Single-frequency Differential GPS Accuracy Improvement via Local Area Ionospheric Time Delay model DevelopmentJan 1, 1999·Doohee YunChangdon Kee· 0 min readLast updated on Jan 1, 1999 AuthorsDoohee YunPh.DAuthorsChangdon KeeProfessor Emeritus← GPS 반송파를 이용한 정밀 측위 Jan 1, 1999헬리콥터 비행시험을 통한 DGPS 성능평가 Dec 1, 1998 →