa Vilenius, Patrick Bambach, Harald Lentz, Jakob Deller, Hans Martin Braun, Sampsa Pursiainen
Publikováno v:
Advances in Space Research. 62:3357-3368
We have performed an initial stage conceptual design study for the Deep Interior Scanning CubeSat (DISCUS), a tandem 6U CubeSat carrying a bistatic radar as main payload. DISCUS will be operated either as an independent mission or accompanying a larg
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
Autor:
Manfred Wittig, Mika Takala, Patrick Bambach, Hans Martin Braun, Harald Lentz, Sampsa Pursiainen, Jakob Deller, Esa Vilenius
Publikováno v:
2018 2nd URSI Atlantic Radio Science Meeting (AT-RASC).
This presentation concentrates on the possibility to perform radio tomography measurements using CubeSat spacecraft carrying a bistatic radar. We present both simulated tomography results and the conceptual DISCUS (Deep Interior Scanning CubeSat) spa
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
http://arxiv.org/abs/1707.04605
This study aims to advance hardware-level computations for travel-time tomography applications in which the wavelength is close to the diameter of the information that has to be recovered. Such can be the case, for example, in the imaging application
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc151a166cc2b31c274e039720ec221b
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