“Performance Analysis of the spherical harmonics model for regional ionosphere during ionospheric storm condition May 1, 2014· Deokhwa Han , Ho Yun & Changdon Kee · 0 min read Last updated on May 1, 2014 Authors Deokhwa Han Ph.D ← “Correction Combination of Compact Network RTK Considering Tropospheric Delay Variation Over Height May 1, 2014 Predictions of Allowable Sensor Error Limit for Cycle-Slip Detection May 1, 2014 →