“Modelling of ionospheric delay for SBAS using spherical harmonics functions Jun 1, 2013· Deokhwa Han Ho Yun Changdon Kee · 0 min read Last updated on Jun 1, 2013 Authors Deokhwa Han Ph.D Authors Ho Yun Ph.D Authors Changdon Kee Professor ← “A New User Integrity Monitoring for Multiple Ramp Failures Jun 1, 2013 구면조화 함수 기반 전리층 모델링의 광역보정시스템 적용가능성 연구 Apr 10, 2013 →