Performance Analysis on Multi-Constellation SBAS of the Modified L1-only SBAS Message Sep 1, 2017· Cheolsoon Lim , Donghyun Shin , Ho-Yon Hwang Byungwoon Park , Euiho Kim Changdon Kee , Seungwoo Seo , Junpyo Park · 0 min read Last updated on Sep 1, 2017 Authors Byungwoon Park Ph.D Authors Changdon Kee Professor ← Navigation Augmentation in Urban Area by HALE UAV with Onboard Pseudolite during Multi-Purpose Missions Sep 1, 2017 Single-frequency Divergence-free Hatch Filter for the Android N GNSS Raw Measurements Sep 1, 2017 →