위성항법(GPS)을 이용한 항공기 자동착륙 시뮬레이션 Oct 1, 1997· Doohee Yun Changdon Kee · 0 min read Last updated on Oct 1, 1997 Authors Doohee Yun Ph.D Authors Changdon Kee Professor ← Wide Area Differential GPS (WADGPS) in East Asia Oct 1, 1997 Development of Local Ionospheric Time Delay Model for Single-frequency DGPS Users Sep 1, 1997 →