Development of Real-time SNUDGPS via Ionospheric and Tropospheric CorrectionsSep 1, 1999·Changdon KeeDoohee Yun· 0 min readLast updated on Sep 1, 1999 AuthorsChangdon KeeProfessor EmeritusAuthorsDoohee YunPh.D← A Solution of Natural Way to Implement WADGPS in East-Asia: Decentralized WADGPS Sep 1, 1999Flight Test of Helicopter Landing System Using Real-Time DGPS Sep 1, 1999 →