Fredeluces, E., Lagura, A.R., Reyes, R. and Kubo, N. 2020. Performance Evaluation of Low-Cost and Real-Time Multi-GNSS Advanced Demonstration Tool for Orbit and Clock Analysis-Precise Point Positioning (MADOCA-PPP) Receiver Systems. Asian Journal of Engineering and Technology. 8, 3 (Oct. 2020). DOI:https://doi.org/10.24203/ajet.v8i3.6357.