[P-CG20] 宇宙・惑星探査の将来計画および関連する機器開発の展望

[PCG20-01] High-Precision Permittivity Measurements with the Lunar Dielectric Analyzer (LDA) and Surface Dielectric Analyzer (SDA)

★Invited Papers

*宮本 英昭^1,2、小林 真輝人¹、村上 友規¹、竹倉 駿也¹、戸井田 愛理¹、清水 雄太¹、竹村 知洋¹、吉光 徹雄³、宇佐美 尚人³、大槻 真嗣³、國井 康晴⁴、前田 孝雄⁵、熊本 篤志⁶、仲内 悠祐⁷、新原 隆史⁸、臼井 寛裕³、長岡 央⁷、佐伯 和人⁷、John Culton²、Erik Asphaug⁹、姫野 武洋¹、Patrick Michel^10,1、渡邉 匡人¹¹ (1.東京大学、2.アデレード大学、3.JAXA、4.中央大学、5.東京農工大学、6.東北大学、7.立命館大学、8.岡山理科大学、9.アリゾナ大学、10.コートダジュール天文台、11.学習院大学)

キーワード：LDA、誘電率、月、小惑星、アルテミス

We are developing the Lunar Dielectric Analyzer (LDA) to investigate the dielectric properties of lunar regolith as part of the Artemis III mission. Designed as a deployable instrument for astronauts, LDA provides a simple, robust, and precise means of measuring surface permittivity. These measurements offer key insights into regolith properties, including density, composition, and volatile content. By operating across multiple frequencies and temperature conditions, LDA enables the characterization of vertical density structures and the detection of potential ice deposits in the shallow lunar subsurface.

Building on the same instrument design, we are also developing the Surface Dielectric Analyzer (SDA) for deployment on High Frontier, the first commercial asteroid mission by Karman+. This mission will rendezvous with a target asteroid, construct a detailed surface map, and perform an excavation demonstration during a touch-and-go maneuver using SLAM. SDA will measure the permittivity of asteroid materials, contributing to a deeper understanding of small body composition and surface evolution.

In addition to presenting these instruments and their scientific objectives, I will also discuss our related activities and broader vision for space resource exploration and utilization.