| Institution: | (1) Laboratory for Space Research, Utrecht;(2) Free University of Amsterdam, Amsterdam, Netherlands;(3) Delft University of Technology, Delft, Netherlands;(4) Free University of Amsterdam, Amsterdam, Netherlands;(5) Institut d'Astrophysique Paris, Paris, France;(6) Institute of Theoretical Physics, Utrecht;(7) University College London, London, UK;(8) European Southern Observatory, Garching b. München;(9) Netherlands Institute for Sea Research, Texel, The Netherlands;(10) Ond ejov Observatory, Czechoslovakia;(11) Astrophysical Institute of the Free University, Brussel;(12) Royal Netherlands Meteorological Institute, De Bilt;(13) Astronomical Institute, Ondejov;(14) Delft University of Technology, Delft;(15) Netherlands Agency for Aerospace Programs, Delft;(16) Institute of Earth Sciences Vening Meinesz Laboratory, Utrecht;(17) Herzberg Institute of Astrophysics, Ottawa, Ontario, Canada;(18) Copenhagen University Observatory, Copenhagen, Denmark;(19) Observatory of Geneva, Sauverny;(20) University Observatory, Leiden;(21) Astronomical Institute of the Ruhr-University, Bochum;(22) Department of Aerospace Engineering, Delft University of Technology, Delft |
