The effect of 2D & 3D ionospheric model in interfrequency bias estimation Oct 1, 2006· Gyeongho Son Doyoon Kim Changdon Kee , Hyeonho No , Richard Langley · 0 min read Last updated on Oct 1, 2006 Authors Doyoon Kim Ph.D Authors Changdon Kee Professor ← SBAS Signal Synchronization Oct 1, 2006 UAV 의사위성 항법 시스템의 항법 메시지 형식 제안 Oct 1, 2006 →