“ Efficient Ionospheric Model using Wavelet for Geomagnetic StormJan 1, 2009·Kyoungho SohnByungwoon ParkChangdon Kee· 0 min readLast updated on Jan 1, 2009 AuthorsByungwoon ParkPh.DAuthorsChangdon KeeProfessor Emeritus← On-line Detection of Tracking Loss in Aviation GPS Receivers Using Frequency-lock Loops Apr 1, 2009A Closed-Form Method for the Attitude Determination using GNSS Doppler Measurements Jan 1, 2009 →