Polarimetric measurements of the lunar surface from lunar orbit soon will be available via Wide-Field Polarimetric Camera (PolCam) onboard the Korea Pathfinder Lunar Orbiter (KPLO), which is planned to be launched in mid 2022. To provide calibration data for the PolCam, we are conducting speckle polarimetric measurements of the nearside of the Moon from the Earth’s ground. It appears that speckle imaging of the Moon for scientific purposes has not been attempted before, and there is need for a procedure to create a “lucky image” from a number of observed speckle images. As a first step of obtaining calibration data for the PolCam from the ground, we search for the best sharpness measure for lunar surfaces. We then calculate the minimum number of speckle images and the number of images to be shift-and-added for higher resolution (sharpness) and signal-to-noise ratio.

Abstract
1. INTRODUCTION
2. OBSERVATIONS
3. METHODS AND ANALYSIS
    3.1. Mock Images with Known Speckle Patterns
    3.2. Sharpness Measurement Methods
    3.3. Stacking Selected Images
4. SUMMARY
ACKNOWLEDGMENTS
REFERENCES

• Jinkyu Kim(School of Space Research, Kyung Hee University,)
• Chae Kyung Sim(Korea Astronomy and Space Science Institute) Corresponding Author
• Minsup Jeong(Korea Astronomy and Space Science Institute)
• Hong-Kyu Moon(Korea Astronomy and Space Science Institute)
• Young-Jun Choi(Korea Astronomy and Space Science Institute,Astronomy and Space Science, University of Science and Technology)
• Sungsoo S Kim(School of Space Research, Kyung Hee University,Humanitas College, Global Campus, Kyung Hee University)
• Ho Jin(School of Space Research, Kyung Hee University,Department of Astronomy and Space Science, Kyung Hee University)