Performance Evaluation of Ionosphere Modeling Using Spherical Harmonics in the Korean Peninsula Apr 1, 2013· Deokhwa Han Ho Yun Changdon Kee · 0 min read DOI Last updated on Apr 1, 2013 Authors Deokhwa Han Ph.D Authors Ho Yun Ph.D Authors Changdon Kee Professor ← “Preliminary Test Results of Pseudolite-Based Augmentation System (PBAS) Apr 1, 2013 DGPS Enhancement to GPS NMEA Output Data: DGPS by Correction Projection to Position-Domain Mar 1, 2013 →