1. Universiti Kebangsaan Malaysia (UKM),Faculty of Engineering and Built Environment,Bangi,Selangor,Malaysia
2. Universiti Kebangsaan Malaysia (UKM),Space Science Center, Institute of Climate Change,Bangi,Selangor,Malaysia
3. Universiti Putra Malaysia (UPM),WiPNET Department of Computer and Communication Systems,Serdang,Selangor,Malaysia