http://tdk.bme.hu/EMK/foldmesterinf/Az-ionoszfera-GPS-jelekben-okozott-keslelteto
http://tdk.bme.hu/EMK/geodezia/GPS-meresek-ionoszferikus-hatasanak
GCP – Rinex File Parser
GridModel – Grid based Ionosphere model
IonosphereModeler – The main program for creating the grid model
Spherical – Spherical function based model, and solver program for the spherical function
iono_PCA – Principle component analysis for ionosphere status vectors