1. Department of Physics University of Oxford Oxford UK
2. Space Research Institute IKI Moscow Russia
3. Laboratoire Atmosphères, Milieux, Observations Spatiales LATMOS/CNRS Paris France
4. Laboratoire de Mètèorologie Dynamique LMD/CNRS Paris France
5. School of Physical Sciences the Open University Milton Keynes UK
6. European Space Research and Technology Centre ESTEC Noordwijk The Netherlands