1. Grupo de Óptica Atmosférica de Camagüey, Centro Meteorológico de Camagüey, Instituto de Meteorología de la República de Cuba, Cuba.
2. UNAVCO, Boulder, CO 80301, USA.
3. University Corporation for Atmospheric Research, Boulder, CO 80305, USA.
4. Department of Earth and Atmospheric Sciences, University of Houston, TX 77004, USA.
5. Department of Environmental Sciences, Rutgers University, New Brunswick, NJ 08901, USA.