Flight Test of DGPS-based Helicopter Landing System and Cockpit Display Oct 1, 1999· Changdon Kee Sungmin Park Jeonghan Kim Deokho Hwang Jaegyu Jang , Hyeongtaek Park , Hongman Park , Changhyo Lee · 0 min read Last updated on Oct 1, 1999 Authors Changdon Kee Professor Authors Sungmin Park Ph.D Authors Jeonghan Kim Ph.D Authors Deokho Hwang M.S Authors Jaegyu Jang Ph.D ← A Solution of a Natural way to Implement WADGPS in East Asia : Decentralized WADGPS Oct 1, 1999 GPS를 이용한 스키어(skier) 교육용 소프트웨어 개발 Oct 1, 1999 →