Sakidin, H., T.C. Chuan, and S. Sakidin. “The Effect Of Modified UNBabc Mapping Function On The Improvement Of Global Positioning System Tropospheric Delay”. Journal of Engineering and Technology (JET) 1 (June 30, 2010): 129–136. Accessed December 22, 2024. https://jet.utem.edu.my/jet/article/view/140.