1. Physical Research Laboratory; Ahmedabad India
2. Meteorological Research Institute; Japan Meteorological Agency; Tsukuba Japan
3. Environmental and Water Resources Engineering Division; Department of Civil Engineering; Indian Institute of Technology Madras; Chennai India
4. National Balloon Facility; Tata Institute of Fundamental Research; Hyderabad India
5. Laboratoire d'Aérologie; CNRS, Observatoire Midi-Pyrénées, UMR 5560; Toulouse France
6. Institut für Chemie und Dynamik der Geosphäre, Troposphäre (ICG-2); Forschungszentrum Jülich; Jülich Germany