Method for detecting subsurface echoes in LRS data by surface scattering simulation

Material type: 文書・図像類

Author: 野澤, 仁史ほか

Publisher: 宇宙航空研究開発機構(JAXA)

Publication date: 2022-12-23

Material Format: Digital

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Note (General)：: Subsurface structures of the Moon reflect the history of past volcanic activity and thermal evolution, and is important to understand the formation an...

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Material Type: 文書・図像類
Title: Method for detecting subsurface echoes in LRS data by surface scattering simulation
Author/Editor: 野澤, 仁史
春山, 純一
熊本, 篤志
岩田, 隆浩
NOZAWA, Hitoshi
HARUYAMA, Junichi
KUMAMOTO, Atsushi
IWATA, Takahiro
Author Heading: 野澤, 仁史
春山, 純一
熊本, 篤志
岩田, 隆浩
NOZAWA, Hitoshi
HARUYAMA, Junichi
KUMAMOTO, Atsushi
IWATA, Takahiro
Publication, Distribution, etc.: 宇宙航空研究開発機構(JAXA)
Publication Date: 2022-12-23
Publication Date (W3CDTF): 2022-12-23
Periodical title: 宇宙航空研究開発機構研究開発報告 = JAXA Research and Development Report
No. or year of volume/issue: JAXA-RR-22-005E
Volume: JAXA-RR-22-005E
Pages: 1-21
ISSN (Periodical Title): ISSN : 2433-2216
Text Language Code: eng
Subject Heading: LRS
subsurface structure
Moon
SELENE
Target Audience: 一般
Note (General): Subsurface structures of the Moon reflect the history of past volcanic activity and thermal evolution, and is important to understand the formation and evolution of the Moon. The Lunar Radar Sounder (LRS) has detected reflected echoes from the regolith layers formed between different subsurface lava units in many lunar Maria. From them, the lava eruption volume and eruption rate can be estimated. Both types of knowledge areimportant for elucidating lunar volcanic activity. Nevertheless, most subsurface analyses by LRS are limited to large-scale layered structures, and the subsurface structures below small-scale volcanic terrains which have been discovered in recent high-resolution camera images have not been detected using LRS. Because off-nadir surface scattering echoes are superimposed on nadir echoes from small-scale subsurface structure in LRS observation data, it is difficult for us to distinguish between the two. For this study, after we evaluated the surface scattering effects on the moon by surface scattering simulation, we compared them with LRS observation data to assess the detectability of small-scale subsurface echoes. Results for one ground track of LRS show the possibility of identifying small-scale subsurface echoes. The analytical method described herein can be applied to the lunar global area and could reveal the distribution of small-scale subsurface echoes and the subsurface structure on the global Moon in the future. These data are expected to contribute to a more detailed understanding of the volcanic history of the Moon.
形態: カラー図版あり
Physical characteristics: Original contains color illustrations
資料番号: AA2230011000
レポート番号: JAXA-RR-22-005E
DOI: 10.20637/00049005
Access Restrictions: 限定公開
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 宇宙航空研究開発機構 : 宇宙航空研究開発機構リポジトリ