1. Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ 85721, USA
2. Manila Observatory, Quezon City 1108, Philippines
3. Department of Physics, School of Science and Engineering, Ateneo de Manila University, Quezon City 1108, Philippines
4. Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ 85721, USA
5. Philippine Nuclear Research Institute – Department of Science and Technology, Commonwealth Avenue, Diliman, Quezon City 1101, Philippines