1. Rajamangala University of Technology Suvarnabhumi,Faculty of Engineering and Architecture,Nonthaburi,Thailand
2. Civil Aviation Training Center,Aeronautical Engineering Division,Bangkok,Thailand
3. King Mongkut's University of Technology North Bangkok,Faculty of Engineering,Department of Electrical and Computer Engineering,Bangkok,Thailand
4. Rajamangala University of Technology Thanyaburi,Department of Electronics and Telecommunication Engineering,Pathumthani,Thailand
5. National Astronomical Research Instituite of Thailand,Centre of Observatory Operation and Engineering,Chiangmai,Thailand