He was principal investigator or coinvestigator for various ion, electron, and energetic neutral atom instruments on missions such as Phobos-2 (Mars), Mars-96 (Mars), Interball (Earth's magnatosphere), Munin (Swedish microsat), Astrid (Earth's magnatosphere), Double Star (Earth's magnatosphere), PRISMA (Swedish technology demostrator), MEAP (stratospheric balloon). He is author or co-author of about 200 publications in the field of space plasma physics. His primary research interests include environment and solar wind interactions with solar system bodies and space instrumentation.