헬리콥터 비행시험을 통한 DGPS 성능평가 Dec 1, 1998· Jeonghan Kim Changdon Kee , Jaesik Im , Yongyun Kim · 0 min read Last updated on Dec 1, 1998 Authors Jeonghan Kim Ph.D Authors Changdon Kee Professor ← Single-frequency Differential GPS Accuracy Improvement via Local Area Ionospheric Time Delay model Development Jan 1, 1999 GPS 반송파 위상을 이용한 동적 정밀 측위 Nov 1, 1998 →