Covariance Analysis of Real-Time Precise GPS Orbit Estimated from Double-Differenced Carrier Phase Observations Aug 1, 2019· Sunkyoung Yu Donguk Kim Junesol Song Changdon Kee · 0 min read DOI Last updated on Aug 1, 2019 Authors Sunkyoung Yu Ph.D Authors Donguk Kim Ph.D Authors Junesol Song Ph.D Authors Changdon Kee Professor ← Preliminary Test Results of Compact Wide-Area RTK: A New Satellite-Based Augmentation System for Centimeter-Level Service Sep 1, 2019 Improving the Accuracy of Regional Ionospheric Mapping with Double-Difference Carrier Phase Measurement Aug 1, 2019 →