Estimation of frequency dependence of lunar surface permittivity from various data obtained by Kaguya

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420402
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Measurement engineering
• Research Institution: Kanazawa University
• Principal Investigator: Goto Yoshitaka 金沢大学, 電子情報学系, 准教授 (30361976)
• Co-Investigator(Kenkyū-buntansha): YOSHIYA Kasahara 金沢大学, 総合メディア基盤センター, 教授 (50243051)
• Co-Investigator(Renkei-kenkyūsha): ATSUSHI Kumamoto 東北大学, 理学(系)研究科(研究院), 准教授 (00302076)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 惑星探査 / かぐや衛星 / 自然電波 / 月面誘電率 / オーロラキロメトリック放射

Outline of Final Research Achievements

Lunar surface permittivity is an important parameter for understanding the Moon and has been observed by many radar experiments from spacecraft. In these observations, frequencies of radio transmissions are generally high because of instrumental limitations. One of the interesting topics about the lunar surface permittivity is its frequency response in lower bands which is related to the moisture content. The Japanese lunar orbiter Kaguya carried out radar observations of the lunar subsurface structures and also passive observations of natural waves in super low frequency. In this study, we developed an estimation method of lunar surface permittivity for low frequencies by using the natural wave data of Kaguya. We also created a global map of lunar surface permittivity for high frequencies from the radar observations.

Free Research Field

電波工学