Institution: | 1. Service d'' Aéronomie du CNRS, BP 3, 91370, Verriéres, France;2. Laboratoire d''Astronomie Spatiale, Marseille, France;3. Institut d''Astrophysique, Paris, France;4. IKI, Moscow, U.S.S.R.;5. Byurakan Astrophysical Observatory, Armenia, U.S.S.R.;6. Center of Training of Cosmonauts, Moscow, U.S.S.R.;7. CNES, Paris, France |