F10.7 Index Yearly Average
average 188.5 for 56 years from January 1964 through 2019
data downloaded from https://omniweb.gsfc.nasa.gov/form/dx1.html open office spreadsheet
average 188.5 for 56 years from January 1964 through 2019
data downloaded from https://omniweb.gsfc.nasa.gov/form/dx1.html open office spreadsheet