헬리콥터 비행시험을 통한 DGPS 성능평가Dec 1, 1998·Jeonghan KimChangdon Kee,Jaesik Im,Yongyun Kim· 0 min readLast updated on Dec 1, 1998 AuthorsJeonghan KimPh.DAuthorsChangdon KeeProfessor Emeritus← Single-frequency Differential GPS Accuracy Improvement via Local Area Ionospheric Time Delay model Development Jan 1, 1999GPS 반송파 위상을 이용한 동적 정밀 측위 Nov 1, 1998 →