A Study on Accuracy Improvement of SBAS Ionospheric Correction Using Electron Density Distribution Model Jun 1, 2019· Bonggwan Choi Deokhwa Han Donguk Kim Changdon Kee · 0 min read Last updated on Jun 1, 2019 Authors Bonggwan Choi M.S Authors Deokhwa Han Ph.D Authors Donguk Kim Ph.D Authors Changdon Kee Professor ← Performance Improvement of Time-Differenced Carrier Phase Measurement-Based Integrated GPS/INS Considering Noise Correlation Jul 1, 2019 Development of MATLAB GUI Based Software for Monitoring Ionospheric Disturbances Jun 1, 2019 →