1. Manila Observatory Quezon City Philippines
2. Institute of Environmental Science and Meteorology University of the Philippines Diliman Quezon City Philippines
3. Department of Physics Ateneo de Manila University Quezon City Philippines
4. Department of Chemical and Environmental Engineering University of Arizona Tucson AZ USA
5. Now at Department of Hydrology and Atmospheric Sciences University of Arizona Tucson AZ USA
6. Philippine Nuclear Research Institute Department of Science and Technology Commonwealth Avenue Quezon City Philippines
7. Department of Hydrology and Atmospheric Sciences University of Arizona Tucson AZ USA