Petteri Helander

Karri Muinonen^1,2, 

Timo Väisänen¹, 

Julia Martikainen¹, 

Johannes Markkanen^1,3, 

Antti Penttilä¹, 

Maria Gritsevich^1,4, 

Jouni Peltoniemi^1,2, 

Jürgen Blum⁵, 

Joonas Herranen¹, 

Gorden Videen^6,7, 

Göran Maconi¹, 

Petteri Helander¹, 

Ari Salmi¹, 

Ivan Kassamakov¹, 

Edward Haeggström¹ 

¹Department of Physics, University of Helsinki, 

², Finnish Geospatial Research Institute FGI, National Land Survey, 

³, Max Planck Institute for Solar System Research, 

⁴Institute of Physics and Technology, Ural Federal University, 

⁵Institut für Geophysik und Extraterrestrische Physik, Technische Universität Braunschweig, 

⁶, Space Science Institute, 

⁷, Army Research Laboratory