“ Efficient Ionospheric Model using Wavelet for Geomagnetic Storm Jan 1, 2009· Kyoungho Sohn Byungwoon Park Changdon Kee · 0 min read Last updated on Jan 1, 2009 Authors Byungwoon Park Ph.D Authors Changdon Kee Professor ← On-line Detection of Tracking Loss in Aviation GPS Receivers Using Frequency-lock Loops Apr 1, 2009 A Closed-Form Method for the Attitude Determination using GNSS Doppler Measurements Jan 1, 2009 →