Index of ftp://ftp.ngdc.noaa.gov/STP/space-weather/solar-data/solar-indices

[DIR] Parent Directory

[DIR] bulletin  3.00b  August 10 2014
[DIR] documentation  2.00b  September 9 2012
[DIR] solar_corona  6.00b  December 20 2013
[DIR] sunspot-numbers  10.00b  November 29 2016
[DIR] total-solar-irradiance  16.00b  March 20 2015