Choi, Young-Jun - Scientific Aspects for Korean Lunar Exploration

Korea is going to launch the first orbiter in 2017 and both orbiter and lander around 2020 for lunar exploration. Since the surface of the Moon has been a witness of the Solar System history, currently lunar whole surface map in visible spectral range was completed through a camera of the latest lunar missions. However, because lunar surface continuously changes by impacts of meteorites, the surface should be observed again. In addition, it would be useful to use multi-wavelength polarimetry in visible range or to measure surface reflectance in ultraviolet spectral range. Polarization of lunar surface depends on both albedo and surface roughness, which is related to thermal properties results from infrared (IR) observation. Further IR observations are required for studying mineralogy and confirming the existence of water ice at permanent shadow region in both poles. IR spectral range for scientific study of lunar surface is classified as three regions according to recently results of the study. In the first range, 0.5-1.5㎛, absorption lines of Olivine, Pyroxene can be detected. Water, ice, OH absorption lines can be detected in 2.6-3.6 ㎛range. Christian Feature (CF), in 7-9 ㎛ range, shows silicate mineralogy. We will briefly discuss about current Korean lunar exploration status and its scientific aspects.