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Radio Propagation Indices
Copyright WDC C1 for STP at RAL.
Radio Propagation Index
This dataset holds the monthly values for a range of radio propagation
indices. They are the monthly mean International Sunspot Number, R, and
the IF2, IG indices based on foF2
observations from a range of stations around the world. The last two
indices are accompanied by their twelve-month running mean, and these
indices can be used to predict average ionospheric conditions. The database
holds the following information:
Data is available from 1932 to the present.
- Sunspot numbers.
Provisional and forecast values are received at the beginning of each month
by email from the Sunspot Index Data Centre (SIDC), Brussels.
Final values are taken from the 'Sunspot Bulletin' published by the SIDC.
- Ionospheric Indices (IF2, IG12).
These are taken from the bulletins produced at the Rutherford Appleton
Additional information available: