TEC data International GNSS Service ftp://cddis.gsfc.nasa.gov/pub/gps/products/ionex

GOES satellites data NOAA's National Centers for Environmental Information https://satdat.ngdc.noaa.gov/sem/goes

Dst and SYM-H indices data Data Analysis Center for Geomagnetism and Space Magnetism http://wdc.kugi.kyoto-u.ac.jp