1. Laboratoire de Physique Atmosphérique et PlanétaireUniversité de Liège Liège Belgium
2. Department of Space StudiesSouthwest Research Institute Boulder Colorado USA
3. LATMOS, IPSLCNRS, UVSQ, UPMC Guyancourt France
4. LASPUniversity of Colorado Boulder Boulder Colorado USA
5. Center for Space PhysicsBoston University Boston Massachusetts USA