1. Korea Polar Research Institute Incheon South Korea
2. Department of Polar ScienceKorea University of Science and Technology Daejeon South Korea
3. Korea Astronomy and Space Science Institute Daejeon South Korea
4. Department of Astronomy and Space ScienceKorea University of Science and Technology Daejeon South Korea
5. Department of Astronomy and Space ScienceChungnam National University Daejeon South Korea
6. Sodankylä Geophysical ObservatoryUniversity of Oulu Tähteläntie Finland
7. Department of Astronomy and Space ScienceChungbuk National University Cheongju South Korea