10:10 〜 10:30
[PPS09-05] Lunar subsurface investigations through permittivity measurements
★Invited Papers
キーワード：月、誘電率、地下探査、地中レーダー
The lunar regolith not only holds information about the evolution of the lunar surface but also serves as a crucial reservoir for volatiles such as water ice. While direct observations are essential for obtaining information about the regolith, radar exploration is one of the valuable tools for obtaining subsurface information over a wide area down to the thickness of the regolith. Radar exploration provides the permittivity information of the subsurface, which can contribute to a comprehensive understanding of the state of the lunar subsurface.
Permittivity is associated with the bulk density and chemical composition, particularly FeO+TiO2, on the Moon. Recently, we found that another parameter, temperature, is also significant in determining the bulk permittivity of the lunar regolith based on laboratory measurements (Kobayashi et al., 2023). In addition, we pointed out that the temperature may alter the radar data, which has been ignored (Sun et al., submitted).
In this talk, we will present the importance of the temperature dependence of the permittivity for the interpretation of radar data. We will also introduce the ongoing radar exploration methods and permittivity instruments that we are currently employing, and present our strategy for obtaining the information about the subsurface of celestial bodies.
Permittivity is associated with the bulk density and chemical composition, particularly FeO+TiO2, on the Moon. Recently, we found that another parameter, temperature, is also significant in determining the bulk permittivity of the lunar regolith based on laboratory measurements (Kobayashi et al., 2023). In addition, we pointed out that the temperature may alter the radar data, which has been ignored (Sun et al., submitted).
In this talk, we will present the importance of the temperature dependence of the permittivity for the interpretation of radar data. We will also introduce the ongoing radar exploration methods and permittivity instruments that we are currently employing, and present our strategy for obtaining the information about the subsurface of celestial bodies.