Improved Onboard Orbit Propagator Test Result Using KOMPSAT-2 GPS Data Jan 1, 2011· Ghangho Kim , Tae Soo No Changdon Kee Sanghoon Jeon Chongwon Kim · 0 min read Last updated on Jan 1, 2011 Authors Ghangho Kim Ph.D Authors Changdon Kee Professor Authors Sanghoon Jeon Ph.D Authors Chongwon Kim Ph.D ← Carrier Phase-based RAIM Algorithm Using a Gaussian Sum Filter Jan 1, 2011 Korean WADGPS Development Plan Jan 1, 2011 →