GPR observation of the Moon from orbit: Kaguya Lunar Radar Sounder

T. Kobayashi, S. R. Lee, A. Kumamoto, T. Ono

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Subsurface exploration of the Moon by an orbiting HF radar is reported. Lunar Radar Sounder (LRS) is an FMCW radar which was installed on a lunar exploration platform of Japan, Kaguya, in 2007. LRS operated in a frequency range of 4-6 MHz. A 30 m long dipole antenna was used as the transmitting/receiving antenna. A weighting function was applied to the transmitting pulse waveform so as to suppress range side lobes, which resulted in the range resolution of 150 m. During the operation, LRS covered the whole surface of the Moon with its footprint (∼5km in diameter) and carried out lunar subsurface exploration. Uncompressed observation data were returned to the ground station. Synthetic Aperture Radar process was applied to the data. Layered structures were found in many sites in 'mare' regions where the surface may be regarded flat and smooth, which indicate past lava flow activities in the regions. Some craters exhibit subsurface echoes which indicate inhomogeneous subsurface structure below the bottom of the craters.

Original languageEnglish
Title of host publicationProceedings of the 15th International Conference on Ground Penetrating Radar, GPR 2014
EditorsLara Pajewski, Christophe Craeye, Antonis Giannopoulos, Frederic Andre, Sebastien Lambot, Evert Slob
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1037-1041
Number of pages5
ISBN (Electronic)9781479967896
DOIs
Publication statusPublished - 2014 Dec 1
Event15th International Conference on Ground Penetrating Radar, GPR 2014 - Brussels, Belgium
Duration: 2014 Jun 302014 Jul 4

Publication series

NameProceedings of the 15th International Conference on Ground Penetrating Radar, GPR 2014

Other

Other15th International Conference on Ground Penetrating Radar, GPR 2014
CountryBelgium
CityBrussels
Period14/6/3014/7/4

Keywords

  • HF
  • Kaguya
  • LRS
  • Moon

ASJC Scopus subject areas

  • Environmental Engineering
  • Computer Networks and Communications
  • Signal Processing
  • Geotechnical Engineering and Engineering Geology
  • Electrical and Electronic Engineering

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