Index of ftp://ftp.ngdc.noaa.gov/STP/space-weather/ionospheric-data/sids

[DIR] Parent Directory

[DIR] aavso  5.00b  October 26 2014
[DIR] documentation  6.00b  August 10 2014
[DIR] field-strength  16.00b  March 23 2014
[DIR] reports  61.00b  September 7 2014
[DIR] tables  14.00b  September 1 2014
[DIR] ww2-ionodata  5.00b  March 23 2014