Dielectric Properties of Lunar Materials at the Chang’e-4 Landing Site
On January 3rd 2019, the Chang’e-4 mission successfully landed in the Von Kármán Crater inside the South Pole-Aitken (SPA) basin and achieved the first soft landing on the farside of the Moon. Lunar penetrating radar (LPR) equipped on the rover measured the shallow subsurface structure along the mot...
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ftdoajarticles:oai:doaj.org/article:6958b854950f43a6ad4e90a934d65f1e 2023-05-15T18:23:07+02:00 Dielectric Properties of Lunar Materials at the Chang’e-4 Landing Site Jialong Lai Feifei Cui Yi Xu Chaofei Liu Ling Zhang 2021-10-01T00:00:00Z https://doi.org/10.3390/rs13204056 https://doaj.org/article/6958b854950f43a6ad4e90a934d65f1e EN eng MDPI AG https://www.mdpi.com/2072-4292/13/20/4056 https://doaj.org/toc/2072-4292 doi:10.3390/rs13204056 2072-4292 https://doaj.org/article/6958b854950f43a6ad4e90a934d65f1e Remote Sensing, Vol 13, Iss 4056, p 4056 (2021) Chang’e-4 lunar penetrating radar loss tangent Science Q article 2021 ftdoajarticles https://doi.org/10.3390/rs13204056 2022-12-31T02:28:13Z On January 3rd 2019, the Chang’e-4 mission successfully landed in the Von Kármán Crater inside the South Pole-Aitken (SPA) basin and achieved the first soft landing on the farside of the Moon. Lunar penetrating radar (LPR) equipped on the rover measured the shallow subsurface structure along the motion path for more than 700 m. LPR data could be used to obtain the dielectric properties of the materials beneath the exploration area, providing important clues as to the composition and source of the materials. Although the properties of the upper fine-grained regolith have been studied using various methods, the underlying coarse-grained materials still lack investigation. Therefore, this paper intends to estimate the loss tangent of the coarse-grained materials at depth ranges of ~12 and ~28 m. Stochastic media models with different rock distributions for the LPR finite-difference time-domain (FDTD) simulation are built to evaluate the feasibility of the estimation method. Our results show that the average loss tangent value of coarse-grained materials is <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>0.0104</mn><mo>±</mo><mn>0.0027</mn></mrow></semantics></math> , and the abundance of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi mathvariant="normal">F</mi><mi mathvariant="normal">e</mi><msub><mi mathvariant="normal">O</mi><mi mathvariant="normal">T</mi></msub><mo>+</mo><mi mathvariant="normal">Ti</mi><msub><mi mathvariant="normal">O</mi><mn>2</mn></msub><mrow><mo> </mo><mi mathvariant="normal">is</mi><mo> </mo></mrow><mn>20.08</mn><mrow><mo> </mo><mi ... Article in Journal/Newspaper South pole Directory of Open Access Journals: DOAJ Articles South Pole Aitken ENVELOPE(-44.516,-44.516,-60.733,-60.733) Remote Sensing 13 20 4056 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Chang’e-4 lunar penetrating radar loss tangent Science Q |
spellingShingle |
Chang’e-4 lunar penetrating radar loss tangent Science Q Jialong Lai Feifei Cui Yi Xu Chaofei Liu Ling Zhang Dielectric Properties of Lunar Materials at the Chang’e-4 Landing Site |
topic_facet |
Chang’e-4 lunar penetrating radar loss tangent Science Q |
description |
On January 3rd 2019, the Chang’e-4 mission successfully landed in the Von Kármán Crater inside the South Pole-Aitken (SPA) basin and achieved the first soft landing on the farside of the Moon. Lunar penetrating radar (LPR) equipped on the rover measured the shallow subsurface structure along the motion path for more than 700 m. LPR data could be used to obtain the dielectric properties of the materials beneath the exploration area, providing important clues as to the composition and source of the materials. Although the properties of the upper fine-grained regolith have been studied using various methods, the underlying coarse-grained materials still lack investigation. Therefore, this paper intends to estimate the loss tangent of the coarse-grained materials at depth ranges of ~12 and ~28 m. Stochastic media models with different rock distributions for the LPR finite-difference time-domain (FDTD) simulation are built to evaluate the feasibility of the estimation method. Our results show that the average loss tangent value of coarse-grained materials is <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>0.0104</mn><mo>±</mo><mn>0.0027</mn></mrow></semantics></math> , and the abundance of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi mathvariant="normal">F</mi><mi mathvariant="normal">e</mi><msub><mi mathvariant="normal">O</mi><mi mathvariant="normal">T</mi></msub><mo>+</mo><mi mathvariant="normal">Ti</mi><msub><mi mathvariant="normal">O</mi><mn>2</mn></msub><mrow><mo> </mo><mi mathvariant="normal">is</mi><mo> </mo></mrow><mn>20.08</mn><mrow><mo> </mo><mi ... |
format |
Article in Journal/Newspaper |
author |
Jialong Lai Feifei Cui Yi Xu Chaofei Liu Ling Zhang |
author_facet |
Jialong Lai Feifei Cui Yi Xu Chaofei Liu Ling Zhang |
author_sort |
Jialong Lai |
title |
Dielectric Properties of Lunar Materials at the Chang’e-4 Landing Site |
title_short |
Dielectric Properties of Lunar Materials at the Chang’e-4 Landing Site |
title_full |
Dielectric Properties of Lunar Materials at the Chang’e-4 Landing Site |
title_fullStr |
Dielectric Properties of Lunar Materials at the Chang’e-4 Landing Site |
title_full_unstemmed |
Dielectric Properties of Lunar Materials at the Chang’e-4 Landing Site |
title_sort |
dielectric properties of lunar materials at the chang’e-4 landing site |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doi.org/10.3390/rs13204056 https://doaj.org/article/6958b854950f43a6ad4e90a934d65f1e |
long_lat |
ENVELOPE(-44.516,-44.516,-60.733,-60.733) |
geographic |
South Pole Aitken |
geographic_facet |
South Pole Aitken |
genre |
South pole |
genre_facet |
South pole |
op_source |
Remote Sensing, Vol 13, Iss 4056, p 4056 (2021) |
op_relation |
https://www.mdpi.com/2072-4292/13/20/4056 https://doaj.org/toc/2072-4292 doi:10.3390/rs13204056 2072-4292 https://doaj.org/article/6958b854950f43a6ad4e90a934d65f1e |
op_doi |
https://doi.org/10.3390/rs13204056 |
container_title |
Remote Sensing |
container_volume |
13 |
container_issue |
20 |
container_start_page |
4056 |
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1766202552123129856 |