1. J. Laštovička is at the Institute of Atmospheric Physics, 14131 Prague, Czech Republic.
2. R. A. Akmaev is at CIRES, University of Colorado, Boulder, CO 80309, USA.
3. G. Beig is at the Indian Institute of Tropical Meteorology, Pune-411 008, India.
4. J. Bremer is at the Leibnitz-Institute of Atmospheric Physics, 18225 Kühlungsborn, Germany.
5. J. T. Emmert is at the Naval Research Laboratory, Washington, DC 20375, USA.