1. Instituto de Astrofísica de Andalucía, CSIC Glorieta de la Astronomia s/n Granada Spain
2. Deutsches Zentrum für Luft‐ und Raumfahrt, Institut für Physik der Atmosphäre Oberpfaffenhofen Germany
3. National Space Institute Technical University of Denmark (DTU Space) Kongens Lyngby Denmark
4. Image Processing Laboratory University of Valencia Valencia Spain
5. Key Laboratory of Geospace Environment, Chinese Academy of Sciences University of Science and Technology of China Hefei China
6. Key Laboratory for Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China
7. Key Laboratory of Middle Atmosphere and Global Environment Observation (LAGEO) Institute of Atmospheric Physics, Chinese Academy of Sciences Beijing China
8. Now at Electrical and Computer Engineering Department Duke University Durham NC USA
9. Birkeland Centre for Space Science, Department of Physics and Technology Bergen Norway