Seung Ryeol Lee

Learn More
Simultaneous observations of Lunar Radar Sounder (LRS) and Laser ALTimeter (LALT) of Kaguya, a Japanese lunar exploration project, were carried out for the purpose of mapping regolith layer thickness of the Moon. Nadir surface echo of a high-frequency (5 MHz) pulse of LRS interferes the shallow (<; 10 m) subsurface echo from the bottom of the regolith(More)
Synthetic aperture radar (SAR) processing was applied to the observation data of Lunar Radar Sounder (LRS), which is an HF sounder which was installed onboard a Japanese lunar exploration orbiter, Kaguya, for the purpose of imaging lunar subsurface structure. A two-media model was introduced to the LRS SAR algorithm to define the reference function of the(More)
Etching technique with a high selectivity, low damage and high anisotropy has been studied widely to satisfy the requirement for advanced semiconductor devices. It is effective to use neutral atoms as an etching species to prevent various anomaly originated in built-in charge due to ions as it is progressed for further miniaturization and precise dimension(More)
Chang'E-3, Chinese lunar landing mission, is scheduled to be launched in 2013 and is planned to land in Sinus Iridum. Its landing (rover) mission is planned to conduct Ground Penetrating Radar (GPR) measurement. In a context with the Chang'E-3 GPR mission, we investigated subsurface structure of Sinus Iridum by using Kaguya Lunar Radar Sounder (LRS) data.(More)
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(More)
  • 1