1. Division of Science EducationCollege of Education, Daegu University Gyeongsan Gyeongbuk South Korea
2. Helmholtz Center Potsdam, GFZ, German Research Center For Geosciences, PotsdamGermany and University of Potsdam Potsdam Germany
3. Department of Earth, Planetary, and Space SciencesUniversity of California Los Angeles California USA
4. The Aerospace Corporation El Segundo California USA