1. Department of Astronomy and Space Science; Chungnam National University; Daejeon South Korea
2. Division of Science Education, College of Education; Daegu University; Gyeongsan South Korea
3. Korea Astronomy and Space Science Institute; Daejeon South Korea
4. Department of Astronomy and Space Science; University of Science and Technology; Daejeon South Korea
5. Swedish Institute of Space Physics; Kiruna Sweden
6. Tromsø Geophysical Observatory; UiT-The Arctic University of Norway; Tromsø Norway