Dielectric properties and stratigraphy of regolith in the lunar South Pole-Aitken basin: Observations from the Lunar Penetrating Radar
We examine data obtained by the Lunar Penetrating Radar (LPR) onboard the Chang'E-4 (CE-4) mission to study the dielectric properties and stratigraphy of lunar regolith on the far side of the Moon. The data collected from January 2019 to September 2020 were processed to generate a 540 m radargr...
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ftdatacite:10.48550/arxiv.2203.02840 2023-05-15T18:23:00+02:00 Dielectric properties and stratigraphy of regolith in the lunar South Pole-Aitken basin: Observations from the Lunar Penetrating Radar Feng, Jianqing Siegler, Matthew. A. White, Mackenzie N. 2022 https://dx.doi.org/10.48550/arxiv.2203.02840 https://arxiv.org/abs/2203.02840 unknown arXiv arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Earth and Planetary Astrophysics astro-ph.EP Geophysics physics.geo-ph FOS Physical sciences Preprint Article article CreativeWork 2022 ftdatacite https://doi.org/10.48550/arxiv.2203.02840 2022-04-01T12:16:33Z We examine data obtained by the Lunar Penetrating Radar (LPR) onboard the Chang'E-4 (CE-4) mission to study the dielectric properties and stratigraphy of lunar regolith on the far side of the Moon. The data collected from January 2019 to September 2020 were processed to generate a 540 m radargram. The travel velocity of the radar signal and the permittivity of the regolith were deduced from hyperbolas in the radargram. As CE-4 LPR detected distinct planar reflectors, we evaluated the dielectric loss from the maximum penetration depth based on the radar equation. The derived dielectric properties are compared with the measurements of Apollo samples and Chang'E-2 microwave radiometer observations. The results suggest that regolith at the landing site has a permittivity of 2.64-3.85 and a loss tangent of 0.0032-0.0044, indicating that the local regolith is composed of a fine-grained, low-loss material that is much more homogeneous than that found at the Chang'E-3 landing site. The total thickness of weathered material is 40 m, with several regolith layers and a buried craternidentified in the reconstructed subsurface structure. These layers clearly record a series of impact events from the adjacent regions. We suggest that the top layer is primarily made up of the ejecta from a large crater 140 km away. In contrast, the material source of other thinner layers comes from nearby smaller craters. : 9 pages, 9 figures Report South pole DataCite Metadata Store (German National Library of Science and Technology) Aitken ENVELOPE(-44.516,-44.516,-60.733,-60.733) South Pole The Landing ENVELOPE(-45.689,-45.689,-60.733,-60.733) |
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collection |
DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
language |
unknown |
topic |
Earth and Planetary Astrophysics astro-ph.EP Geophysics physics.geo-ph FOS Physical sciences |
spellingShingle |
Earth and Planetary Astrophysics astro-ph.EP Geophysics physics.geo-ph FOS Physical sciences Feng, Jianqing Siegler, Matthew. A. White, Mackenzie N. Dielectric properties and stratigraphy of regolith in the lunar South Pole-Aitken basin: Observations from the Lunar Penetrating Radar |
topic_facet |
Earth and Planetary Astrophysics astro-ph.EP Geophysics physics.geo-ph FOS Physical sciences |
description |
We examine data obtained by the Lunar Penetrating Radar (LPR) onboard the Chang'E-4 (CE-4) mission to study the dielectric properties and stratigraphy of lunar regolith on the far side of the Moon. The data collected from January 2019 to September 2020 were processed to generate a 540 m radargram. The travel velocity of the radar signal and the permittivity of the regolith were deduced from hyperbolas in the radargram. As CE-4 LPR detected distinct planar reflectors, we evaluated the dielectric loss from the maximum penetration depth based on the radar equation. The derived dielectric properties are compared with the measurements of Apollo samples and Chang'E-2 microwave radiometer observations. The results suggest that regolith at the landing site has a permittivity of 2.64-3.85 and a loss tangent of 0.0032-0.0044, indicating that the local regolith is composed of a fine-grained, low-loss material that is much more homogeneous than that found at the Chang'E-3 landing site. The total thickness of weathered material is 40 m, with several regolith layers and a buried craternidentified in the reconstructed subsurface structure. These layers clearly record a series of impact events from the adjacent regions. We suggest that the top layer is primarily made up of the ejecta from a large crater 140 km away. In contrast, the material source of other thinner layers comes from nearby smaller craters. : 9 pages, 9 figures |
format |
Report |
author |
Feng, Jianqing Siegler, Matthew. A. White, Mackenzie N. |
author_facet |
Feng, Jianqing Siegler, Matthew. A. White, Mackenzie N. |
author_sort |
Feng, Jianqing |
title |
Dielectric properties and stratigraphy of regolith in the lunar South Pole-Aitken basin: Observations from the Lunar Penetrating Radar |
title_short |
Dielectric properties and stratigraphy of regolith in the lunar South Pole-Aitken basin: Observations from the Lunar Penetrating Radar |
title_full |
Dielectric properties and stratigraphy of regolith in the lunar South Pole-Aitken basin: Observations from the Lunar Penetrating Radar |
title_fullStr |
Dielectric properties and stratigraphy of regolith in the lunar South Pole-Aitken basin: Observations from the Lunar Penetrating Radar |
title_full_unstemmed |
Dielectric properties and stratigraphy of regolith in the lunar South Pole-Aitken basin: Observations from the Lunar Penetrating Radar |
title_sort |
dielectric properties and stratigraphy of regolith in the lunar south pole-aitken basin: observations from the lunar penetrating radar |
publisher |
arXiv |
publishDate |
2022 |
url |
https://dx.doi.org/10.48550/arxiv.2203.02840 https://arxiv.org/abs/2203.02840 |
long_lat |
ENVELOPE(-44.516,-44.516,-60.733,-60.733) ENVELOPE(-45.689,-45.689,-60.733,-60.733) |
geographic |
Aitken South Pole The Landing |
geographic_facet |
Aitken South Pole The Landing |
genre |
South pole |
genre_facet |
South pole |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.2203.02840 |
_version_ |
1766202425988874240 |