1. Radiation Physics Lab., Department of Physics, COMSATS Institute of Information Technology, Park Road, Islamabad, Pakistan
2. Department of Meteorology, COMSATS Institute of Information Technology, Park Road, Islamabad, Pakistan
3. Pakistan Meteorology Department, Gilgit, Pakistan
4. Department of Mathematics and Geosciences, University of Trieste, Via Weiss 2, Trieste, 34128, Italy