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Bistatic full-wave radar tomography detects deep interior voids, cracks and boulders in a rubble-pile asteroid model.

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Bistatic full-wave radar tomography detects deep interior voids, cracks and boulders in a rubble-pile asteroid model. / Sorsa, Liisa-Ida; Takala, Mika; Bambach, Patrick; Deller, Jakob; Vilenius, Esa; Pursiainen, Sampsa.

julkaisussa: Astrophysical Journal, Vuosikerta 872, Nro 1, 44, 08.02.2019.

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Sorsa, Liisa-Ida ; Takala, Mika ; Bambach, Patrick ; Deller, Jakob ; Vilenius, Esa ; Pursiainen, Sampsa. / Bistatic full-wave radar tomography detects deep interior voids, cracks and boulders in a rubble-pile asteroid model. Julkaisussa: Astrophysical Journal. 2019 ; Vuosikerta 872, Nro 1.

Bibtex - Lataa

@article{ddfd8fdb2b57450db975c6b66545d38a,
title = "Bistatic full-wave radar tomography detects deep interior voids, cracks and boulders in a rubble-pile asteroid model.",
abstract = "In this paper, we investigate full-wave computed radar tomography (CRT) using a rubble-pile asteroid model in which a realistic shape (Itokawa) is coupled with a synthetic material composition and structure model. The aim is to show that sparse bistatic radar measurements can distinguish details inside a complex-structured rubble-pile asteroid. The results obtained suggest that distinct local permittivity distribution changes such as surface layers, voids, low-permittivity anomalies, high-permittivity boulders, and cracks can be detected with bistatic CRT, when the total noise level in the data is around −10 dB with respect to the signal amplitude. Moreover, the bistatic measurement setup improves the robustness of the inversion compared to the monostatic case. Reconstructing the smooth Gaussian background distribution was found to be difficult with the present approach, suggesting that complementary techniques, such as gravimetry, might be needed to improve the reliability of the inference in practice.",
author = "Liisa-Ida Sorsa and Mika Takala and Patrick Bambach and Jakob Deller and Esa Vilenius and Sampsa Pursiainen",
year = "2019",
month = "2",
day = "8",
doi = "10.3847/1538-4357/aafba2",
language = "English",
volume = "872",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "American Astronomical Society",
number = "1",

}

RIS (suitable for import to EndNote) - Lataa

TY - JOUR

T1 - Bistatic full-wave radar tomography detects deep interior voids, cracks and boulders in a rubble-pile asteroid model.

AU - Sorsa, Liisa-Ida

AU - Takala, Mika

AU - Bambach, Patrick

AU - Deller, Jakob

AU - Vilenius, Esa

AU - Pursiainen, Sampsa

PY - 2019/2/8

Y1 - 2019/2/8

N2 - In this paper, we investigate full-wave computed radar tomography (CRT) using a rubble-pile asteroid model in which a realistic shape (Itokawa) is coupled with a synthetic material composition and structure model. The aim is to show that sparse bistatic radar measurements can distinguish details inside a complex-structured rubble-pile asteroid. The results obtained suggest that distinct local permittivity distribution changes such as surface layers, voids, low-permittivity anomalies, high-permittivity boulders, and cracks can be detected with bistatic CRT, when the total noise level in the data is around −10 dB with respect to the signal amplitude. Moreover, the bistatic measurement setup improves the robustness of the inversion compared to the monostatic case. Reconstructing the smooth Gaussian background distribution was found to be difficult with the present approach, suggesting that complementary techniques, such as gravimetry, might be needed to improve the reliability of the inference in practice.

AB - In this paper, we investigate full-wave computed radar tomography (CRT) using a rubble-pile asteroid model in which a realistic shape (Itokawa) is coupled with a synthetic material composition and structure model. The aim is to show that sparse bistatic radar measurements can distinguish details inside a complex-structured rubble-pile asteroid. The results obtained suggest that distinct local permittivity distribution changes such as surface layers, voids, low-permittivity anomalies, high-permittivity boulders, and cracks can be detected with bistatic CRT, when the total noise level in the data is around −10 dB with respect to the signal amplitude. Moreover, the bistatic measurement setup improves the robustness of the inversion compared to the monostatic case. Reconstructing the smooth Gaussian background distribution was found to be difficult with the present approach, suggesting that complementary techniques, such as gravimetry, might be needed to improve the reliability of the inference in practice.

U2 - 10.3847/1538-4357/aafba2

DO - 10.3847/1538-4357/aafba2

M3 - Article

VL - 872

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1

M1 - 44

ER -